linux/Documentation/devices.txt
<<
>>
Prefs
   1
   2                    LINUX ALLOCATED DEVICES (2.6+ version)
   3
   4             Maintained by Alan Cox <device@lanana.org>
   5
   6                      Last revised: 6th April 2009
   7
   8This list is the Linux Device List, the official registry of allocated
   9device numbers and /dev directory nodes for the Linux operating
  10system.
  11
  12The latest version of this list is available from
  13http://www.lanana.org/docs/device-list/ or
  14ftp://ftp.kernel.org/pub/linux/docs/device-list/.  This version may be
  15newer than the one distributed with the Linux kernel.
  16
  17The LaTeX version of this document is no longer maintained.
  18
  19This document is included by reference into the Filesystem Hierarchy
  20Standard (FHS).  The FHS is available from http://www.pathname.com/fhs/.
  21
  22Allocations marked (68k/Amiga) apply to Linux/68k on the Amiga
  23platform only.  Allocations marked (68k/Atari) apply to Linux/68k on
  24the Atari platform only.
  25
  26The symbol {2.6} means the allocation is obsolete and scheduled for
  27removal once kernel version 2.6 (or equivalent) is released. Some of these
  28allocations have already been removed.
  29
  30This document is in the public domain.  The author requests, however,
  31that semantically altered versions are not distributed without
  32permission of the author, assuming the author can be contacted without
  33an unreasonable effort.
  34
  35In particular, please don't sent patches for this list to Linus, at
  36least not without contacting me first.
  37
  38I do not have any information about these devices beyond what appears
  39on this list.  Any such information requests will be deleted without
  40reply.
  41
  42
  43          **** DEVICE DRIVERS AUTHORS PLEASE READ THIS ****
  44
  45To have a major number allocated, or a minor number in situations
  46where that applies (e.g. busmice), please contact me with the
  47appropriate device information.  Also, if you have additional
  48information regarding any of the devices listed below, or if I have
  49made a mistake, I would greatly appreciate a note.
  50
  51I do, however, make a few requests about the nature of your report.
  52This is necessary for me to be able to keep this list up to date and
  53correct in a timely manner.  First of all, *please* send it to the
  54correct address... <device@lanana.org>.  I receive hundreds of email
  55messages a day, so mail sent to other addresses may very well get lost
  56in the avalanche.  Please put in a descriptive subject, so I can find
  57your mail again should I need to.  Too many people send me email
  58saying just "device number request" in the subject.
  59
  60Second, please include a description of the device *in the same format
  61as this list*.  The reason for this is that it is the only way I have
  62found to ensure I have all the requisite information to publish your
  63device and avoid conflicts.
  64
  65Third, please don't assume that the distributed version of the list is
  66up to date.  Due to the number of registrations I have to maintain it
  67in "batch mode", so there is likely additional registrations that
  68haven't been listed yet.
  69
  70Fourth, remember that Linux now has extensive support for dynamic allocation
  71of device numbering and can use sysfs and udev to handle the naming needs.
  72There are still some exceptions in the serial and boot device area. Before
  73asking for a device number make sure you actually need one.
  74
  75Finally, sometimes I have to play "namespace police."  Please don't be
  76offended.  I often get submissions for /dev names that would be bound
  77to cause conflicts down the road.  I am trying to avoid getting in a
  78situation where we would have to suffer an incompatible forward
  79change.  Therefore, please consult with me *before* you make your
  80device names and numbers in any way public, at least to the point
  81where it would be at all difficult to get them changed.
  82
  83Your cooperation is appreciated.
  84
  85
  86  0             Unnamed devices (e.g. non-device mounts)
  87                  0 = reserved as null device number
  88                See block major 144, 145, 146 for expansion areas.
  89
  90  1 char        Memory devices
  91                  1 = /dev/mem          Physical memory access
  92                  2 = /dev/kmem         Kernel virtual memory access
  93                  3 = /dev/null         Null device
  94                  4 = /dev/port         I/O port access
  95                  5 = /dev/zero         Null byte source
  96                  6 = /dev/core         OBSOLETE - replaced by /proc/kcore
  97                  7 = /dev/full         Returns ENOSPC on write
  98                  8 = /dev/random       Nondeterministic random number gen.
  99                  9 = /dev/urandom      Faster, less secure random number gen.
 100                 10 = /dev/aio          Asynchronous I/O notification interface
 101                 11 = /dev/kmsg         Writes to this come out as printk's
 102                 12 = /dev/oldmem       Used by crashdump kernels to access
 103                                        the memory of the kernel that crashed.
 104
 105  1 block       RAM disk
 106                  0 = /dev/ram0         First RAM disk
 107                  1 = /dev/ram1         Second RAM disk
 108                    ...
 109                250 = /dev/initrd       Initial RAM disk
 110
 111                Older kernels had /dev/ramdisk (1, 1) here.
 112                /dev/initrd refers to a RAM disk which was preloaded
 113                by the boot loader; newer kernels use /dev/ram0 for
 114                the initrd.
 115
 116  2 char        Pseudo-TTY masters
 117                  0 = /dev/ptyp0        First PTY master
 118                  1 = /dev/ptyp1        Second PTY master
 119                    ...
 120                255 = /dev/ptyef        256th PTY master
 121
 122                Pseudo-tty's are named as follows:
 123                * Masters are "pty", slaves are "tty";
 124                * the fourth letter is one of pqrstuvwxyzabcde indicating
 125                  the 1st through 16th series of 16 pseudo-ttys each, and
 126                * the fifth letter is one of 0123456789abcdef indicating
 127                  the position within the series.
 128
 129                These are the old-style (BSD) PTY devices; Unix98
 130                devices are on major 128 and above and use the PTY
 131                master multiplex (/dev/ptmx) to acquire a PTY on
 132                demand.
 133
 134  2 block       Floppy disks
 135                  0 = /dev/fd0          Controller 0, drive 0, autodetect
 136                  1 = /dev/fd1          Controller 0, drive 1, autodetect
 137                  2 = /dev/fd2          Controller 0, drive 2, autodetect
 138                  3 = /dev/fd3          Controller 0, drive 3, autodetect
 139                128 = /dev/fd4          Controller 1, drive 0, autodetect
 140                129 = /dev/fd5          Controller 1, drive 1, autodetect
 141                130 = /dev/fd6          Controller 1, drive 2, autodetect
 142                131 = /dev/fd7          Controller 1, drive 3, autodetect
 143
 144                To specify format, add to the autodetect device number:
 145                  0 = /dev/fd?          Autodetect format
 146                  4 = /dev/fd?d360      5.25"  360K in a 360K  drive(1)
 147                 20 = /dev/fd?h360      5.25"  360K in a 1200K drive(1)
 148                 48 = /dev/fd?h410      5.25"  410K in a 1200K drive
 149                 64 = /dev/fd?h420      5.25"  420K in a 1200K drive
 150                 24 = /dev/fd?h720      5.25"  720K in a 1200K drive
 151                 80 = /dev/fd?h880      5.25"  880K in a 1200K drive(1)
 152                  8 = /dev/fd?h1200     5.25" 1200K in a 1200K drive(1)
 153                 40 = /dev/fd?h1440     5.25" 1440K in a 1200K drive(1)
 154                 56 = /dev/fd?h1476     5.25" 1476K in a 1200K drive
 155                 72 = /dev/fd?h1494     5.25" 1494K in a 1200K drive
 156                 92 = /dev/fd?h1600     5.25" 1600K in a 1200K drive(1)
 157
 158                 12 = /dev/fd?u360      3.5"   360K Double Density(2)
 159                 16 = /dev/fd?u720      3.5"   720K Double Density(1)
 160                120 = /dev/fd?u800      3.5"   800K Double Density(2)
 161                 52 = /dev/fd?u820      3.5"   820K Double Density
 162                 68 = /dev/fd?u830      3.5"   830K Double Density
 163                 84 = /dev/fd?u1040     3.5"  1040K Double Density(1)
 164                 88 = /dev/fd?u1120     3.5"  1120K Double Density(1)
 165                 28 = /dev/fd?u1440     3.5"  1440K High Density(1)
 166                124 = /dev/fd?u1600     3.5"  1600K High Density(1)
 167                 44 = /dev/fd?u1680     3.5"  1680K High Density(3)
 168                 60 = /dev/fd?u1722     3.5"  1722K High Density
 169                 76 = /dev/fd?u1743     3.5"  1743K High Density
 170                 96 = /dev/fd?u1760     3.5"  1760K High Density
 171                116 = /dev/fd?u1840     3.5"  1840K High Density(3)
 172                100 = /dev/fd?u1920     3.5"  1920K High Density(1)
 173                 32 = /dev/fd?u2880     3.5"  2880K Extra Density(1)
 174                104 = /dev/fd?u3200     3.5"  3200K Extra Density
 175                108 = /dev/fd?u3520     3.5"  3520K Extra Density
 176                112 = /dev/fd?u3840     3.5"  3840K Extra Density(1)
 177
 178                 36 = /dev/fd?CompaQ    Compaq 2880K drive; obsolete?
 179
 180                (1) Autodetectable format
 181                (2) Autodetectable format in a Double Density (720K) drive only
 182                (3) Autodetectable format in a High Density (1440K) drive only
 183
 184                NOTE: The letter in the device name (d, q, h or u)
 185                signifies the type of drive: 5.25" Double Density (d),
 186                5.25" Quad Density (q), 5.25" High Density (h) or 3.5"
 187                (any model, u).  The use of the capital letters D, H
 188                and E for the 3.5" models have been deprecated, since
 189                the drive type is insignificant for these devices.
 190
 191  3 char        Pseudo-TTY slaves
 192                  0 = /dev/ttyp0        First PTY slave
 193                  1 = /dev/ttyp1        Second PTY slave
 194                    ...
 195                255 = /dev/ttyef        256th PTY slave
 196
 197                These are the old-style (BSD) PTY devices; Unix98
 198                devices are on major 136 and above.
 199
 200  3 block       First MFM, RLL and IDE hard disk/CD-ROM interface
 201                  0 = /dev/hda          Master: whole disk (or CD-ROM)
 202                 64 = /dev/hdb          Slave: whole disk (or CD-ROM)
 203
 204                For partitions, add to the whole disk device number:
 205                  0 = /dev/hd?          Whole disk
 206                  1 = /dev/hd?1         First partition
 207                  2 = /dev/hd?2         Second partition
 208                    ...
 209                 63 = /dev/hd?63        63rd partition
 210
 211                For Linux/i386, partitions 1-4 are the primary
 212                partitions, and 5 and above are logical partitions.
 213                Other versions of Linux use partitioning schemes
 214                appropriate to their respective architectures.
 215
 216  4 char        TTY devices
 217                  0 = /dev/tty0         Current virtual console
 218
 219                  1 = /dev/tty1         First virtual console
 220                    ...
 221                 63 = /dev/tty63        63rd virtual console
 222                 64 = /dev/ttyS0        First UART serial port
 223                    ...
 224                255 = /dev/ttyS191      192nd UART serial port
 225
 226                UART serial ports refer to 8250/16450/16550 series devices.
 227
 228                Older versions of the Linux kernel used this major
 229                number for BSD PTY devices.  As of Linux 2.1.115, this
 230                is no longer supported.  Use major numbers 2 and 3.
 231
 232  4 block       Aliases for dynamically allocated major devices to be used
 233                when its not possible to create the real device nodes
 234                because the root filesystem is mounted read-only.
 235
 236                  0 = /dev/root
 237
 238  5 char        Alternate TTY devices
 239                  0 = /dev/tty          Current TTY device
 240                  1 = /dev/console      System console
 241                  2 = /dev/ptmx         PTY master multiplex
 242                  3 = /dev/ttyprintk    User messages via printk TTY device
 243                 64 = /dev/cua0         Callout device for ttyS0
 244                    ...
 245                255 = /dev/cua191       Callout device for ttyS191
 246
 247                (5,1) is /dev/console starting with Linux 2.1.71.  See
 248                the section on terminal devices for more information
 249                on /dev/console.
 250
 251  6 char        Parallel printer devices
 252                  0 = /dev/lp0          Parallel printer on parport0
 253                  1 = /dev/lp1          Parallel printer on parport1
 254                    ...
 255
 256                Current Linux kernels no longer have a fixed mapping
 257                between parallel ports and I/O addresses.  Instead,
 258                they are redirected through the parport multiplex layer.
 259
 260  7 char        Virtual console capture devices
 261                  0 = /dev/vcs          Current vc text contents
 262                  1 = /dev/vcs1         tty1 text contents
 263                    ...
 264                 63 = /dev/vcs63        tty63 text contents
 265                128 = /dev/vcsa         Current vc text/attribute contents
 266                129 = /dev/vcsa1        tty1 text/attribute contents
 267                    ...
 268                191 = /dev/vcsa63       tty63 text/attribute contents
 269
 270                NOTE: These devices permit both read and write access.
 271
 272  7 block       Loopback devices
 273                  0 = /dev/loop0        First loop device
 274                  1 = /dev/loop1        Second loop device
 275                    ...
 276
 277                The loop devices are used to mount filesystems not
 278                associated with block devices.  The binding to the
 279                loop devices is handled by mount(8) or losetup(8).
 280
 281  8 block       SCSI disk devices (0-15)
 282                  0 = /dev/sda          First SCSI disk whole disk
 283                 16 = /dev/sdb          Second SCSI disk whole disk
 284                 32 = /dev/sdc          Third SCSI disk whole disk
 285                    ...
 286                240 = /dev/sdp          Sixteenth SCSI disk whole disk
 287
 288                Partitions are handled in the same way as for IDE
 289                disks (see major number 3) except that the limit on
 290                partitions is 15.
 291
 292  9 char        SCSI tape devices
 293                  0 = /dev/st0          First SCSI tape, mode 0
 294                  1 = /dev/st1          Second SCSI tape, mode 0
 295                    ...
 296                 32 = /dev/st0l         First SCSI tape, mode 1
 297                 33 = /dev/st1l         Second SCSI tape, mode 1
 298                    ...
 299                 64 = /dev/st0m         First SCSI tape, mode 2
 300                 65 = /dev/st1m         Second SCSI tape, mode 2
 301                    ...
 302                 96 = /dev/st0a         First SCSI tape, mode 3
 303                 97 = /dev/st1a         Second SCSI tape, mode 3
 304                      ...
 305                128 = /dev/nst0         First SCSI tape, mode 0, no rewind
 306                129 = /dev/nst1         Second SCSI tape, mode 0, no rewind
 307                    ...
 308                160 = /dev/nst0l        First SCSI tape, mode 1, no rewind
 309                161 = /dev/nst1l        Second SCSI tape, mode 1, no rewind
 310                    ...
 311                192 = /dev/nst0m        First SCSI tape, mode 2, no rewind
 312                193 = /dev/nst1m        Second SCSI tape, mode 2, no rewind
 313                    ...
 314                224 = /dev/nst0a        First SCSI tape, mode 3, no rewind
 315                225 = /dev/nst1a        Second SCSI tape, mode 3, no rewind
 316                    ...
 317
 318                "No rewind" refers to the omission of the default
 319                automatic rewind on device close.  The MTREW or MTOFFL
 320                ioctl()'s can be used to rewind the tape regardless of
 321                the device used to access it.
 322
 323  9 block       Metadisk (RAID) devices
 324                  0 = /dev/md0          First metadisk group
 325                  1 = /dev/md1          Second metadisk group
 326                    ...
 327
 328                The metadisk driver is used to span a
 329                filesystem across multiple physical disks.
 330
 331 10 char        Non-serial mice, misc features
 332                  0 = /dev/logibm       Logitech bus mouse
 333                  1 = /dev/psaux        PS/2-style mouse port
 334                  2 = /dev/inportbm     Microsoft Inport bus mouse
 335                  3 = /dev/atibm        ATI XL bus mouse
 336                  4 = /dev/jbm          J-mouse
 337                  4 = /dev/amigamouse   Amiga mouse (68k/Amiga)
 338                  5 = /dev/atarimouse   Atari mouse
 339                  6 = /dev/sunmouse     Sun mouse
 340                  7 = /dev/amigamouse1  Second Amiga mouse
 341                  8 = /dev/smouse       Simple serial mouse driver
 342                  9 = /dev/pc110pad     IBM PC-110 digitizer pad
 343                 10 = /dev/adbmouse     Apple Desktop Bus mouse
 344                 11 = /dev/vrtpanel     Vr41xx embedded touch panel
 345                 13 = /dev/vpcmouse     Connectix Virtual PC Mouse
 346                 14 = /dev/touchscreen/ucb1x00  UCB 1x00 touchscreen
 347                 15 = /dev/touchscreen/mk712    MK712 touchscreen
 348                128 = /dev/beep         Fancy beep device
 349                129 =
 350                130 = /dev/watchdog     Watchdog timer port
 351                131 = /dev/temperature  Machine internal temperature
 352                132 = /dev/hwtrap       Hardware fault trap
 353                133 = /dev/exttrp       External device trap
 354                134 = /dev/apm_bios     Advanced Power Management BIOS
 355                135 = /dev/rtc          Real Time Clock
 356                139 = /dev/openprom     SPARC OpenBoot PROM
 357                140 = /dev/relay8       Berkshire Products Octal relay card
 358                141 = /dev/relay16      Berkshire Products ISO-16 relay card
 359                142 =
 360                143 = /dev/pciconf      PCI configuration space
 361                144 = /dev/nvram        Non-volatile configuration RAM
 362                145 = /dev/hfmodem      Soundcard shortwave modem control
 363                146 = /dev/graphics     Linux/SGI graphics device
 364                147 = /dev/opengl       Linux/SGI OpenGL pipe
 365                148 = /dev/gfx          Linux/SGI graphics effects device
 366                149 = /dev/input/mouse  Linux/SGI Irix emulation mouse
 367                150 = /dev/input/keyboard Linux/SGI Irix emulation keyboard
 368                151 = /dev/led          Front panel LEDs
 369                152 = /dev/kpoll        Kernel Poll Driver
 370                153 = /dev/mergemem     Memory merge device
 371                154 = /dev/pmu          Macintosh PowerBook power manager
 372                155 = /dev/isictl       MultiTech ISICom serial control
 373                156 = /dev/lcd          Front panel LCD display
 374                157 = /dev/ac           Applicom Intl Profibus card
 375                158 = /dev/nwbutton     Netwinder external button
 376                159 = /dev/nwdebug      Netwinder debug interface
 377                160 = /dev/nwflash      Netwinder flash memory
 378                161 = /dev/userdma      User-space DMA access
 379                162 = /dev/smbus        System Management Bus
 380                163 = /dev/lik          Logitech Internet Keyboard
 381                164 = /dev/ipmo         Intel Intelligent Platform Management
 382                165 = /dev/vmmon        VMWare virtual machine monitor
 383                166 = /dev/i2o/ctl      I2O configuration manager
 384                167 = /dev/specialix_sxctl Specialix serial control
 385                168 = /dev/tcldrv       Technology Concepts serial control
 386                169 = /dev/specialix_rioctl Specialix RIO serial control
 387                170 = /dev/thinkpad/thinkpad    IBM Thinkpad devices
 388                171 = /dev/srripc       QNX4 API IPC manager
 389                172 = /dev/usemaclone   Semaphore clone device
 390                173 = /dev/ipmikcs      Intelligent Platform Management
 391                174 = /dev/uctrl        SPARCbook 3 microcontroller
 392                175 = /dev/agpgart      AGP Graphics Address Remapping Table
 393                176 = /dev/gtrsc        Gorgy Timing radio clock
 394                177 = /dev/cbm          Serial CBM bus
 395                178 = /dev/jsflash      JavaStation OS flash SIMM
 396                179 = /dev/xsvc         High-speed shared-mem/semaphore service
 397                180 = /dev/vrbuttons    Vr41xx button input device
 398                181 = /dev/toshiba      Toshiba laptop SMM support
 399                182 = /dev/perfctr      Performance-monitoring counters
 400                183 = /dev/hwrng        Generic random number generator
 401                184 = /dev/cpu/microcode CPU microcode update interface
 402                186 = /dev/atomicps     Atomic shapshot of process state data
 403                187 = /dev/irnet        IrNET device
 404                188 = /dev/smbusbios    SMBus BIOS
 405                189 = /dev/ussp_ctl     User space serial port control
 406                190 = /dev/crash        Mission Critical Linux crash dump facility
 407                191 = /dev/pcl181       <information missing>
 408                192 = /dev/nas_xbus     NAS xbus LCD/buttons access
 409                193 = /dev/d7s          SPARC 7-segment display
 410                194 = /dev/zkshim       Zero-Knowledge network shim control
 411                195 = /dev/elographics/e2201    Elographics touchscreen E271-2201
 412                198 = /dev/sexec        Signed executable interface
 413                199 = /dev/scanners/cuecat :CueCat barcode scanner
 414                200 = /dev/net/tun      TAP/TUN network device
 415                201 = /dev/button/gulpb Transmeta GULP-B buttons
 416                202 = /dev/emd/ctl      Enhanced Metadisk RAID (EMD) control
 417                204 = /dev/video/em8300         EM8300 DVD decoder control
 418                205 = /dev/video/em8300_mv      EM8300 DVD decoder video
 419                206 = /dev/video/em8300_ma      EM8300 DVD decoder audio
 420                207 = /dev/video/em8300_sp      EM8300 DVD decoder subpicture
 421                208 = /dev/compaq/cpqphpc       Compaq PCI Hot Plug Controller
 422                209 = /dev/compaq/cpqrid        Compaq Remote Insight Driver
 423                210 = /dev/impi/bt      IMPI coprocessor block transfer
 424                211 = /dev/impi/smic    IMPI coprocessor stream interface
 425                212 = /dev/watchdogs/0  First watchdog device
 426                213 = /dev/watchdogs/1  Second watchdog device
 427                214 = /dev/watchdogs/2  Third watchdog device
 428                215 = /dev/watchdogs/3  Fourth watchdog device
 429                216 = /dev/fujitsu/apanel       Fujitsu/Siemens application panel
 430                217 = /dev/ni/natmotn           National Instruments Motion
 431                218 = /dev/kchuid       Inter-process chuid control
 432                219 = /dev/modems/mwave MWave modem firmware upload
 433                220 = /dev/mptctl       Message passing technology (MPT) control
 434                221 = /dev/mvista/hssdsi        Montavista PICMG hot swap system driver
 435                222 = /dev/mvista/hasi          Montavista PICMG high availability
 436                223 = /dev/input/uinput         User level driver support for input
 437                224 = /dev/tpm          TCPA TPM driver
 438                225 = /dev/pps          Pulse Per Second driver
 439                226 = /dev/systrace     Systrace device
 440                227 = /dev/mcelog       X86_64 Machine Check Exception driver
 441                228 = /dev/hpet         HPET driver
 442                229 = /dev/fuse         Fuse (virtual filesystem in user-space)
 443                230 = /dev/midishare    MidiShare driver
 444                231 = /dev/snapshot     System memory snapshot device
 445                232 = /dev/kvm          Kernel-based virtual machine (hardware virtualization extensions)
 446                233 = /dev/kmview       View-OS A process with a view
 447                234 = /dev/btrfs-control        Btrfs control device
 448                235 = /dev/autofs       Autofs control device
 449                236 = /dev/mapper/control       Device-Mapper control device
 450                240-254                 Reserved for local use
 451                255                     Reserved for MISC_DYNAMIC_MINOR
 452
 453 11 char        Raw keyboard device     (Linux/SPARC only)
 454                  0 = /dev/kbd          Raw keyboard device
 455
 456 11 char        Serial Mux device       (Linux/PA-RISC only)
 457                  0 = /dev/ttyB0        First mux port
 458                  1 = /dev/ttyB1        Second mux port
 459                    ...
 460
 461 11 block       SCSI CD-ROM devices
 462                  0 = /dev/scd0         First SCSI CD-ROM
 463                  1 = /dev/scd1         Second SCSI CD-ROM
 464                    ...
 465
 466                The prefix /dev/sr (instead of /dev/scd) has been deprecated.
 467
 468 12 char        QIC-02 tape
 469                  2 = /dev/ntpqic11     QIC-11, no rewind-on-close
 470                  3 = /dev/tpqic11      QIC-11, rewind-on-close
 471                  4 = /dev/ntpqic24     QIC-24, no rewind-on-close
 472                  5 = /dev/tpqic24      QIC-24, rewind-on-close
 473                  6 = /dev/ntpqic120    QIC-120, no rewind-on-close
 474                  7 = /dev/tpqic120     QIC-120, rewind-on-close
 475                  8 = /dev/ntpqic150    QIC-150, no rewind-on-close
 476                  9 = /dev/tpqic150     QIC-150, rewind-on-close
 477
 478                The device names specified are proposed -- if there
 479                are "standard" names for these devices, please let me know.
 480
 481 12 block
 482
 483 13 char        Input core
 484                  0 = /dev/input/js0    First joystick
 485                  1 = /dev/input/js1    Second joystick
 486                    ...
 487                 32 = /dev/input/mouse0 First mouse
 488                 33 = /dev/input/mouse1 Second mouse
 489                    ...
 490                 63 = /dev/input/mice   Unified mouse
 491                 64 = /dev/input/event0 First event queue
 492                 65 = /dev/input/event1 Second event queue
 493                    ...
 494
 495                Each device type has 5 bits (32 minors).
 496
 497 13 block       8-bit MFM/RLL/IDE controller
 498                  0 = /dev/xda          First XT disk whole disk
 499                 64 = /dev/xdb          Second XT disk whole disk
 500
 501                Partitions are handled in the same way as IDE disks
 502                (see major number 3).
 503
 504 14 char        Open Sound System (OSS)
 505                  0 = /dev/mixer        Mixer control
 506                  1 = /dev/sequencer    Audio sequencer
 507                  2 = /dev/midi00       First MIDI port
 508                  3 = /dev/dsp          Digital audio
 509                  4 = /dev/audio        Sun-compatible digital audio
 510                  6 =
 511                  7 = /dev/audioctl     SPARC audio control device
 512                  8 = /dev/sequencer2   Sequencer -- alternate device
 513                 16 = /dev/mixer1       Second soundcard mixer control
 514                 17 = /dev/patmgr0      Sequencer patch manager
 515                 18 = /dev/midi01       Second MIDI port
 516                 19 = /dev/dsp1         Second soundcard digital audio
 517                 20 = /dev/audio1       Second soundcard Sun digital audio
 518                 33 = /dev/patmgr1      Sequencer patch manager
 519                 34 = /dev/midi02       Third MIDI port
 520                 50 = /dev/midi03       Fourth MIDI port
 521
 522 14 block
 523
 524 15 char        Joystick
 525                  0 = /dev/js0          First analog joystick
 526                  1 = /dev/js1          Second analog joystick
 527                    ...
 528                128 = /dev/djs0         First digital joystick
 529                129 = /dev/djs1         Second digital joystick
 530                    ...
 531 15 block       Sony CDU-31A/CDU-33A CD-ROM
 532                  0 = /dev/sonycd       Sony CDU-31a CD-ROM
 533
 534 16 char        Non-SCSI scanners
 535                  0 = /dev/gs4500       Genius 4500 handheld scanner
 536
 537 16 block       GoldStar CD-ROM
 538                  0 = /dev/gscd         GoldStar CD-ROM
 539
 540 17 char        OBSOLETE (was Chase serial card)
 541                  0 = /dev/ttyH0        First Chase port
 542                  1 = /dev/ttyH1        Second Chase port
 543                    ...
 544 17 block       Optics Storage CD-ROM
 545                  0 = /dev/optcd        Optics Storage CD-ROM
 546
 547 18 char        OBSOLETE (was Chase serial card - alternate devices)
 548                  0 = /dev/cuh0         Callout device for ttyH0
 549                  1 = /dev/cuh1         Callout device for ttyH1
 550                    ...
 551 18 block       Sanyo CD-ROM
 552                  0 = /dev/sjcd         Sanyo CD-ROM
 553
 554 19 char        Cyclades serial card
 555                  0 = /dev/ttyC0        First Cyclades port
 556                    ...
 557                 31 = /dev/ttyC31       32nd Cyclades port
 558
 559 19 block       "Double" compressed disk
 560                  0 = /dev/double0      First compressed disk
 561                    ...
 562                  7 = /dev/double7      Eighth compressed disk
 563                128 = /dev/cdouble0     Mirror of first compressed disk
 564                    ...
 565                135 = /dev/cdouble7     Mirror of eighth compressed disk
 566
 567                See the Double documentation for the meaning of the
 568                mirror devices.
 569
 570 20 char        Cyclades serial card - alternate devices
 571                  0 = /dev/cub0         Callout device for ttyC0
 572                    ...
 573                 31 = /dev/cub31        Callout device for ttyC31
 574
 575 20 block       Hitachi CD-ROM (under development)
 576                  0 = /dev/hitcd        Hitachi CD-ROM
 577
 578 21 char        Generic SCSI access
 579                  0 = /dev/sg0          First generic SCSI device
 580                  1 = /dev/sg1          Second generic SCSI device
 581                    ...
 582
 583                Most distributions name these /dev/sga, /dev/sgb...;
 584                this sets an unnecessary limit of 26 SCSI devices in
 585                the system and is counter to standard Linux
 586                device-naming practice.
 587
 588 21 block       Acorn MFM hard drive interface
 589                  0 = /dev/mfma         First MFM drive whole disk
 590                 64 = /dev/mfmb         Second MFM drive whole disk
 591
 592                This device is used on the ARM-based Acorn RiscPC.
 593                Partitions are handled the same way as for IDE disks
 594                (see major number 3).
 595
 596 22 char        Digiboard serial card
 597                  0 = /dev/ttyD0        First Digiboard port
 598                  1 = /dev/ttyD1        Second Digiboard port
 599                    ...
 600 22 block       Second IDE hard disk/CD-ROM interface
 601                  0 = /dev/hdc          Master: whole disk (or CD-ROM)
 602                 64 = /dev/hdd          Slave: whole disk (or CD-ROM)
 603
 604                Partitions are handled the same way as for the first
 605                interface (see major number 3).
 606
 607 23 char        Digiboard serial card - alternate devices
 608                  0 = /dev/cud0         Callout device for ttyD0
 609                  1 = /dev/cud1         Callout device for ttyD1
 610                      ...
 611 23 block       Mitsumi proprietary CD-ROM
 612                  0 = /dev/mcd          Mitsumi CD-ROM
 613
 614 24 char        Stallion serial card
 615                  0 = /dev/ttyE0        Stallion port 0 card 0
 616                  1 = /dev/ttyE1        Stallion port 1 card 0
 617                    ...
 618                 64 = /dev/ttyE64       Stallion port 0 card 1
 619                 65 = /dev/ttyE65       Stallion port 1 card 1
 620                      ...
 621                128 = /dev/ttyE128      Stallion port 0 card 2
 622                129 = /dev/ttyE129      Stallion port 1 card 2
 623                    ...
 624                192 = /dev/ttyE192      Stallion port 0 card 3
 625                193 = /dev/ttyE193      Stallion port 1 card 3
 626                    ...
 627 24 block       Sony CDU-535 CD-ROM
 628                  0 = /dev/cdu535       Sony CDU-535 CD-ROM
 629
 630 25 char        Stallion serial card - alternate devices
 631                  0 = /dev/cue0         Callout device for ttyE0
 632                  1 = /dev/cue1         Callout device for ttyE1
 633                    ...
 634                 64 = /dev/cue64        Callout device for ttyE64
 635                 65 = /dev/cue65        Callout device for ttyE65
 636                    ...
 637                128 = /dev/cue128       Callout device for ttyE128
 638                129 = /dev/cue129       Callout device for ttyE129
 639                    ...
 640                192 = /dev/cue192       Callout device for ttyE192
 641                193 = /dev/cue193       Callout device for ttyE193
 642                      ...
 643 25 block       First Matsushita (Panasonic/SoundBlaster) CD-ROM
 644                  0 = /dev/sbpcd0       Panasonic CD-ROM controller 0 unit 0
 645                  1 = /dev/sbpcd1       Panasonic CD-ROM controller 0 unit 1
 646                  2 = /dev/sbpcd2       Panasonic CD-ROM controller 0 unit 2
 647                  3 = /dev/sbpcd3       Panasonic CD-ROM controller 0 unit 3
 648
 649 26 char
 650
 651 26 block       Second Matsushita (Panasonic/SoundBlaster) CD-ROM
 652                  0 = /dev/sbpcd4       Panasonic CD-ROM controller 1 unit 0
 653                  1 = /dev/sbpcd5       Panasonic CD-ROM controller 1 unit 1
 654                  2 = /dev/sbpcd6       Panasonic CD-ROM controller 1 unit 2
 655                  3 = /dev/sbpcd7       Panasonic CD-ROM controller 1 unit 3
 656
 657 27 char        QIC-117 tape
 658                  0 = /dev/qft0         Unit 0, rewind-on-close
 659                  1 = /dev/qft1         Unit 1, rewind-on-close
 660                  2 = /dev/qft2         Unit 2, rewind-on-close
 661                  3 = /dev/qft3         Unit 3, rewind-on-close
 662                  4 = /dev/nqft0        Unit 0, no rewind-on-close
 663                  5 = /dev/nqft1        Unit 1, no rewind-on-close
 664                  6 = /dev/nqft2        Unit 2, no rewind-on-close
 665                  7 = /dev/nqft3        Unit 3, no rewind-on-close
 666                 16 = /dev/zqft0        Unit 0, rewind-on-close, compression
 667                 17 = /dev/zqft1        Unit 1, rewind-on-close, compression
 668                 18 = /dev/zqft2        Unit 2, rewind-on-close, compression
 669                 19 = /dev/zqft3        Unit 3, rewind-on-close, compression
 670                 20 = /dev/nzqft0       Unit 0, no rewind-on-close, compression
 671                 21 = /dev/nzqft1       Unit 1, no rewind-on-close, compression
 672                 22 = /dev/nzqft2       Unit 2, no rewind-on-close, compression
 673                 23 = /dev/nzqft3       Unit 3, no rewind-on-close, compression
 674                 32 = /dev/rawqft0      Unit 0, rewind-on-close, no file marks
 675                 33 = /dev/rawqft1      Unit 1, rewind-on-close, no file marks
 676                 34 = /dev/rawqft2      Unit 2, rewind-on-close, no file marks
 677                 35 = /dev/rawqft3      Unit 3, rewind-on-close, no file marks
 678                 36 = /dev/nrawqft0     Unit 0, no rewind-on-close, no file marks
 679                 37 = /dev/nrawqft1     Unit 1, no rewind-on-close, no file marks
 680                 38 = /dev/nrawqft2     Unit 2, no rewind-on-close, no file marks
 681                 39 = /dev/nrawqft3     Unit 3, no rewind-on-close, no file marks
 682
 683 27 block       Third Matsushita (Panasonic/SoundBlaster) CD-ROM
 684                  0 = /dev/sbpcd8       Panasonic CD-ROM controller 2 unit 0
 685                  1 = /dev/sbpcd9       Panasonic CD-ROM controller 2 unit 1
 686                  2 = /dev/sbpcd10      Panasonic CD-ROM controller 2 unit 2
 687                  3 = /dev/sbpcd11      Panasonic CD-ROM controller 2 unit 3
 688
 689 28 char        Stallion serial card - card programming
 690                  0 = /dev/staliomem0   First Stallion card I/O memory
 691                  1 = /dev/staliomem1   Second Stallion card I/O memory
 692                  2 = /dev/staliomem2   Third Stallion card I/O memory
 693                  3 = /dev/staliomem3   Fourth Stallion card I/O memory
 694
 695 28 char        Atari SLM ACSI laser printer (68k/Atari)
 696                  0 = /dev/slm0         First SLM laser printer
 697                  1 = /dev/slm1         Second SLM laser printer
 698                    ...
 699 28 block       Fourth Matsushita (Panasonic/SoundBlaster) CD-ROM
 700                  0 = /dev/sbpcd12      Panasonic CD-ROM controller 3 unit 0
 701                  1 = /dev/sbpcd13      Panasonic CD-ROM controller 3 unit 1
 702                  2 = /dev/sbpcd14      Panasonic CD-ROM controller 3 unit 2
 703                  3 = /dev/sbpcd15      Panasonic CD-ROM controller 3 unit 3
 704
 705 28 block       ACSI disk (68k/Atari)
 706                  0 = /dev/ada          First ACSI disk whole disk
 707                 16 = /dev/adb          Second ACSI disk whole disk
 708                 32 = /dev/adc          Third ACSI disk whole disk
 709                    ...
 710                240 = /dev/adp          16th ACSI disk whole disk
 711
 712                Partitions are handled in the same way as for IDE
 713                disks (see major number 3) except that the limit on
 714                partitions is 15, like SCSI.
 715
 716 29 char        Universal frame buffer
 717                  0 = /dev/fb0          First frame buffer
 718                  1 = /dev/fb1          Second frame buffer
 719                    ...
 720                 31 = /dev/fb31         32nd frame buffer
 721
 722 29 block       Aztech/Orchid/Okano/Wearnes CD-ROM
 723                  0 = /dev/aztcd        Aztech CD-ROM
 724
 725 30 char        iBCS-2 compatibility devices
 726                  0 = /dev/socksys      Socket access
 727                  1 = /dev/spx          SVR3 local X interface
 728                 32 = /dev/inet/ip      Network access
 729                 33 = /dev/inet/icmp
 730                 34 = /dev/inet/ggp
 731                 35 = /dev/inet/ipip
 732                 36 = /dev/inet/tcp
 733                 37 = /dev/inet/egp
 734                 38 = /dev/inet/pup
 735                 39 = /dev/inet/udp
 736                 40 = /dev/inet/idp
 737                 41 = /dev/inet/rawip
 738
 739                Additionally, iBCS-2 requires the following links:
 740
 741                /dev/ip -> /dev/inet/ip
 742                /dev/icmp -> /dev/inet/icmp
 743                /dev/ggp -> /dev/inet/ggp
 744                /dev/ipip -> /dev/inet/ipip
 745                /dev/tcp -> /dev/inet/tcp
 746                /dev/egp -> /dev/inet/egp
 747                /dev/pup -> /dev/inet/pup
 748                /dev/udp -> /dev/inet/udp
 749                /dev/idp -> /dev/inet/idp
 750                /dev/rawip -> /dev/inet/rawip
 751                /dev/inet/arp -> /dev/inet/udp
 752                /dev/inet/rip -> /dev/inet/udp
 753                /dev/nfsd -> /dev/socksys
 754                /dev/X0R -> /dev/null (? apparently not required ?)
 755
 756 30 block       Philips LMS CM-205 CD-ROM
 757                  0 = /dev/cm205cd      Philips LMS CM-205 CD-ROM
 758
 759                /dev/lmscd is an older name for this device.  This
 760                driver does not work with the CM-205MS CD-ROM.
 761
 762 31 char        MPU-401 MIDI
 763                  0 = /dev/mpu401data   MPU-401 data port
 764                  1 = /dev/mpu401stat   MPU-401 status port
 765
 766 31 block       ROM/flash memory card
 767                  0 = /dev/rom0         First ROM card (rw)
 768                      ...
 769                  7 = /dev/rom7         Eighth ROM card (rw)
 770                  8 = /dev/rrom0        First ROM card (ro)
 771                    ...
 772                 15 = /dev/rrom7        Eighth ROM card (ro)
 773                 16 = /dev/flash0       First flash memory card (rw)
 774                    ...
 775                 23 = /dev/flash7       Eighth flash memory card (rw)
 776                 24 = /dev/rflash0      First flash memory card (ro)
 777                    ...
 778                 31 = /dev/rflash7      Eighth flash memory card (ro)
 779
 780                The read-write (rw) devices support back-caching
 781                written data in RAM, as well as writing to flash RAM
 782                devices.  The read-only devices (ro) support reading
 783                only.
 784
 785 32 char        Specialix serial card
 786                  0 = /dev/ttyX0        First Specialix port
 787                  1 = /dev/ttyX1        Second Specialix port
 788                    ...
 789 32 block       Philips LMS CM-206 CD-ROM
 790                  0 = /dev/cm206cd      Philips LMS CM-206 CD-ROM
 791
 792 33 char        Specialix serial card - alternate devices
 793                  0 = /dev/cux0         Callout device for ttyX0
 794                  1 = /dev/cux1         Callout device for ttyX1
 795                    ...
 796 33 block       Third IDE hard disk/CD-ROM interface
 797                  0 = /dev/hde          Master: whole disk (or CD-ROM)
 798                 64 = /dev/hdf          Slave: whole disk (or CD-ROM)
 799
 800                Partitions are handled the same way as for the first
 801                interface (see major number 3).
 802
 803 34 char        Z8530 HDLC driver
 804                  0 = /dev/scc0         First Z8530, first port
 805                  1 = /dev/scc1         First Z8530, second port
 806                  2 = /dev/scc2         Second Z8530, first port
 807                  3 = /dev/scc3         Second Z8530, second port
 808                    ...
 809
 810                In a previous version these devices were named
 811                /dev/sc1 for /dev/scc0, /dev/sc2 for /dev/scc1, and so
 812                on.
 813
 814 34 block       Fourth IDE hard disk/CD-ROM interface
 815                  0 = /dev/hdg          Master: whole disk (or CD-ROM)
 816                 64 = /dev/hdh          Slave: whole disk (or CD-ROM)
 817
 818                Partitions are handled the same way as for the first
 819                interface (see major number 3).
 820
 821 35 char        tclmidi MIDI driver
 822                  0 = /dev/midi0        First MIDI port, kernel timed
 823                  1 = /dev/midi1        Second MIDI port, kernel timed
 824                  2 = /dev/midi2        Third MIDI port, kernel timed
 825                  3 = /dev/midi3        Fourth MIDI port, kernel timed
 826                 64 = /dev/rmidi0       First MIDI port, untimed
 827                 65 = /dev/rmidi1       Second MIDI port, untimed
 828                 66 = /dev/rmidi2       Third MIDI port, untimed
 829                 67 = /dev/rmidi3       Fourth MIDI port, untimed
 830                128 = /dev/smpte0       First MIDI port, SMPTE timed
 831                129 = /dev/smpte1       Second MIDI port, SMPTE timed
 832                130 = /dev/smpte2       Third MIDI port, SMPTE timed
 833                131 = /dev/smpte3       Fourth MIDI port, SMPTE timed
 834
 835 35 block       Slow memory ramdisk
 836                  0 = /dev/slram        Slow memory ramdisk
 837
 838 36 char        Netlink support
 839                  0 = /dev/route        Routing, device updates, kernel to user
 840                  1 = /dev/skip         enSKIP security cache control
 841                  3 = /dev/fwmonitor    Firewall packet copies
 842                 16 = /dev/tap0         First Ethertap device
 843                    ...
 844                 31 = /dev/tap15        16th Ethertap device
 845
 846 36 block       MCA ESDI hard disk
 847                  0 = /dev/eda          First ESDI disk whole disk
 848                 64 = /dev/edb          Second ESDI disk whole disk
 849                    ...
 850
 851                Partitions are handled in the same way as IDE disks
 852                (see major number 3).
 853
 854 37 char        IDE tape
 855                  0 = /dev/ht0          First IDE tape
 856                  1 = /dev/ht1          Second IDE tape
 857                    ...
 858                128 = /dev/nht0         First IDE tape, no rewind-on-close
 859                129 = /dev/nht1         Second IDE tape, no rewind-on-close
 860                    ...
 861
 862                Currently, only one IDE tape drive is supported.
 863
 864 37 block       Zorro II ramdisk
 865                  0 = /dev/z2ram        Zorro II ramdisk
 866
 867 38 char        Myricom PCI Myrinet board
 868                  0 = /dev/mlanai0      First Myrinet board
 869                  1 = /dev/mlanai1      Second Myrinet board
 870                    ...
 871
 872                This device is used for status query, board control
 873                and "user level packet I/O."  This board is also
 874                accessible as a standard networking "eth" device.
 875
 876 38 block       OBSOLETE (was Linux/AP+)
 877
 878 39 char        ML-16P experimental I/O board
 879                  0 = /dev/ml16pa-a0    First card, first analog channel
 880                  1 = /dev/ml16pa-a1    First card, second analog channel
 881                    ...
 882                 15 = /dev/ml16pa-a15   First card, 16th analog channel
 883                 16 = /dev/ml16pa-d     First card, digital lines
 884                 17 = /dev/ml16pa-c0    First card, first counter/timer
 885                 18 = /dev/ml16pa-c1    First card, second counter/timer
 886                 19 = /dev/ml16pa-c2    First card, third counter/timer
 887                 32 = /dev/ml16pb-a0    Second card, first analog channel
 888                 33 = /dev/ml16pb-a1    Second card, second analog channel
 889                    ...
 890                 47 = /dev/ml16pb-a15   Second card, 16th analog channel
 891                 48 = /dev/ml16pb-d     Second card, digital lines
 892                 49 = /dev/ml16pb-c0    Second card, first counter/timer
 893                 50 = /dev/ml16pb-c1    Second card, second counter/timer
 894                 51 = /dev/ml16pb-c2    Second card, third counter/timer
 895                      ...
 896 39 block
 897
 898 40 char
 899
 900 40 block
 901
 902 41 char        Yet Another Micro Monitor
 903                  0 = /dev/yamm         Yet Another Micro Monitor
 904
 905 41 block
 906
 907 42 char        Demo/sample use
 908
 909 42 block       Demo/sample use
 910
 911                This number is intended for use in sample code, as
 912                well as a general "example" device number.  It
 913                should never be used for a device driver that is being
 914                distributed; either obtain an official number or use
 915                the local/experimental range.  The sudden addition or
 916                removal of a driver with this number should not cause
 917                ill effects to the system (bugs excepted.)
 918
 919                IN PARTICULAR, ANY DISTRIBUTION WHICH CONTAINS A
 920                DEVICE DRIVER USING MAJOR NUMBER 42 IS NONCOMPLIANT.
 921
 922 43 char        isdn4linux virtual modem
 923                  0 = /dev/ttyI0        First virtual modem
 924                    ...
 925                 63 = /dev/ttyI63       64th virtual modem
 926
 927 43 block       Network block devices
 928                  0 = /dev/nb0          First network block device
 929                  1 = /dev/nb1          Second network block device
 930                    ...
 931
 932                Network Block Device is somehow similar to loopback
 933                devices: If you read from it, it sends packet across
 934                network asking server for data. If you write to it, it
 935                sends packet telling server to write. It could be used
 936                to mounting filesystems over the net, swapping over
 937                the net, implementing block device in userland etc.
 938
 939 44 char        isdn4linux virtual modem - alternate devices
 940                  0 = /dev/cui0         Callout device for ttyI0
 941                    ...
 942                 63 = /dev/cui63        Callout device for ttyI63
 943
 944 44 block       Flash Translation Layer (FTL) filesystems
 945                  0 = /dev/ftla         FTL on first Memory Technology Device
 946                 16 = /dev/ftlb         FTL on second Memory Technology Device
 947                 32 = /dev/ftlc         FTL on third Memory Technology Device
 948                    ...
 949                240 = /dev/ftlp         FTL on 16th Memory Technology Device
 950
 951                Partitions are handled in the same way as for IDE
 952                disks (see major number 3) except that the partition
 953                limit is 15 rather than 63 per disk (same as SCSI.)
 954
 955 45 char        isdn4linux ISDN BRI driver
 956                  0 = /dev/isdn0        First virtual B channel raw data
 957                    ...
 958                 63 = /dev/isdn63       64th virtual B channel raw data
 959                 64 = /dev/isdnctrl0    First channel control/debug
 960                    ...
 961                127 = /dev/isdnctrl63   64th channel control/debug
 962
 963                128 = /dev/ippp0        First SyncPPP device
 964                    ...
 965                191 = /dev/ippp63       64th SyncPPP device
 966
 967                255 = /dev/isdninfo     ISDN monitor interface
 968
 969 45 block       Parallel port IDE disk devices
 970                  0 = /dev/pda          First parallel port IDE disk
 971                 16 = /dev/pdb          Second parallel port IDE disk
 972                 32 = /dev/pdc          Third parallel port IDE disk
 973                 48 = /dev/pdd          Fourth parallel port IDE disk
 974
 975                Partitions are handled in the same way as for IDE
 976                disks (see major number 3) except that the partition
 977                limit is 15 rather than 63 per disk.
 978
 979 46 char        Comtrol Rocketport serial card
 980                  0 = /dev/ttyR0        First Rocketport port
 981                  1 = /dev/ttyR1        Second Rocketport port
 982                    ...
 983 46 block       Parallel port ATAPI CD-ROM devices
 984                  0 = /dev/pcd0         First parallel port ATAPI CD-ROM
 985                  1 = /dev/pcd1         Second parallel port ATAPI CD-ROM
 986                  2 = /dev/pcd2         Third parallel port ATAPI CD-ROM
 987                  3 = /dev/pcd3         Fourth parallel port ATAPI CD-ROM
 988
 989 47 char        Comtrol Rocketport serial card - alternate devices
 990                  0 = /dev/cur0         Callout device for ttyR0
 991                  1 = /dev/cur1         Callout device for ttyR1
 992                    ...
 993 47 block       Parallel port ATAPI disk devices
 994                  0 = /dev/pf0          First parallel port ATAPI disk
 995                  1 = /dev/pf1          Second parallel port ATAPI disk
 996                  2 = /dev/pf2          Third parallel port ATAPI disk
 997                  3 = /dev/pf3          Fourth parallel port ATAPI disk
 998
 999                This driver is intended for floppy disks and similar
1000                devices and hence does not support partitioning.
1001
1002 48 char        SDL RISCom serial card
1003                  0 = /dev/ttyL0        First RISCom port
1004                  1 = /dev/ttyL1        Second RISCom port
1005                    ...
1006 48 block       Mylex DAC960 PCI RAID controller; first controller
1007                  0 = /dev/rd/c0d0      First disk, whole disk
1008                  8 = /dev/rd/c0d1      Second disk, whole disk
1009                    ...
1010                248 = /dev/rd/c0d31     32nd disk, whole disk
1011
1012                For partitions add:
1013                  0 = /dev/rd/c?d?      Whole disk
1014                  1 = /dev/rd/c?d?p1    First partition
1015                    ...
1016                  7 = /dev/rd/c?d?p7    Seventh partition
1017
1018 49 char        SDL RISCom serial card - alternate devices
1019                  0 = /dev/cul0         Callout device for ttyL0
1020                  1 = /dev/cul1         Callout device for ttyL1
1021                    ...
1022 49 block       Mylex DAC960 PCI RAID controller; second controller
1023                  0 = /dev/rd/c1d0      First disk, whole disk
1024                  8 = /dev/rd/c1d1      Second disk, whole disk
1025                    ...
1026                248 = /dev/rd/c1d31     32nd disk, whole disk
1027
1028                Partitions are handled as for major 48.
1029
1030 50 char        Reserved for GLINT
1031
1032 50 block       Mylex DAC960 PCI RAID controller; third controller
1033                  0 = /dev/rd/c2d0      First disk, whole disk
1034                  8 = /dev/rd/c2d1      Second disk, whole disk
1035                    ...
1036                248 = /dev/rd/c2d31     32nd disk, whole disk
1037
1038 51 char        Baycom radio modem OR Radio Tech BIM-XXX-RS232 radio modem
1039                  0 = /dev/bc0          First Baycom radio modem
1040                  1 = /dev/bc1          Second Baycom radio modem
1041                    ...
1042 51 block       Mylex DAC960 PCI RAID controller; fourth controller
1043                  0 = /dev/rd/c3d0      First disk, whole disk
1044                  8 = /dev/rd/c3d1      Second disk, whole disk
1045                    ...
1046                248 = /dev/rd/c3d31     32nd disk, whole disk
1047
1048                Partitions are handled as for major 48.
1049
1050 52 char        Spellcaster DataComm/BRI ISDN card
1051                  0 = /dev/dcbri0       First DataComm card
1052                  1 = /dev/dcbri1       Second DataComm card
1053                  2 = /dev/dcbri2       Third DataComm card
1054                  3 = /dev/dcbri3       Fourth DataComm card
1055
1056 52 block       Mylex DAC960 PCI RAID controller; fifth controller
1057                  0 = /dev/rd/c4d0      First disk, whole disk
1058                  8 = /dev/rd/c4d1      Second disk, whole disk
1059                    ...
1060                248 = /dev/rd/c4d31     32nd disk, whole disk
1061
1062                Partitions are handled as for major 48.
1063
1064 53 char        BDM interface for remote debugging MC683xx microcontrollers
1065                  0 = /dev/pd_bdm0      PD BDM interface on lp0
1066                  1 = /dev/pd_bdm1      PD BDM interface on lp1
1067                  2 = /dev/pd_bdm2      PD BDM interface on lp2
1068                  4 = /dev/icd_bdm0     ICD BDM interface on lp0
1069                  5 = /dev/icd_bdm1     ICD BDM interface on lp1
1070                  6 = /dev/icd_bdm2     ICD BDM interface on lp2
1071
1072                This device is used for the interfacing to the MC683xx
1073                microcontrollers via Background Debug Mode by use of a
1074                Parallel Port interface. PD is the Motorola Public
1075                Domain Interface and ICD is the commercial interface
1076                by P&E.
1077
1078 53 block       Mylex DAC960 PCI RAID controller; sixth controller
1079                  0 = /dev/rd/c5d0      First disk, whole disk
1080                  8 = /dev/rd/c5d1      Second disk, whole disk
1081                    ...
1082                248 = /dev/rd/c5d31     32nd disk, whole disk
1083
1084                Partitions are handled as for major 48.
1085
1086 54 char        Electrocardiognosis Holter serial card
1087                  0 = /dev/holter0      First Holter port
1088                  1 = /dev/holter1      Second Holter port
1089                  2 = /dev/holter2      Third Holter port
1090
1091                A custom serial card used by Electrocardiognosis SRL
1092                <mseritan@ottonel.pub.ro> to transfer data from Holter
1093                24-hour heart monitoring equipment.
1094
1095 54 block       Mylex DAC960 PCI RAID controller; seventh controller
1096                  0 = /dev/rd/c6d0      First disk, whole disk
1097                  8 = /dev/rd/c6d1      Second disk, whole disk
1098                    ...
1099                248 = /dev/rd/c6d31     32nd disk, whole disk
1100
1101                Partitions are handled as for major 48.
1102
1103 55 char        DSP56001 digital signal processor
1104                  0 = /dev/dsp56k       First DSP56001
1105
1106 55 block       Mylex DAC960 PCI RAID controller; eighth controller
1107                  0 = /dev/rd/c7d0      First disk, whole disk
1108                  8 = /dev/rd/c7d1      Second disk, whole disk
1109                    ...
1110                248 = /dev/rd/c7d31     32nd disk, whole disk
1111
1112                Partitions are handled as for major 48.
1113
1114 56 char        Apple Desktop Bus
1115                  0 = /dev/adb          ADB bus control
1116
1117                Additional devices will be added to this number, all
1118                starting with /dev/adb.
1119
1120 56 block       Fifth IDE hard disk/CD-ROM interface
1121                  0 = /dev/hdi          Master: whole disk (or CD-ROM)
1122                 64 = /dev/hdj          Slave: whole disk (or CD-ROM)
1123
1124                Partitions are handled the same way as for the first
1125                interface (see major number 3).
1126
1127 57 char        Hayes ESP serial card
1128                  0 = /dev/ttyP0        First ESP port
1129                  1 = /dev/ttyP1        Second ESP port
1130                    ...
1131
1132 57 block       Sixth IDE hard disk/CD-ROM interface
1133                  0 = /dev/hdk          Master: whole disk (or CD-ROM)
1134                 64 = /dev/hdl          Slave: whole disk (or CD-ROM)
1135
1136                Partitions are handled the same way as for the first
1137                interface (see major number 3).
1138
1139 58 char        Hayes ESP serial card - alternate devices
1140                  0 = /dev/cup0         Callout device for ttyP0
1141                  1 = /dev/cup1         Callout device for ttyP1
1142                    ...
1143
1144 58 block       Reserved for logical volume manager
1145
1146 59 char        sf firewall package
1147                  0 = /dev/firewall     Communication with sf kernel module
1148
1149 59 block       Generic PDA filesystem device
1150                  0 = /dev/pda0         First PDA device
1151                  1 = /dev/pda1         Second PDA device
1152                    ...
1153
1154                The pda devices are used to mount filesystems on
1155                remote pda's (basically slow handheld machines with
1156                proprietary OS's and limited memory and storage
1157                running small fs translation drivers) through serial /
1158                IRDA / parallel links.
1159
1160                NAMING CONFLICT -- PROPOSED REVISED NAME /dev/rpda0 etc
1161
1162 60-63 char     LOCAL/EXPERIMENTAL USE
1163
1164 60-63 block    LOCAL/EXPERIMENTAL USE
1165                Allocated for local/experimental use.  For devices not
1166                assigned official numbers, these ranges should be
1167                used in order to avoid conflicting with future assignments.
1168
1169 64 char        ENskip kernel encryption package
1170                  0 = /dev/enskip       Communication with ENskip kernel module
1171
1172 64 block       Scramdisk/DriveCrypt encrypted devices
1173                  0 = /dev/scramdisk/master    Master node for ioctls
1174                  1 = /dev/scramdisk/1         First encrypted device
1175                  2 = /dev/scramdisk/2         Second encrypted device
1176                  ...
1177                255 = /dev/scramdisk/255       255th encrypted device
1178
1179                The filename of the encrypted container and the passwords
1180                are sent via ioctls (using the sdmount tool) to the master
1181                node which then activates them via one of the
1182                /dev/scramdisk/x nodes for loop mounting (all handled
1183                through the sdmount tool).
1184
1185                Requested by: andy@scramdisklinux.org
1186
1187 65 char        Sundance "plink" Transputer boards (obsolete, unused)
1188                  0 = /dev/plink0       First plink device
1189                  1 = /dev/plink1       Second plink device
1190                  2 = /dev/plink2       Third plink device
1191                  3 = /dev/plink3       Fourth plink device
1192                 64 = /dev/rplink0      First plink device, raw
1193                 65 = /dev/rplink1      Second plink device, raw
1194                 66 = /dev/rplink2      Third plink device, raw
1195                 67 = /dev/rplink3      Fourth plink device, raw
1196                128 = /dev/plink0d      First plink device, debug
1197                129 = /dev/plink1d      Second plink device, debug
1198                130 = /dev/plink2d      Third plink device, debug
1199                131 = /dev/plink3d      Fourth plink device, debug
1200                192 = /dev/rplink0d     First plink device, raw, debug
1201                193 = /dev/rplink1d     Second plink device, raw, debug
1202                194 = /dev/rplink2d     Third plink device, raw, debug
1203                195 = /dev/rplink3d     Fourth plink device, raw, debug
1204
1205                This is a commercial driver; contact James Howes
1206                <jth@prosig.demon.co.uk> for information.
1207
1208 65 block       SCSI disk devices (16-31)
1209                  0 = /dev/sdq          17th SCSI disk whole disk
1210                 16 = /dev/sdr          18th SCSI disk whole disk
1211                 32 = /dev/sds          19th SCSI disk whole disk
1212                    ...
1213                240 = /dev/sdaf         32nd SCSI disk whole disk
1214
1215                Partitions are handled in the same way as for IDE
1216                disks (see major number 3) except that the limit on
1217                partitions is 15.
1218
1219 66 char        YARC PowerPC PCI coprocessor card
1220                  0 = /dev/yppcpci0     First YARC card
1221                  1 = /dev/yppcpci1     Second YARC card
1222                    ...
1223
1224 66 block       SCSI disk devices (32-47)
1225                  0 = /dev/sdag         33th SCSI disk whole disk
1226                 16 = /dev/sdah         34th SCSI disk whole disk
1227                 32 = /dev/sdai         35th SCSI disk whole disk
1228                    ...
1229                240 = /dev/sdav         48nd SCSI disk whole disk
1230
1231                Partitions are handled in the same way as for IDE
1232                disks (see major number 3) except that the limit on
1233                partitions is 15.
1234
1235 67 char        Coda network file system
1236                  0 = /dev/cfs0         Coda cache manager
1237
1238                See http://www.coda.cs.cmu.edu for information about Coda.
1239
1240 67 block       SCSI disk devices (48-63)
1241                  0 = /dev/sdaw         49th SCSI disk whole disk
1242                 16 = /dev/sdax         50th SCSI disk whole disk
1243                 32 = /dev/sday         51st SCSI disk whole disk
1244                    ...
1245                240 = /dev/sdbl         64th SCSI disk whole disk
1246
1247                Partitions are handled in the same way as for IDE
1248                disks (see major number 3) except that the limit on
1249                partitions is 15.
1250
1251 68 char        CAPI 2.0 interface
1252                  0 = /dev/capi20       Control device
1253                  1 = /dev/capi20.00    First CAPI 2.0 application
1254                  2 = /dev/capi20.01    Second CAPI 2.0 application
1255                    ...
1256                 20 = /dev/capi20.19    19th CAPI 2.0 application
1257
1258                ISDN CAPI 2.0 driver for use with CAPI 2.0
1259                applications; currently supports the AVM B1 card.
1260
1261 68 block       SCSI disk devices (64-79)
1262                  0 = /dev/sdbm         65th SCSI disk whole disk
1263                 16 = /dev/sdbn         66th SCSI disk whole disk
1264                 32 = /dev/sdbo         67th SCSI disk whole disk
1265                    ...
1266                240 = /dev/sdcb         80th SCSI disk whole disk
1267
1268                Partitions are handled in the same way as for IDE
1269                disks (see major number 3) except that the limit on
1270                partitions is 15.
1271
1272 69 char        MA16 numeric accelerator card
1273                  0 = /dev/ma16         Board memory access
1274
1275 69 block       SCSI disk devices (80-95)
1276                  0 = /dev/sdcc         81st SCSI disk whole disk
1277                 16 = /dev/sdcd         82nd SCSI disk whole disk
1278                 32 = /dev/sdce         83th SCSI disk whole disk
1279                    ...
1280                240 = /dev/sdcr         96th SCSI disk whole disk
1281
1282                Partitions are handled in the same way as for IDE
1283                disks (see major number 3) except that the limit on
1284                partitions is 15.
1285
1286 70 char        SpellCaster Protocol Services Interface
1287                  0 = /dev/apscfg       Configuration interface
1288                  1 = /dev/apsauth      Authentication interface
1289                  2 = /dev/apslog       Logging interface
1290                  3 = /dev/apsdbg       Debugging interface
1291                 64 = /dev/apsisdn      ISDN command interface
1292                 65 = /dev/apsasync     Async command interface
1293                128 = /dev/apsmon       Monitor interface
1294
1295 70 block       SCSI disk devices (96-111)
1296                  0 = /dev/sdcs         97th SCSI disk whole disk
1297                 16 = /dev/sdct         98th SCSI disk whole disk
1298                 32 = /dev/sdcu         99th SCSI disk whole disk
1299                    ...
1300                240 = /dev/sddh         112nd SCSI disk whole disk
1301
1302                Partitions are handled in the same way as for IDE
1303                disks (see major number 3) except that the limit on
1304                partitions is 15.
1305
1306 71 char        Computone IntelliPort II serial card
1307                  0 = /dev/ttyF0        IntelliPort II board 0, port 0
1308                  1 = /dev/ttyF1        IntelliPort II board 0, port 1
1309                    ...
1310                 63 = /dev/ttyF63       IntelliPort II board 0, port 63
1311                 64 = /dev/ttyF64       IntelliPort II board 1, port 0
1312                 65 = /dev/ttyF65       IntelliPort II board 1, port 1
1313                    ...
1314                127 = /dev/ttyF127      IntelliPort II board 1, port 63
1315                128 = /dev/ttyF128      IntelliPort II board 2, port 0
1316                129 = /dev/ttyF129      IntelliPort II board 2, port 1
1317                    ...
1318                191 = /dev/ttyF191      IntelliPort II board 2, port 63
1319                192 = /dev/ttyF192      IntelliPort II board 3, port 0
1320                193 = /dev/ttyF193      IntelliPort II board 3, port 1
1321                    ...
1322                255 = /dev/ttyF255      IntelliPort II board 3, port 63
1323
1324 71 block       SCSI disk devices (112-127)
1325                  0 = /dev/sddi         113th SCSI disk whole disk
1326                 16 = /dev/sddj         114th SCSI disk whole disk
1327                 32 = /dev/sddk         115th SCSI disk whole disk
1328                    ...
1329                240 = /dev/sddx         128th SCSI disk whole disk
1330
1331                Partitions are handled in the same way as for IDE
1332                disks (see major number 3) except that the limit on
1333                partitions is 15.
1334
1335 72 char        Computone IntelliPort II serial card - alternate devices
1336                  0 = /dev/cuf0         Callout device for ttyF0
1337                  1 = /dev/cuf1         Callout device for ttyF1
1338                    ...
1339                 63 = /dev/cuf63        Callout device for ttyF63
1340                 64 = /dev/cuf64        Callout device for ttyF64
1341                 65 = /dev/cuf65        Callout device for ttyF65
1342                    ...
1343                127 = /dev/cuf127       Callout device for ttyF127
1344                128 = /dev/cuf128       Callout device for ttyF128
1345                129 = /dev/cuf129       Callout device for ttyF129
1346                    ...
1347                191 = /dev/cuf191       Callout device for ttyF191
1348                192 = /dev/cuf192       Callout device for ttyF192
1349                193 = /dev/cuf193       Callout device for ttyF193
1350                    ...
1351                255 = /dev/cuf255       Callout device for ttyF255
1352
1353 72 block       Compaq Intelligent Drive Array, first controller
1354                  0 = /dev/ida/c0d0     First logical drive whole disk
1355                 16 = /dev/ida/c0d1     Second logical drive whole disk
1356                    ...
1357                240 = /dev/ida/c0d15    16th logical drive whole disk
1358
1359                Partitions are handled the same way as for Mylex
1360                DAC960 (see major number 48) except that the limit on
1361                partitions is 15.
1362
1363 73 char        Computone IntelliPort II serial card - control devices
1364                  0 = /dev/ip2ipl0      Loadware device for board 0
1365                  1 = /dev/ip2stat0     Status device for board 0
1366                  4 = /dev/ip2ipl1      Loadware device for board 1
1367                  5 = /dev/ip2stat1     Status device for board 1
1368                  8 = /dev/ip2ipl2      Loadware device for board 2
1369                  9 = /dev/ip2stat2     Status device for board 2
1370                 12 = /dev/ip2ipl3      Loadware device for board 3
1371                 13 = /dev/ip2stat3     Status device for board 3
1372
1373 73 block       Compaq Intelligent Drive Array, second controller
1374                  0 = /dev/ida/c1d0     First logical drive whole disk
1375                 16 = /dev/ida/c1d1     Second logical drive whole disk
1376                    ...
1377                240 = /dev/ida/c1d15    16th logical drive whole disk
1378
1379                Partitions are handled the same way as for Mylex
1380                DAC960 (see major number 48) except that the limit on
1381                partitions is 15.
1382
1383 74 char        SCI bridge
1384                  0 = /dev/SCI/0        SCI device 0
1385                  1 = /dev/SCI/1        SCI device 1
1386                    ...
1387
1388                Currently for Dolphin Interconnect Solutions' PCI-SCI
1389                bridge.
1390
1391 74 block       Compaq Intelligent Drive Array, third controller
1392                  0 = /dev/ida/c2d0     First logical drive whole disk
1393                 16 = /dev/ida/c2d1     Second logical drive whole disk
1394                    ...
1395                240 = /dev/ida/c2d15    16th logical drive whole disk
1396
1397                Partitions are handled the same way as for Mylex
1398                DAC960 (see major number 48) except that the limit on
1399                partitions is 15.
1400
1401 75 char        Specialix IO8+ serial card
1402                  0 = /dev/ttyW0        First IO8+ port, first card
1403                  1 = /dev/ttyW1        Second IO8+ port, first card
1404                    ...
1405                  8 = /dev/ttyW8        First IO8+ port, second card
1406                    ...
1407
1408 75 block       Compaq Intelligent Drive Array, fourth controller
1409                  0 = /dev/ida/c3d0     First logical drive whole disk
1410                 16 = /dev/ida/c3d1     Second logical drive whole disk
1411                    ...
1412                240 = /dev/ida/c3d15    16th logical drive whole disk
1413
1414                Partitions are handled the same way as for Mylex
1415                DAC960 (see major number 48) except that the limit on
1416                partitions is 15.
1417
1418 76 char        Specialix IO8+ serial card - alternate devices
1419                  0 = /dev/cuw0         Callout device for ttyW0
1420                  1 = /dev/cuw1         Callout device for ttyW1
1421                    ...
1422                  8 = /dev/cuw8         Callout device for ttyW8
1423                    ...
1424
1425 76 block       Compaq Intelligent Drive Array, fifth controller
1426                  0 = /dev/ida/c4d0     First logical drive whole disk
1427                 16 = /dev/ida/c4d1     Second logical drive whole disk
1428                    ...
1429                240 = /dev/ida/c4d15    16th logical drive whole disk
1430
1431                Partitions are handled the same way as for Mylex
1432                DAC960 (see major number 48) except that the limit on
1433                partitions is 15.
1434
1435
1436 77 char        ComScire Quantum Noise Generator
1437                  0 = /dev/qng          ComScire Quantum Noise Generator
1438
1439 77 block       Compaq Intelligent Drive Array, sixth controller
1440                  0 = /dev/ida/c5d0     First logical drive whole disk
1441                 16 = /dev/ida/c5d1     Second logical drive whole disk
1442                    ...
1443                240 = /dev/ida/c5d15    16th logical drive whole disk
1444
1445                Partitions are handled the same way as for Mylex
1446                DAC960 (see major number 48) except that the limit on
1447                partitions is 15.
1448
1449 78 char        PAM Software's multimodem boards
1450                  0 = /dev/ttyM0        First PAM modem
1451                  1 = /dev/ttyM1        Second PAM modem
1452                    ...
1453
1454 78 block       Compaq Intelligent Drive Array, seventh controller
1455                  0 = /dev/ida/c6d0     First logical drive whole disk
1456                 16 = /dev/ida/c6d1     Second logical drive whole disk
1457                    ...
1458                240 = /dev/ida/c6d15    16th logical drive whole disk
1459
1460                Partitions are handled the same way as for Mylex
1461                DAC960 (see major number 48) except that the limit on
1462                partitions is 15.
1463
1464 79 char        PAM Software's multimodem boards - alternate devices
1465                  0 = /dev/cum0         Callout device for ttyM0
1466                  1 = /dev/cum1         Callout device for ttyM1
1467                    ...
1468
1469 79 block       Compaq Intelligent Drive Array, eighth controller
1470                  0 = /dev/ida/c7d0     First logical drive whole disk
1471                 16 = /dev/ida/c7d1     Second logical drive whole disk
1472                    ...
1473                240 = /dev/ida/c715     16th logical drive whole disk
1474
1475                Partitions are handled the same way as for Mylex
1476                DAC960 (see major number 48) except that the limit on
1477                partitions is 15.
1478
1479 80 char        Photometrics AT200 CCD camera
1480                  0 = /dev/at200        Photometrics AT200 CCD camera
1481
1482 80 block       I2O hard disk
1483                  0 = /dev/i2o/hda      First I2O hard disk, whole disk
1484                 16 = /dev/i2o/hdb      Second I2O hard disk, whole disk
1485                    ...
1486                240 = /dev/i2o/hdp      16th I2O hard disk, whole disk
1487
1488                Partitions are handled in the same way as for IDE
1489                disks (see major number 3) except that the limit on
1490                partitions is 15.
1491
1492 81 char        video4linux
1493                  0 = /dev/video0       Video capture/overlay device
1494                    ...
1495                 63 = /dev/video63      Video capture/overlay device
1496                 64 = /dev/radio0       Radio device
1497                    ...
1498                127 = /dev/radio63      Radio device
1499                224 = /dev/vbi0         Vertical blank interrupt
1500                    ...
1501                255 = /dev/vbi31        Vertical blank interrupt
1502
1503 81 block       I2O hard disk
1504                  0 = /dev/i2o/hdq      17th I2O hard disk, whole disk
1505                 16 = /dev/i2o/hdr      18th I2O hard disk, whole disk
1506                    ...
1507                240 = /dev/i2o/hdaf     32nd I2O hard disk, whole disk
1508
1509                Partitions are handled in the same way as for IDE
1510                disks (see major number 3) except that the limit on
1511                partitions is 15.
1512
1513 82 char        WiNRADiO communications receiver card
1514                  0 = /dev/winradio0    First WiNRADiO card
1515                  1 = /dev/winradio1    Second WiNRADiO card
1516                    ...
1517
1518                The driver and documentation may be obtained from
1519                http://www.winradio.com/
1520
1521 82 block       I2O hard disk
1522                  0 = /dev/i2o/hdag     33rd I2O hard disk, whole disk
1523                 16 = /dev/i2o/hdah     34th I2O hard disk, whole disk
1524                    ...
1525                240 = /dev/i2o/hdav     48th I2O hard disk, whole disk
1526
1527                Partitions are handled in the same way as for IDE
1528                disks (see major number 3) except that the limit on
1529                partitions is 15.
1530
1531 83 char        Matrox mga_vid video driver
1532                 0 = /dev/mga_vid0      1st video card
1533                 1 = /dev/mga_vid1      2nd video card
1534                 2 = /dev/mga_vid2      3rd video card
1535                  ...
1536                15 = /dev/mga_vid15     16th video card
1537
1538 83 block       I2O hard disk
1539                  0 = /dev/i2o/hdaw     49th I2O hard disk, whole disk
1540                 16 = /dev/i2o/hdax     50th I2O hard disk, whole disk
1541                    ...
1542                240 = /dev/i2o/hdbl     64th I2O hard disk, whole disk
1543
1544                Partitions are handled in the same way as for IDE
1545                disks (see major number 3) except that the limit on
1546                partitions is 15.
1547
1548 84 char        Ikon 1011[57] Versatec Greensheet Interface
1549                  0 = /dev/ihcp0        First Greensheet port
1550                  1 = /dev/ihcp1        Second Greensheet port
1551
1552 84 block       I2O hard disk
1553                  0 = /dev/i2o/hdbm     65th I2O hard disk, whole disk
1554                 16 = /dev/i2o/hdbn     66th I2O hard disk, whole disk
1555                    ...
1556                240 = /dev/i2o/hdcb     80th I2O hard disk, whole disk
1557
1558                Partitions are handled in the same way as for IDE
1559                disks (see major number 3) except that the limit on
1560                partitions is 15.
1561
1562 85 char        Linux/SGI shared memory input queue
1563                  0 = /dev/shmiq        Master shared input queue
1564                  1 = /dev/qcntl0       First device pushed
1565                  2 = /dev/qcntl1       Second device pushed
1566                    ...
1567
1568 85 block       I2O hard disk
1569                  0 = /dev/i2o/hdcc     81st I2O hard disk, whole disk
1570                 16 = /dev/i2o/hdcd     82nd I2O hard disk, whole disk
1571                    ...
1572                240 = /dev/i2o/hdcr     96th I2O hard disk, whole disk
1573
1574                Partitions are handled in the same way as for IDE
1575                disks (see major number 3) except that the limit on
1576                partitions is 15.
1577
1578 86 char        SCSI media changer
1579                  0 = /dev/sch0         First SCSI media changer
1580                  1 = /dev/sch1         Second SCSI media changer
1581                    ...
1582
1583 86 block       I2O hard disk
1584                  0 = /dev/i2o/hdcs     97th I2O hard disk, whole disk
1585                 16 = /dev/i2o/hdct     98th I2O hard disk, whole disk
1586                    ...
1587                240 = /dev/i2o/hddh     112th I2O hard disk, whole disk
1588
1589                Partitions are handled in the same way as for IDE
1590                disks (see major number 3) except that the limit on
1591                partitions is 15.
1592
1593 87 char        Sony Control-A1 stereo control bus
1594                  0 = /dev/controla0    First device on chain
1595                  1 = /dev/controla1    Second device on chain
1596                    ...
1597
1598 87 block       I2O hard disk
1599                  0 = /dev/i2o/hddi     113rd I2O hard disk, whole disk
1600                 16 = /dev/i2o/hddj     114th I2O hard disk, whole disk
1601                    ...
1602                240 = /dev/i2o/hddx     128th I2O hard disk, whole disk
1603
1604                Partitions are handled in the same way as for IDE
1605                disks (see major number 3) except that the limit on
1606                partitions is 15.
1607
1608 88 char        COMX synchronous serial card
1609                  0 = /dev/comx0        COMX channel 0
1610                  1 = /dev/comx1        COMX channel 1
1611                    ...
1612
1613 88 block       Seventh IDE hard disk/CD-ROM interface
1614                  0 = /dev/hdm          Master: whole disk (or CD-ROM)
1615                 64 = /dev/hdn          Slave: whole disk (or CD-ROM)
1616
1617                Partitions are handled the same way as for the first
1618                interface (see major number 3).
1619
1620 89 char        I2C bus interface
1621                  0 = /dev/i2c-0        First I2C adapter
1622                  1 = /dev/i2c-1        Second I2C adapter
1623                    ...
1624
1625 89 block       Eighth IDE hard disk/CD-ROM interface
1626                  0 = /dev/hdo          Master: whole disk (or CD-ROM)
1627                 64 = /dev/hdp          Slave: whole disk (or CD-ROM)
1628
1629                Partitions are handled the same way as for the first
1630                interface (see major number 3).
1631
1632 90 char        Memory Technology Device (RAM, ROM, Flash)
1633                  0 = /dev/mtd0         First MTD (rw)
1634                  1 = /dev/mtdr0        First MTD (ro)
1635                    ...
1636                 30 = /dev/mtd15        16th MTD (rw)
1637                 31 = /dev/mtdr15       16th MTD (ro)
1638
1639 90 block       Ninth IDE hard disk/CD-ROM interface
1640                  0 = /dev/hdq          Master: whole disk (or CD-ROM)
1641                 64 = /dev/hdr          Slave: whole disk (or CD-ROM)
1642
1643                Partitions are handled the same way as for the first
1644                interface (see major number 3).
1645
1646 91 char        CAN-Bus devices
1647                  0 = /dev/can0         First CAN-Bus controller
1648                  1 = /dev/can1         Second CAN-Bus controller
1649                    ...
1650
1651 91 block       Tenth IDE hard disk/CD-ROM interface
1652                  0 = /dev/hds          Master: whole disk (or CD-ROM)
1653                 64 = /dev/hdt          Slave: whole disk (or CD-ROM)
1654
1655                Partitions are handled the same way as for the first
1656                interface (see major number 3).
1657
1658 92 char        Reserved for ith Kommunikationstechnik MIC ISDN card
1659
1660 92 block       PPDD encrypted disk driver
1661                  0 = /dev/ppdd0        First encrypted disk
1662                  1 = /dev/ppdd1        Second encrypted disk
1663                    ...
1664
1665                Partitions are handled in the same way as for IDE
1666                disks (see major number 3) except that the limit on
1667                partitions is 15.
1668
1669 93 char
1670
1671 93 block       NAND Flash Translation Layer filesystem
1672                  0 = /dev/nftla        First NFTL layer
1673                 16 = /dev/nftlb        Second NFTL layer
1674                    ...
1675                240 = /dev/nftlp        16th NTFL layer
1676
1677 94 char
1678
1679 94 block       IBM S/390 DASD block storage
1680                  0 = /dev/dasda First DASD device, major
1681                  1 = /dev/dasda1 First DASD device, block 1
1682                  2 = /dev/dasda2 First DASD device, block 2
1683                  3 = /dev/dasda3 First DASD device, block 3
1684                  4 = /dev/dasdb Second DASD device, major
1685                  5 = /dev/dasdb1 Second DASD device, block 1
1686                  6 = /dev/dasdb2 Second DASD device, block 2
1687                  7 = /dev/dasdb3 Second DASD device, block 3
1688                    ...
1689
1690 95 char        IP filter
1691                  0 = /dev/ipl          Filter control device/log file
1692                  1 = /dev/ipnat        NAT control device/log file
1693                  2 = /dev/ipstate      State information log file
1694                  3 = /dev/ipauth       Authentication control device/log file
1695                    ...
1696
1697 96 char        Parallel port ATAPI tape devices
1698                  0 = /dev/pt0          First parallel port ATAPI tape
1699                  1 = /dev/pt1          Second parallel port ATAPI tape
1700                    ...
1701                128 = /dev/npt0         First p.p. ATAPI tape, no rewind
1702                129 = /dev/npt1         Second p.p. ATAPI tape, no rewind
1703                    ...
1704
1705 96 block       Inverse NAND Flash Translation Layer
1706                  0 = /dev/inftla First INFTL layer
1707                 16 = /dev/inftlb Second INFTL layer
1708                    ...
1709                240 = /dev/inftlp       16th INTFL layer
1710
1711 97 char        Parallel port generic ATAPI interface
1712                  0 = /dev/pg0          First parallel port ATAPI device
1713                  1 = /dev/pg1          Second parallel port ATAPI device
1714                  2 = /dev/pg2          Third parallel port ATAPI device
1715                  3 = /dev/pg3          Fourth parallel port ATAPI device
1716
1717                These devices support the same API as the generic SCSI
1718                devices.
1719
1720 98 char        Control and Measurement Device (comedi)
1721                  0 = /dev/comedi0      First comedi device
1722                  1 = /dev/comedi1      Second comedi device
1723                    ...
1724
1725                See http://stm.lbl.gov/comedi.
1726
1727 98 block       User-mode virtual block device
1728                  0 = /dev/ubda         First user-mode block device
1729                 16 = /dev/udbb         Second user-mode block device
1730                    ...
1731
1732                Partitions are handled in the same way as for IDE
1733                disks (see major number 3) except that the limit on
1734                partitions is 15.
1735
1736                This device is used by the user-mode virtual kernel port.
1737
1738 99 char        Raw parallel ports
1739                  0 = /dev/parport0     First parallel port
1740                  1 = /dev/parport1     Second parallel port
1741                    ...
1742
1743 99 block       JavaStation flash disk
1744                  0 = /dev/jsfd         JavaStation flash disk
1745
1746100 char        Telephony for Linux
1747                  0 = /dev/phone0       First telephony device
1748                  1 = /dev/phone1       Second telephony device
1749                    ...
1750
1751101 char        Motorola DSP 56xxx board
1752                  0 = /dev/mdspstat     Status information
1753                  1 = /dev/mdsp1        First DSP board I/O controls
1754                    ...
1755                 16 = /dev/mdsp16       16th DSP board I/O controls
1756
1757101 block       AMI HyperDisk RAID controller
1758                  0 = /dev/amiraid/ar0  First array whole disk
1759                 16 = /dev/amiraid/ar1  Second array whole disk
1760                    ...
1761                240 = /dev/amiraid/ar15 16th array whole disk
1762
1763                For each device, partitions are added as:
1764                  0 = /dev/amiraid/ar?    Whole disk
1765                  1 = /dev/amiraid/ar?p1  First partition
1766                  2 = /dev/amiraid/ar?p2  Second partition
1767                    ...
1768                 15 = /dev/amiraid/ar?p15 15th partition
1769
1770102 char
1771
1772102 block       Compressed block device
1773                  0 = /dev/cbd/a        First compressed block device, whole device
1774                 16 = /dev/cbd/b        Second compressed block device, whole device
1775                    ...
1776                240 = /dev/cbd/p        16th compressed block device, whole device
1777
1778                Partitions are handled in the same way as for IDE
1779                disks (see major number 3) except that the limit on
1780                partitions is 15.
1781
1782103 char        Arla network file system
1783                  0 = /dev/nnpfs0       First NNPFS device
1784                  1 = /dev/nnpfs1       Second NNPFS device
1785
1786                Arla is a free clone of the Andrew File System, AFS.
1787                The NNPFS device gives user mode filesystem
1788                implementations a kernel presence for caching and easy
1789                mounting.  For more information about the project,
1790                write to <arla-drinkers@stacken.kth.se> or see
1791                http://www.stacken.kth.se/project/arla/
1792
1793103 block       Audit device
1794                  0 = /dev/audit        Audit device
1795
1796104 char        Flash BIOS support
1797
1798104 block       Compaq Next Generation Drive Array, first controller
1799                  0 = /dev/cciss/c0d0   First logical drive, whole disk
1800                 16 = /dev/cciss/c0d1   Second logical drive, whole disk
1801                    ...
1802                240 = /dev/cciss/c0d15  16th logical drive, whole disk
1803
1804                Partitions are handled the same way as for Mylex
1805                DAC960 (see major number 48) except that the limit on
1806                partitions is 15.
1807
1808105 char        Comtrol VS-1000 serial controller
1809                  0 = /dev/ttyV0        First VS-1000 port
1810                  1 = /dev/ttyV1        Second VS-1000 port
1811                    ...
1812
1813105 block       Compaq Next Generation Drive Array, second controller
1814                  0 = /dev/cciss/c1d0   First logical drive, whole disk
1815                 16 = /dev/cciss/c1d1   Second logical drive, whole disk
1816                    ...
1817                240 = /dev/cciss/c1d15  16th logical drive, whole disk
1818
1819                Partitions are handled the same way as for Mylex
1820                DAC960 (see major number 48) except that the limit on
1821                partitions is 15.
1822
1823106 char        Comtrol VS-1000 serial controller - alternate devices
1824                  0 = /dev/cuv0         First VS-1000 port
1825                  1 = /dev/cuv1         Second VS-1000 port
1826                    ...
1827
1828106 block       Compaq Next Generation Drive Array, third controller
1829                  0 = /dev/cciss/c2d0   First logical drive, whole disk
1830                 16 = /dev/cciss/c2d1   Second logical drive, whole disk
1831                    ...
1832                240 = /dev/cciss/c2d15  16th logical drive, whole disk
1833
1834                Partitions are handled the same way as for Mylex
1835                DAC960 (see major number 48) except that the limit on
1836                partitions is 15.
1837
1838107 char        3Dfx Voodoo Graphics device
1839                  0 = /dev/3dfx         Primary 3Dfx graphics device
1840
1841107 block       Compaq Next Generation Drive Array, fourth controller
1842                  0 = /dev/cciss/c3d0   First logical drive, whole disk
1843                 16 = /dev/cciss/c3d1   Second logical drive, whole disk
1844                    ...
1845                240 = /dev/cciss/c3d15  16th logical drive, whole disk
1846
1847                Partitions are handled the same way as for Mylex
1848                DAC960 (see major number 48) except that the limit on
1849                partitions is 15.
1850
1851108 char        Device independent PPP interface
1852                  0 = /dev/ppp          Device independent PPP interface
1853
1854108 block       Compaq Next Generation Drive Array, fifth controller
1855                  0 = /dev/cciss/c4d0   First logical drive, whole disk
1856                 16 = /dev/cciss/c4d1   Second logical drive, whole disk
1857                    ...
1858                240 = /dev/cciss/c4d15  16th logical drive, whole disk
1859
1860                Partitions are handled the same way as for Mylex
1861                DAC960 (see major number 48) except that the limit on
1862                partitions is 15.
1863
1864109 char        Reserved for logical volume manager
1865
1866109 block       Compaq Next Generation Drive Array, sixth controller
1867                  0 = /dev/cciss/c5d0   First logical drive, whole disk
1868                 16 = /dev/cciss/c5d1   Second logical drive, whole disk
1869                    ...
1870                240 = /dev/cciss/c5d15  16th logical drive, whole disk
1871
1872                Partitions are handled the same way as for Mylex
1873                DAC960 (see major number 48) except that the limit on
1874                partitions is 15.
1875
1876110 char        miroMEDIA Surround board
1877                  0 = /dev/srnd0        First miroMEDIA Surround board
1878                  1 = /dev/srnd1        Second miroMEDIA Surround board
1879                    ...
1880
1881110 block       Compaq Next Generation Drive Array, seventh controller
1882                  0 = /dev/cciss/c6d0   First logical drive, whole disk
1883                 16 = /dev/cciss/c6d1   Second logical drive, whole disk
1884                    ...
1885                240 = /dev/cciss/c6d15  16th logical drive, whole disk
1886
1887                Partitions are handled the same way as for Mylex
1888                DAC960 (see major number 48) except that the limit on
1889                partitions is 15.
1890
1891111 char
1892
1893111 block       Compaq Next Generation Drive Array, eighth controller
1894                  0 = /dev/cciss/c7d0   First logical drive, whole disk
1895                 16 = /dev/cciss/c7d1   Second logical drive, whole disk
1896                    ...
1897                240 = /dev/cciss/c7d15  16th logical drive, whole disk
1898
1899                Partitions are handled the same way as for Mylex
1900                DAC960 (see major number 48) except that the limit on
1901                partitions is 15.
1902
1903112 char        ISI serial card
1904                  0 = /dev/ttyM0        First ISI port
1905                  1 = /dev/ttyM1        Second ISI port
1906                    ...
1907
1908                There is currently a device-naming conflict between
1909                these and PAM multimodems (major 78).
1910
1911112 block       IBM iSeries virtual disk
1912                  0 = /dev/iseries/vda  First virtual disk, whole disk
1913                  8 = /dev/iseries/vdb  Second virtual disk, whole disk
1914                    ...
1915                200 = /dev/iseries/vdz  26th virtual disk, whole disk
1916                208 = /dev/iseries/vdaa 27th virtual disk, whole disk
1917                    ...
1918                248 = /dev/iseries/vdaf 32nd virtual disk, whole disk
1919
1920                Partitions are handled in the same way as for IDE
1921                disks (see major number 3) except that the limit on
1922                partitions is 7.
1923
1924113 char        ISI serial card - alternate devices
1925                  0 = /dev/cum0         Callout device for ttyM0
1926                  1 = /dev/cum1         Callout device for ttyM1
1927                    ...
1928
1929113 block       IBM iSeries virtual CD-ROM
1930                  0 = /dev/iseries/vcda First virtual CD-ROM
1931                  1 = /dev/iseries/vcdb Second virtual CD-ROM
1932                    ...
1933
1934114 char        Picture Elements ISE board
1935                  0 = /dev/ise0         First ISE board
1936                  1 = /dev/ise1         Second ISE board
1937                    ...
1938                128 = /dev/isex0        Control node for first ISE board
1939                129 = /dev/isex1        Control node for second ISE board
1940                    ...
1941
1942                The ISE board is an embedded computer, optimized for
1943                image processing. The /dev/iseN nodes are the general
1944                I/O access to the board, the /dev/isex0 nodes command
1945                nodes used to control the board.
1946
1947114 block       IDE BIOS powered software RAID interfaces such as the
1948                Promise Fastrak
1949
1950                  0 = /dev/ataraid/d0
1951                  1 = /dev/ataraid/d0p1
1952                  2 = /dev/ataraid/d0p2
1953                  ...
1954                 16 = /dev/ataraid/d1
1955                 17 = /dev/ataraid/d1p1
1956                 18 = /dev/ataraid/d1p2
1957                  ...
1958                255 = /dev/ataraid/d15p15
1959
1960                Partitions are handled in the same way as for IDE
1961                disks (see major number 3) except that the limit on
1962                partitions is 15.
1963
1964115 char        TI link cable devices (115 was formerly the console driver speaker)
1965                  0 = /dev/tipar0    Parallel cable on first parallel port
1966                  ...
1967                  7 = /dev/tipar7    Parallel cable on seventh parallel port
1968
1969                  8 = /dev/tiser0    Serial cable on first serial port
1970                  ...
1971                 15 = /dev/tiser7    Serial cable on seventh serial port
1972
1973                 16 = /dev/tiusb0    First USB cable
1974                  ...
1975                 47 = /dev/tiusb31   32nd USB cable
1976
1977115 block       NetWare (NWFS) Devices (0-255)
1978
1979                The NWFS (NetWare) devices are used to present a
1980                collection of NetWare Mirror Groups or NetWare
1981                Partitions as a logical storage segment for
1982                use in mounting NetWare volumes.  A maximum of
1983                256 NetWare volumes can be supported in a single
1984                machine.
1985
1986                http://cgfa.telepac.pt/ftp2/kernel.org/linux/kernel/people/jmerkey/nwfs/
1987
1988                0 = /dev/nwfs/v0    First NetWare (NWFS) Logical Volume
1989                1 = /dev/nwfs/v1    Second NetWare (NWFS) Logical Volume
1990                2 = /dev/nwfs/v2    Third NetWare (NWFS) Logical Volume
1991                      ...
1992                255 = /dev/nwfs/v255    Last NetWare (NWFS) Logical Volume
1993
1994116 char        Advanced Linux Sound Driver (ALSA)
1995
1996116 block       MicroMemory battery backed RAM adapter (NVRAM)
1997                Supports 16 boards, 15 partitions each.
1998                Requested by neilb at cse.unsw.edu.au.
1999
2000                 0 = /dev/umem/d0      Whole of first board
2001                 1 = /dev/umem/d0p1    First partition of first board
2002                 2 = /dev/umem/d0p2    Second partition of first board
2003                15 = /dev/umem/d0p15   15th partition of first board
2004
2005                16 = /dev/umem/d1      Whole of second board
2006                17 = /dev/umem/d1p1    First partition of second board
2007                    ...
2008                255= /dev/umem/d15p15  15th partition of 16th board.
2009
2010117 char        COSA/SRP synchronous serial card
2011                  0 = /dev/cosa0c0      1st board, 1st channel
2012                  1 = /dev/cosa0c1      1st board, 2nd channel
2013                    ...
2014                 16 = /dev/cosa1c0      2nd board, 1st channel
2015                 17 = /dev/cosa1c1      2nd board, 2nd channel
2016                    ...
2017
2018117 block       Enterprise Volume Management System (EVMS)
2019
2020                The EVMS driver uses a layered, plug-in model to provide
2021                unparalleled flexibility and extensibility in managing
2022                storage.  This allows for easy expansion or customization
2023                of various levels of volume management.  Requested by
2024                Mark Peloquin (peloquin at us.ibm.com).
2025
2026                Note: EVMS populates and manages all the devnodes in
2027                /dev/evms.
2028
2029                http://sf.net/projects/evms
2030
2031                  0 = /dev/evms/block_device   EVMS block device
2032                  1 = /dev/evms/legacyname1    First EVMS legacy device
2033                  2 = /dev/evms/legacyname2    Second EVMS legacy device
2034                    ...
2035                    Both ranges can grow (down or up) until they meet.
2036                    ...
2037                254 = /dev/evms/EVMSname2      Second EVMS native device
2038                255 = /dev/evms/EVMSname1      First EVMS native device
2039
2040                Note: legacyname(s) are derived from the normal legacy
2041                device names.  For example, /dev/hda5 would become
2042                /dev/evms/hda5.
2043
2044118 char        IBM Cryptographic Accelerator
2045                  0 = /dev/ica  Virtual interface to all IBM Crypto Accelerators
2046                  1 = /dev/ica0 IBMCA Device 0
2047                  2 = /dev/ica1 IBMCA Device 1
2048                    ...
2049
2050119 char        VMware virtual network control
2051                  0 = /dev/vnet0        1st virtual network
2052                  1 = /dev/vnet1        2nd virtual network
2053                    ...
2054
2055120-127 char    LOCAL/EXPERIMENTAL USE
2056
2057120-127 block   LOCAL/EXPERIMENTAL USE
2058                Allocated for local/experimental use.  For devices not
2059                assigned official numbers, these ranges should be
2060                used in order to avoid conflicting with future assignments.
2061
2062128-135 char    Unix98 PTY masters
2063
2064                These devices should not have corresponding device
2065                nodes; instead they should be accessed through the
2066                /dev/ptmx cloning interface.
2067
2068128 block       SCSI disk devices (128-143)
2069                  0 = /dev/sddy         129th SCSI disk whole disk
2070                 16 = /dev/sddz         130th SCSI disk whole disk
2071                 32 = /dev/sdea         131th SCSI disk whole disk
2072                    ...
2073                240 = /dev/sden         144th SCSI disk whole disk
2074
2075                Partitions are handled in the same way as for IDE
2076                disks (see major number 3) except that the limit on
2077                partitions is 15.
2078
2079129 block       SCSI disk devices (144-159)
2080                  0 = /dev/sdeo         145th SCSI disk whole disk
2081                 16 = /dev/sdep         146th SCSI disk whole disk
2082                 32 = /dev/sdeq         147th SCSI disk whole disk
2083                    ...
2084                240 = /dev/sdfd         160th SCSI disk whole disk
2085
2086                Partitions are handled in the same way as for IDE
2087                disks (see major number 3) except that the limit on
2088                partitions is 15.
2089
2090130 char        (Misc devices)
2091
2092130 block       SCSI disk devices (160-175)
2093                  0 = /dev/sdfe         161st SCSI disk whole disk
2094                 16 = /dev/sdff         162nd SCSI disk whole disk
2095                 32 = /dev/sdfg         163rd SCSI disk whole disk
2096                    ...
2097                240 = /dev/sdft         176th SCSI disk whole disk
2098
2099                Partitions are handled in the same way as for IDE
2100                disks (see major number 3) except that the limit on
2101                partitions is 15.
2102
2103131 block       SCSI disk devices (176-191)
2104                  0 = /dev/sdfu         177th SCSI disk whole disk
2105                 16 = /dev/sdfv         178th SCSI disk whole disk
2106                 32 = /dev/sdfw         179th SCSI disk whole disk
2107                    ...
2108                240 = /dev/sdgj         192nd SCSI disk whole disk
2109
2110                Partitions are handled in the same way as for IDE
2111                disks (see major number 3) except that the limit on
2112                partitions is 15.
2113
2114132 block       SCSI disk devices (192-207)
2115                  0 = /dev/sdgk         193rd SCSI disk whole disk
2116                 16 = /dev/sdgl         194th SCSI disk whole disk
2117                 32 = /dev/sdgm         195th SCSI disk whole disk
2118                    ...
2119                240 = /dev/sdgz         208th SCSI disk whole disk
2120
2121                Partitions are handled in the same way as for IDE
2122                disks (see major number 3) except that the limit on
2123                partitions is 15.
2124
2125133 block       SCSI disk devices (208-223)
2126                  0 = /dev/sdha         209th SCSI disk whole disk
2127                 16 = /dev/sdhb         210th SCSI disk whole disk
2128                 32 = /dev/sdhc         211th SCSI disk whole disk
2129                    ...
2130                240 = /dev/sdhp         224th SCSI disk whole disk
2131
2132                Partitions are handled in the same way as for IDE
2133                disks (see major number 3) except that the limit on
2134                partitions is 15.
2135
2136134 block       SCSI disk devices (224-239)
2137                  0 = /dev/sdhq         225th SCSI disk whole disk
2138                 16 = /dev/sdhr         226th SCSI disk whole disk
2139                 32 = /dev/sdhs         227th SCSI disk whole disk
2140                    ...
2141                240 = /dev/sdif         240th SCSI disk whole disk
2142
2143                Partitions are handled in the same way as for IDE
2144                disks (see major number 3) except that the limit on
2145                partitions is 15.
2146
2147135 block       SCSI disk devices (240-255)
2148                  0 = /dev/sdig         241st SCSI disk whole disk
2149                 16 = /dev/sdih         242nd SCSI disk whole disk
2150                 32 = /dev/sdih         243rd SCSI disk whole disk
2151                    ...
2152                240 = /dev/sdiv         256th SCSI disk whole disk
2153
2154                Partitions are handled in the same way as for IDE
2155                disks (see major number 3) except that the limit on
2156                partitions is 15.
2157
2158136-143 char    Unix98 PTY slaves
2159                  0 = /dev/pts/0        First Unix98 pseudo-TTY
2160                  1 = /dev/pts/1        Second Unix98 pseudo-TTY
2161                    ...
2162
2163                These device nodes are automatically generated with
2164                the proper permissions and modes by mounting the
2165                devpts filesystem onto /dev/pts with the appropriate
2166                mount options (distribution dependent, however, on
2167                *most* distributions the appropriate options are
2168                "mode=0620,gid=<gid of the "tty" group>".)
2169
2170136 block       Mylex DAC960 PCI RAID controller; ninth controller
2171                  0 = /dev/rd/c8d0      First disk, whole disk
2172                  8 = /dev/rd/c8d1      Second disk, whole disk
2173                    ...
2174                248 = /dev/rd/c8d31     32nd disk, whole disk
2175
2176                Partitions are handled as for major 48.
2177
2178137 block       Mylex DAC960 PCI RAID controller; tenth controller
2179                  0 = /dev/rd/c9d0      First disk, whole disk
2180                  8 = /dev/rd/c9d1      Second disk, whole disk
2181                    ...
2182                248 = /dev/rd/c9d31     32nd disk, whole disk
2183
2184                Partitions are handled as for major 48.
2185
2186138 block       Mylex DAC960 PCI RAID controller; eleventh controller
2187                  0 = /dev/rd/c10d0     First disk, whole disk
2188                  8 = /dev/rd/c10d1     Second disk, whole disk
2189                    ...
2190                248 = /dev/rd/c10d31    32nd disk, whole disk
2191
2192                Partitions are handled as for major 48.
2193
2194139 block       Mylex DAC960 PCI RAID controller; twelfth controller
2195                  0 = /dev/rd/c11d0     First disk, whole disk
2196                  8 = /dev/rd/c11d1     Second disk, whole disk
2197                    ...
2198                248 = /dev/rd/c11d31    32nd disk, whole disk
2199
2200                Partitions are handled as for major 48.
2201
2202140 block       Mylex DAC960 PCI RAID controller; thirteenth controller
2203                  0 = /dev/rd/c12d0     First disk, whole disk
2204                  8 = /dev/rd/c12d1     Second disk, whole disk
2205                    ...
2206                248 = /dev/rd/c12d31    32nd disk, whole disk
2207
2208                Partitions are handled as for major 48.
2209
2210141 block       Mylex DAC960 PCI RAID controller; fourteenth controller
2211                  0 = /dev/rd/c13d0     First disk, whole disk
2212                  8 = /dev/rd/c13d1     Second disk, whole disk
2213                    ...
2214                248 = /dev/rd/c13d31    32nd disk, whole disk
2215
2216                Partitions are handled as for major 48.
2217
2218142 block       Mylex DAC960 PCI RAID controller; fifteenth controller
2219                  0 = /dev/rd/c14d0     First disk, whole disk
2220                  8 = /dev/rd/c14d1     Second disk, whole disk
2221                    ...
2222                248 = /dev/rd/c14d31    32nd disk, whole disk
2223
2224                Partitions are handled as for major 48.
2225
2226143 block       Mylex DAC960 PCI RAID controller; sixteenth controller
2227                  0 = /dev/rd/c15d0     First disk, whole disk
2228                  8 = /dev/rd/c15d1     Second disk, whole disk
2229                    ...
2230                248 = /dev/rd/c15d31    32nd disk, whole disk
2231
2232                Partitions are handled as for major 48.
2233
2234144 char        Encapsulated PPP
2235                  0 = /dev/pppox0       First PPP over Ethernet
2236                    ...
2237                 63 = /dev/pppox63      64th PPP over Ethernet
2238
2239                This is primarily used for ADSL.
2240
2241                The SST 5136-DN DeviceNet interface driver has been
2242                relocated to major 183 due to an unfortunate conflict.
2243
2244144 block       Expansion Area #1 for more non-device (e.g. NFS) mounts
2245                  0 = mounted device 256
2246                255 = mounted device 511
2247
2248145 char        SAM9407-based soundcard
2249                  0 = /dev/sam0_mixer
2250                  1 = /dev/sam0_sequencer
2251                  2 = /dev/sam0_midi00
2252                  3 = /dev/sam0_dsp
2253                  4 = /dev/sam0_audio
2254                  6 = /dev/sam0_sndstat
2255                 18 = /dev/sam0_midi01
2256                 34 = /dev/sam0_midi02
2257                 50 = /dev/sam0_midi03
2258                 64 = /dev/sam1_mixer
2259                    ...
2260                128 = /dev/sam2_mixer
2261                    ...
2262                192 = /dev/sam3_mixer
2263                    ...
2264
2265                Device functions match OSS, but offer a number of
2266                addons, which are sam9407 specific.  OSS can be
2267                operated simultaneously, taking care of the codec.
2268
2269145 block       Expansion Area #2 for more non-device (e.g. NFS) mounts
2270                  0 = mounted device 512
2271                255 = mounted device 767
2272
2273146 char        SYSTRAM SCRAMNet mirrored-memory network
2274                  0 = /dev/scramnet0    First SCRAMNet device
2275                  1 = /dev/scramnet1    Second SCRAMNet device
2276                    ...
2277
2278146 block       Expansion Area #3 for more non-device (e.g. NFS) mounts
2279                  0 = mounted device 768
2280                255 = mounted device 1023
2281
2282147 char        Aureal Semiconductor Vortex Audio device
2283                  0 = /dev/aureal0      First Aureal Vortex
2284                  1 = /dev/aureal1      Second Aureal Vortex
2285                    ...
2286
2287147 block       Distributed Replicated Block Device (DRBD)
2288                  0 = /dev/drbd0        First DRBD device
2289                  1 = /dev/drbd1        Second DRBD device
2290                    ...
2291
2292148 char        Technology Concepts serial card
2293                  0 = /dev/ttyT0        First TCL port
2294                  1 = /dev/ttyT1        Second TCL port
2295                    ...
2296
2297149 char        Technology Concepts serial card - alternate devices
2298                  0 = /dev/cut0         Callout device for ttyT0
2299                  1 = /dev/cut0         Callout device for ttyT1
2300                    ...
2301
2302150 char        Real-Time Linux FIFOs
2303                  0 = /dev/rtf0         First RTLinux FIFO
2304                  1 = /dev/rtf1         Second RTLinux FIFO
2305                    ...
2306
2307151 char        DPT I2O SmartRaid V controller
2308                  0 = /dev/dpti0        First DPT I2O adapter
2309                  1 = /dev/dpti1        Second DPT I2O adapter
2310                    ...
2311
2312152 char        EtherDrive Control Device
2313                  0 = /dev/etherd/ctl   Connect/Disconnect an EtherDrive
2314                  1 = /dev/etherd/err   Monitor errors
2315                  2 = /dev/etherd/raw   Raw AoE packet monitor
2316
2317152 block       EtherDrive Block Devices
2318                  0 = /dev/etherd/0     EtherDrive 0
2319                    ...
2320                255 = /dev/etherd/255   EtherDrive 255
2321
2322153 char        SPI Bus Interface (sometimes referred to as MicroWire)
2323                  0 = /dev/spi0         First SPI device on the bus
2324                  1 = /dev/spi1         Second SPI device on the bus
2325                    ...
2326                 15 = /dev/spi15        Sixteenth SPI device on the bus
2327
2328153 block       Enhanced Metadisk RAID (EMD) storage units
2329                  0 = /dev/emd/0        First unit
2330                  1 = /dev/emd/0p1      Partition 1 on First unit
2331                  2 = /dev/emd/0p2      Partition 2 on First unit
2332                    ...
2333                 15 = /dev/emd/0p15     Partition 15 on First unit
2334
2335                 16 = /dev/emd/1        Second unit
2336                 32 = /dev/emd/2        Third unit
2337                    ...
2338                240 = /dev/emd/15       Sixteenth unit
2339
2340                Partitions are handled in the same way as for IDE
2341                disks (see major number 3) except that the limit on
2342                partitions is 15.
2343
2344154 char        Specialix RIO serial card
2345                  0 = /dev/ttySR0       First RIO port
2346                    ...
2347                255 = /dev/ttySR255     256th RIO port
2348
2349155 char        Specialix RIO serial card - alternate devices
2350                  0 = /dev/cusr0        Callout device for ttySR0
2351                    ...
2352                255 = /dev/cusr255      Callout device for ttySR255
2353
2354156 char        Specialix RIO serial card
2355                  0 = /dev/ttySR256     257th RIO port
2356                    ...
2357                255 = /dev/ttySR511     512th RIO port
2358
2359157 char        Specialix RIO serial card - alternate devices
2360                  0 = /dev/cusr256      Callout device for ttySR256
2361                    ...
2362                255 = /dev/cusr511      Callout device for ttySR511
2363
2364158 char        Dialogic GammaLink fax driver
2365                  0 = /dev/gfax0        GammaLink channel 0
2366                  1 = /dev/gfax1        GammaLink channel 1
2367                    ...
2368
2369159 char        RESERVED
2370
2371159 block       RESERVED
2372
2373160 char        General Purpose Instrument Bus (GPIB)
2374                  0 = /dev/gpib0        First GPIB bus
2375                  1 = /dev/gpib1        Second GPIB bus
2376                    ...
2377
2378160 block       Carmel 8-port SATA Disks on First Controller
2379                  0 = /dev/carmel/0     SATA disk 0 whole disk
2380                  1 = /dev/carmel/0p1   SATA disk 0 partition 1
2381                    ...
2382                 31 = /dev/carmel/0p31  SATA disk 0 partition 31
2383
2384                 32 = /dev/carmel/1     SATA disk 1 whole disk
2385                 64 = /dev/carmel/2     SATA disk 2 whole disk
2386                    ...
2387                224 = /dev/carmel/7     SATA disk 7 whole disk
2388
2389                Partitions are handled in the same way as for IDE
2390                disks (see major number 3) except that the limit on
2391                partitions is 31.
2392
2393161 char        IrCOMM devices (IrDA serial/parallel emulation)
2394                  0 = /dev/ircomm0      First IrCOMM device
2395                  1 = /dev/ircomm1      Second IrCOMM device
2396                    ...
2397                 16 = /dev/irlpt0       First IrLPT device
2398                 17 = /dev/irlpt1       Second IrLPT device
2399                    ...
2400
2401161 block       Carmel 8-port SATA Disks on Second Controller
2402                  0 = /dev/carmel/8     SATA disk 8 whole disk
2403                  1 = /dev/carmel/8p1   SATA disk 8 partition 1
2404                    ...
2405                 31 = /dev/carmel/8p31  SATA disk 8 partition 31
2406
2407                 32 = /dev/carmel/9     SATA disk 9 whole disk
2408                 64 = /dev/carmel/10    SATA disk 10 whole disk
2409                    ...
2410                224 = /dev/carmel/15    SATA disk 15 whole disk
2411
2412                Partitions are handled in the same way as for IDE
2413                disks (see major number 3) except that the limit on
2414                partitions is 31.
2415
2416162 char        Raw block device interface
2417                  0 = /dev/rawctl       Raw I/O control device
2418                  1 = /dev/raw/raw1     First raw I/O device
2419                  2 = /dev/raw/raw2     Second raw I/O device
2420                    ...
2421
2422163 char
2423
2424164 char        Chase Research AT/PCI-Fast serial card
2425                  0 = /dev/ttyCH0       AT/PCI-Fast board 0, port 0
2426                    ...
2427                 15 = /dev/ttyCH15      AT/PCI-Fast board 0, port 15
2428                 16 = /dev/ttyCH16      AT/PCI-Fast board 1, port 0
2429                    ...
2430                 31 = /dev/ttyCH31      AT/PCI-Fast board 1, port 15
2431                 32 = /dev/ttyCH32      AT/PCI-Fast board 2, port 0
2432                    ...
2433                 47 = /dev/ttyCH47      AT/PCI-Fast board 2, port 15
2434                 48 = /dev/ttyCH48      AT/PCI-Fast board 3, port 0
2435                    ...
2436                 63 = /dev/ttyCH63      AT/PCI-Fast board 3, port 15
2437
2438165 char        Chase Research AT/PCI-Fast serial card - alternate devices
2439                  0 = /dev/cuch0        Callout device for ttyCH0
2440                    ...
2441                 63 = /dev/cuch63       Callout device for ttyCH63
2442
2443166 char        ACM USB modems
2444                  0 = /dev/ttyACM0      First ACM modem
2445                  1 = /dev/ttyACM1      Second ACM modem
2446                    ...
2447
2448167 char        ACM USB modems - alternate devices
2449                  0 = /dev/cuacm0       Callout device for ttyACM0
2450                  1 = /dev/cuacm1       Callout device for ttyACM1
2451                    ...
2452
2453168 char        Eracom CSA7000 PCI encryption adaptor
2454                  0 = /dev/ecsa0        First CSA7000
2455                  1 = /dev/ecsa1        Second CSA7000
2456                    ...
2457
2458169 char        Eracom CSA8000 PCI encryption adaptor
2459                  0 = /dev/ecsa8-0      First CSA8000
2460                  1 = /dev/ecsa8-1      Second CSA8000
2461                    ...
2462
2463170 char        AMI MegaRAC remote access controller
2464                  0 = /dev/megarac0     First MegaRAC card
2465                  1 = /dev/megarac1     Second MegaRAC card
2466                    ...
2467
2468171 char        Reserved for IEEE 1394 (Firewire)
2469
2470172 char        Moxa Intellio serial card
2471                  0 = /dev/ttyMX0       First Moxa port
2472                  1 = /dev/ttyMX1       Second Moxa port
2473                    ...
2474                127 = /dev/ttyMX127     128th Moxa port
2475                128 = /dev/moxactl      Moxa control port
2476
2477173 char        Moxa Intellio serial card - alternate devices
2478                  0 = /dev/cumx0        Callout device for ttyMX0
2479                  1 = /dev/cumx1        Callout device for ttyMX1
2480                    ...
2481                127 = /dev/cumx127      Callout device for ttyMX127
2482
2483174 char        SmartIO serial card
2484                  0 = /dev/ttySI0       First SmartIO port
2485                  1 = /dev/ttySI1       Second SmartIO port
2486                    ...
2487
2488175 char        SmartIO serial card - alternate devices
2489                  0 = /dev/cusi0        Callout device for ttySI0
2490                  1 = /dev/cusi1        Callout device for ttySI1
2491                    ...
2492
2493176 char        nCipher nFast PCI crypto accelerator
2494                  0 = /dev/nfastpci0    First nFast PCI device
2495                  1 = /dev/nfastpci1    First nFast PCI device
2496                    ...
2497
2498177 char        TI PCILynx memory spaces
2499                  0 = /dev/pcilynx/aux0  AUX space of first PCILynx card
2500                    ...
2501                 15 = /dev/pcilynx/aux15 AUX space of 16th PCILynx card
2502                 16 = /dev/pcilynx/rom0  ROM space of first PCILynx card
2503                    ...
2504                 31 = /dev/pcilynx/rom15 ROM space of 16th PCILynx card
2505                 32 = /dev/pcilynx/ram0  RAM space of first PCILynx card
2506                    ...
2507                 47 = /dev/pcilynx/ram15 RAM space of 16th PCILynx card
2508
2509178 char        Giganet cLAN1xxx virtual interface adapter
2510                  0 = /dev/clanvi0      First cLAN adapter
2511                  1 = /dev/clanvi1      Second cLAN adapter
2512                    ...
2513
2514179 block       MMC block devices
2515                  0 = /dev/mmcblk0      First SD/MMC card
2516                  1 = /dev/mmcblk0p1    First partition on first MMC card
2517                  8 = /dev/mmcblk1      Second SD/MMC card
2518                    ...
2519
2520                The start of next SD/MMC card can be configured with
2521                CONFIG_MMC_BLOCK_MINORS, or overridden at boot/modprobe
2522                time using the mmcblk.perdev_minors option. That would
2523                bump the offset between each card to be the configured
2524                value instead of the default 8.
2525
2526179 char        CCube DVXChip-based PCI products
2527                  0 = /dev/dvxirq0      First DVX device
2528                  1 = /dev/dvxirq1      Second DVX device
2529                    ...
2530
2531180 char        USB devices
2532                  0 = /dev/usb/lp0      First USB printer
2533                    ...
2534                 15 = /dev/usb/lp15     16th USB printer
2535                 48 = /dev/usb/scanner0 First USB scanner
2536                    ...
2537                 63 = /dev/usb/scanner15 16th USB scanner
2538                 64 = /dev/usb/rio500   Diamond Rio 500
2539                 65 = /dev/usb/usblcd   USBLCD Interface (info@usblcd.de)
2540                 66 = /dev/usb/cpad0    Synaptics cPad (mouse/LCD)
2541                 96 = /dev/usb/hiddev0  1st USB HID device
2542                    ...
2543                111 = /dev/usb/hiddev15 16th USB HID device
2544                112 = /dev/usb/auer0    1st auerswald ISDN device
2545                    ...
2546                127 = /dev/usb/auer15   16th auerswald ISDN device
2547                128 = /dev/usb/brlvgr0  First Braille Voyager device
2548                    ...
2549                131 = /dev/usb/brlvgr3  Fourth Braille Voyager device
2550                132 = /dev/usb/idmouse  ID Mouse (fingerprint scanner) device
2551                133 = /dev/usb/sisusbvga1       First SiSUSB VGA device
2552                    ...
2553                140 = /dev/usb/sisusbvga8       Eighth SISUSB VGA device
2554                144 = /dev/usb/lcd      USB LCD device
2555                160 = /dev/usb/legousbtower0    1st USB Legotower device
2556                    ...
2557                175 = /dev/usb/legousbtower15   16th USB Legotower device
2558                176 = /dev/usb/usbtmc1  First USB TMC device
2559                   ...
2560                191 = /dev/usb/usbtmc16 16th USB TMC device
2561                192 = /dev/usb/yurex1   First USB Yurex device
2562                   ...
2563                209 = /dev/usb/yurex16  16th USB Yurex device
2564                240 = /dev/usb/dabusb0  First daubusb device
2565                    ...
2566                243 = /dev/usb/dabusb3  Fourth dabusb device
2567
2568180 block       USB block devices
2569                  0 = /dev/uba          First USB block device
2570                  8 = /dev/ubb          Second USB block device
2571                 16 = /dev/ubc          Third USB block device
2572                    ...
2573
2574181 char        Conrad Electronic parallel port radio clocks
2575                  0 = /dev/pcfclock0    First Conrad radio clock
2576                  1 = /dev/pcfclock1    Second Conrad radio clock
2577                    ...
2578
2579182 char        Picture Elements THR2 binarizer
2580                  0 = /dev/pethr0       First THR2 board
2581                  1 = /dev/pethr1       Second THR2 board
2582                    ...
2583
2584183 char        SST 5136-DN DeviceNet interface
2585                  0 = /dev/ss5136dn0    First DeviceNet interface
2586                  1 = /dev/ss5136dn1    Second DeviceNet interface
2587                    ...
2588
2589                This device used to be assigned to major number 144.
2590                It had to be moved due to an unfortunate conflict.
2591
2592184 char        Picture Elements' video simulator/sender
2593                  0 = /dev/pevss0       First sender board
2594                  1 = /dev/pevss1       Second sender board
2595                    ...
2596
2597185 char        InterMezzo high availability file system
2598                  0 = /dev/intermezzo0  First cache manager
2599                  1 = /dev/intermezzo1  Second cache manager
2600                    ...
2601
2602                See http://web.archive.org/web/20080115195241/
2603                http://inter-mezzo.org/index.html
2604
2605186 char        Object-based storage control device
2606                  0 = /dev/obd0         First obd control device
2607                  1 = /dev/obd1         Second obd control device
2608                    ...
2609
2610                See ftp://ftp.lustre.org/pub/obd for code and information.
2611
2612187 char        DESkey hardware encryption device
2613                  0 = /dev/deskey0      First DES key
2614                  1 = /dev/deskey1      Second DES key
2615                    ...
2616
2617188 char        USB serial converters
2618                  0 = /dev/ttyUSB0      First USB serial converter
2619                  1 = /dev/ttyUSB1      Second USB serial converter
2620                    ...
2621
2622189 char        USB serial converters - alternate devices
2623                  0 = /dev/cuusb0       Callout device for ttyUSB0
2624                  1 = /dev/cuusb1       Callout device for ttyUSB1
2625                    ...
2626
2627190 char        Kansas City tracker/tuner card
2628                  0 = /dev/kctt0        First KCT/T card
2629                  1 = /dev/kctt1        Second KCT/T card
2630                    ...
2631
2632191 char        Reserved for PCMCIA
2633
2634192 char        Kernel profiling interface
2635                  0 = /dev/profile      Profiling control device
2636                  1 = /dev/profile0     Profiling device for CPU 0
2637                  2 = /dev/profile1     Profiling device for CPU 1
2638                    ...
2639
2640193 char        Kernel event-tracing interface
2641                  0 = /dev/trace        Tracing control device
2642                  1 = /dev/trace0       Tracing device for CPU 0
2643                  2 = /dev/trace1       Tracing device for CPU 1
2644                    ...
2645
2646194 char        linVideoStreams (LINVS)
2647                  0 = /dev/mvideo/status0       Video compression status
2648                  1 = /dev/mvideo/stream0       Video stream
2649                  2 = /dev/mvideo/frame0        Single compressed frame
2650                  3 = /dev/mvideo/rawframe0     Raw uncompressed frame
2651                  4 = /dev/mvideo/codec0        Direct codec access
2652                  5 = /dev/mvideo/video4linux0  Video4Linux compatibility
2653
2654                 16 = /dev/mvideo/status1       Second device
2655                    ...
2656                 32 = /dev/mvideo/status2       Third device
2657                    ...
2658                    ...
2659                240 = /dev/mvideo/status15      16th device
2660                    ...
2661
2662195 char        Nvidia graphics devices
2663                  0 = /dev/nvidia0              First Nvidia card
2664                  1 = /dev/nvidia1              Second Nvidia card
2665                    ...
2666                255 = /dev/nvidiactl            Nvidia card control device
2667
2668196 char        Tormenta T1 card
2669                  0 = /dev/tor/0                Master control channel for all cards
2670                  1 = /dev/tor/1                First DS0
2671                  2 = /dev/tor/2                Second DS0
2672                    ...
2673                 48 = /dev/tor/48               48th DS0
2674                 49 = /dev/tor/49               First pseudo-channel
2675                 50 = /dev/tor/50               Second pseudo-channel
2676                    ...
2677
2678197 char        OpenTNF tracing facility
2679                  0 = /dev/tnf/t0               Trace 0 data extraction
2680                  1 = /dev/tnf/t1               Trace 1 data extraction
2681                    ...
2682                128 = /dev/tnf/status           Tracing facility status
2683                130 = /dev/tnf/trace            Tracing device
2684
2685198 char        Total Impact TPMP2 quad coprocessor PCI card
2686                  0 = /dev/tpmp2/0              First card
2687                  1 = /dev/tpmp2/1              Second card
2688                    ...
2689
2690199 char        Veritas volume manager (VxVM) volumes
2691                  0 = /dev/vx/rdsk/*/*          First volume
2692                  1 = /dev/vx/rdsk/*/*          Second volume
2693                    ...
2694
2695199 block       Veritas volume manager (VxVM) volumes
2696                  0 = /dev/vx/dsk/*/*           First volume
2697                  1 = /dev/vx/dsk/*/*           Second volume
2698                    ...
2699
2700                The namespace in these directories is maintained by
2701                the user space VxVM software.
2702
2703200 char        Veritas VxVM configuration interface
2704                  0 = /dev/vx/config            Configuration access node
2705                  1 = /dev/vx/trace             Volume i/o trace access node
2706                  2 = /dev/vx/iod               Volume i/o daemon access node
2707                  3 = /dev/vx/info              Volume information access node
2708                  4 = /dev/vx/task              Volume tasks access node
2709                  5 = /dev/vx/taskmon           Volume tasks monitor daemon
2710
2711201 char        Veritas VxVM dynamic multipathing driver
2712                  0 = /dev/vx/rdmp/*            First multipath device
2713                  1 = /dev/vx/rdmp/*            Second multipath device
2714                    ...
2715201 block       Veritas VxVM dynamic multipathing driver
2716                  0 = /dev/vx/dmp/*             First multipath device
2717                  1 = /dev/vx/dmp/*             Second multipath device
2718                    ...
2719
2720                The namespace in these directories is maintained by
2721                the user space VxVM software.
2722
2723202 char        CPU model-specific registers
2724                  0 = /dev/cpu/0/msr            MSRs on CPU 0
2725                  1 = /dev/cpu/1/msr            MSRs on CPU 1
2726                    ...
2727
2728202 block       Xen Virtual Block Device
2729                  0 = /dev/xvda       First Xen VBD whole disk
2730                  16 = /dev/xvdb      Second Xen VBD whole disk
2731                  32 = /dev/xvdc      Third Xen VBD whole disk
2732                    ...
2733                  240 = /dev/xvdp     Sixteenth Xen VBD whole disk
2734
2735                Partitions are handled in the same way as for IDE
2736                disks (see major number 3) except that the limit on
2737                partitions is 15.
2738
2739203 char        CPU CPUID information
2740                  0 = /dev/cpu/0/cpuid          CPUID on CPU 0
2741                  1 = /dev/cpu/1/cpuid          CPUID on CPU 1
2742                    ...
2743
2744204 char        Low-density serial ports
2745                  0 = /dev/ttyLU0               LinkUp Systems L72xx UART - port 0
2746                  1 = /dev/ttyLU1               LinkUp Systems L72xx UART - port 1
2747                  2 = /dev/ttyLU2               LinkUp Systems L72xx UART - port 2
2748                  3 = /dev/ttyLU3               LinkUp Systems L72xx UART - port 3
2749                  4 = /dev/ttyFB0               Intel Footbridge (ARM)
2750                  5 = /dev/ttySA0               StrongARM builtin serial port 0
2751                  6 = /dev/ttySA1               StrongARM builtin serial port 1
2752                  7 = /dev/ttySA2               StrongARM builtin serial port 2
2753                  8 = /dev/ttySC0               SCI serial port (SuperH) - port 0
2754                  9 = /dev/ttySC1               SCI serial port (SuperH) - port 1
2755                 10 = /dev/ttySC2               SCI serial port (SuperH) - port 2
2756                 11 = /dev/ttySC3               SCI serial port (SuperH) - port 3
2757                 12 = /dev/ttyFW0               Firmware console - port 0
2758                 13 = /dev/ttyFW1               Firmware console - port 1
2759                 14 = /dev/ttyFW2               Firmware console - port 2
2760                 15 = /dev/ttyFW3               Firmware console - port 3
2761                 16 = /dev/ttyAM0               ARM "AMBA" serial port 0
2762                    ...
2763                 31 = /dev/ttyAM15              ARM "AMBA" serial port 15
2764                 32 = /dev/ttyDB0               DataBooster serial port 0
2765                    ...
2766                 39 = /dev/ttyDB7               DataBooster serial port 7
2767                 40 = /dev/ttySG0               SGI Altix console port
2768                 41 = /dev/ttySMX0              Motorola i.MX - port 0
2769                 42 = /dev/ttySMX1              Motorola i.MX - port 1
2770                 43 = /dev/ttySMX2              Motorola i.MX - port 2
2771                 44 = /dev/ttyMM0               Marvell MPSC - port 0
2772                 45 = /dev/ttyMM1               Marvell MPSC - port 1
2773                 46 = /dev/ttyCPM0              PPC CPM (SCC or SMC) - port 0
2774                    ...
2775                 47 = /dev/ttyCPM5              PPC CPM (SCC or SMC) - port 5
2776                 50 = /dev/ttyIOC0              Altix serial card
2777                    ...
2778                 81 = /dev/ttyIOC31             Altix serial card
2779                 82 = /dev/ttyVR0               NEC VR4100 series SIU
2780                 83 = /dev/ttyVR1               NEC VR4100 series DSIU
2781                 84 = /dev/ttyIOC84             Altix ioc4 serial card
2782                    ...
2783                 115 = /dev/ttyIOC115           Altix ioc4 serial card
2784                 116 = /dev/ttySIOC0            Altix ioc3 serial card
2785                    ...
2786                 147 = /dev/ttySIOC31           Altix ioc3 serial card
2787                 148 = /dev/ttyPSC0             PPC PSC - port 0
2788                    ...
2789                 153 = /dev/ttyPSC5             PPC PSC - port 5
2790                 154 = /dev/ttyAT0              ATMEL serial port 0
2791                    ...
2792                 169 = /dev/ttyAT15             ATMEL serial port 15
2793                 170 = /dev/ttyNX0              Hilscher netX serial port 0
2794                    ...
2795                 185 = /dev/ttyNX15             Hilscher netX serial port 15
2796                 186 = /dev/ttyJ0               JTAG1 DCC protocol based serial port emulation
2797                 187 = /dev/ttyUL0              Xilinx uartlite - port 0
2798                    ...
2799                 190 = /dev/ttyUL3              Xilinx uartlite - port 3
2800                 191 = /dev/xvc0                Xen virtual console - port 0
2801                 192 = /dev/ttyPZ0              pmac_zilog - port 0
2802                    ...
2803                 195 = /dev/ttyPZ3              pmac_zilog - port 3
2804                 196 = /dev/ttyTX0              TX39/49 serial port 0
2805                    ...
2806                 204 = /dev/ttyTX7              TX39/49 serial port 7
2807                 205 = /dev/ttySC0              SC26xx serial port 0
2808                 206 = /dev/ttySC1              SC26xx serial port 1
2809                 207 = /dev/ttySC2              SC26xx serial port 2
2810                 208 = /dev/ttySC3              SC26xx serial port 3
2811                 209 = /dev/ttyMAX0             MAX3100 serial port 0
2812                 210 = /dev/ttyMAX1             MAX3100 serial port 1
2813                 211 = /dev/ttyMAX2             MAX3100 serial port 2
2814                 212 = /dev/ttyMAX3             MAX3100 serial port 3
2815
2816205 char        Low-density serial ports (alternate device)
2817                  0 = /dev/culu0                Callout device for ttyLU0
2818                  1 = /dev/culu1                Callout device for ttyLU1
2819                  2 = /dev/culu2                Callout device for ttyLU2
2820                  3 = /dev/culu3                Callout device for ttyLU3
2821                  4 = /dev/cufb0                Callout device for ttyFB0
2822                  5 = /dev/cusa0                Callout device for ttySA0
2823                  6 = /dev/cusa1                Callout device for ttySA1
2824                  7 = /dev/cusa2                Callout device for ttySA2
2825                  8 = /dev/cusc0                Callout device for ttySC0
2826                  9 = /dev/cusc1                Callout device for ttySC1
2827                 10 = /dev/cusc2                Callout device for ttySC2
2828                 11 = /dev/cusc3                Callout device for ttySC3
2829                 12 = /dev/cufw0                Callout device for ttyFW0
2830                 13 = /dev/cufw1                Callout device for ttyFW1
2831                 14 = /dev/cufw2                Callout device for ttyFW2
2832                 15 = /dev/cufw3                Callout device for ttyFW3
2833                 16 = /dev/cuam0                Callout device for ttyAM0
2834                    ...
2835                 31 = /dev/cuam15               Callout device for ttyAM15
2836                 32 = /dev/cudb0                Callout device for ttyDB0
2837                    ...
2838                 39 = /dev/cudb7                Callout device for ttyDB7
2839                 40 = /dev/cusg0                Callout device for ttySG0
2840                 41 = /dev/ttycusmx0            Callout device for ttySMX0
2841                 42 = /dev/ttycusmx1            Callout device for ttySMX1
2842                 43 = /dev/ttycusmx2            Callout device for ttySMX2
2843                 46 = /dev/cucpm0               Callout device for ttyCPM0
2844                    ...
2845                 49 = /dev/cucpm5               Callout device for ttyCPM5
2846                 50 = /dev/cuioc40              Callout device for ttyIOC40
2847                    ...
2848                 81 = /dev/cuioc431             Callout device for ttyIOC431
2849                 82 = /dev/cuvr0                Callout device for ttyVR0
2850                 83 = /dev/cuvr1                Callout device for ttyVR1
2851
2852206 char        OnStream SC-x0 tape devices
2853                  0 = /dev/osst0                First OnStream SCSI tape, mode 0
2854                  1 = /dev/osst1                Second OnStream SCSI tape, mode 0
2855                    ...
2856                 32 = /dev/osst0l               First OnStream SCSI tape, mode 1
2857                 33 = /dev/osst1l               Second OnStream SCSI tape, mode 1
2858                    ...
2859                 64 = /dev/osst0m               First OnStream SCSI tape, mode 2
2860                 65 = /dev/osst1m               Second OnStream SCSI tape, mode 2
2861                    ...
2862                 96 = /dev/osst0a               First OnStream SCSI tape, mode 3
2863                 97 = /dev/osst1a               Second OnStream SCSI tape, mode 3
2864                    ...
2865                128 = /dev/nosst0               No rewind version of /dev/osst0
2866                129 = /dev/nosst1               No rewind version of /dev/osst1
2867                    ...
2868                160 = /dev/nosst0l              No rewind version of /dev/osst0l
2869                161 = /dev/nosst1l              No rewind version of /dev/osst1l
2870                    ...
2871                192 = /dev/nosst0m              No rewind version of /dev/osst0m
2872                193 = /dev/nosst1m              No rewind version of /dev/osst1m
2873                    ...
2874                224 = /dev/nosst0a              No rewind version of /dev/osst0a
2875                225 = /dev/nosst1a              No rewind version of /dev/osst1a
2876                    ...
2877
2878                The OnStream SC-x0 SCSI tapes do not support the
2879                standard SCSI SASD command set and therefore need
2880                their own driver "osst". Note that the IDE, USB (and
2881                maybe ParPort) versions may be driven via ide-scsi or
2882                usb-storage SCSI emulation and this osst device and
2883                driver as well.  The ADR-x0 drives are QIC-157
2884                compliant and don't need osst.
2885
2886207 char        Compaq ProLiant health feature indicate
2887                  0 = /dev/cpqhealth/cpqw       Redirector interface
2888                  1 = /dev/cpqhealth/crom       EISA CROM
2889                  2 = /dev/cpqhealth/cdt        Data Table
2890                  3 = /dev/cpqhealth/cevt       Event Log
2891                  4 = /dev/cpqhealth/casr       Automatic Server Recovery
2892                  5 = /dev/cpqhealth/cecc       ECC Memory
2893                  6 = /dev/cpqhealth/cmca       Machine Check Architecture
2894                  7 = /dev/cpqhealth/ccsm       Deprecated CDT
2895                  8 = /dev/cpqhealth/cnmi       NMI Handling
2896                  9 = /dev/cpqhealth/css        Sideshow Management
2897                 10 = /dev/cpqhealth/cram       CMOS interface
2898                 11 = /dev/cpqhealth/cpci       PCI IRQ interface
2899
2900208 char        User space serial ports
2901                  0 = /dev/ttyU0                First user space serial port
2902                  1 = /dev/ttyU1                Second user space serial port
2903                    ...
2904
2905209 char        User space serial ports (alternate devices)
2906                  0 = /dev/cuu0                 Callout device for ttyU0
2907                  1 = /dev/cuu1                 Callout device for ttyU1
2908                    ...
2909
2910210 char        SBE, Inc. sync/async serial card
2911                  0 = /dev/sbei/wxcfg0          Configuration device for board 0
2912                  1 = /dev/sbei/dld0            Download device for board 0
2913                  2 = /dev/sbei/wan00           WAN device, port 0, board 0
2914                  3 = /dev/sbei/wan01           WAN device, port 1, board 0
2915                  4 = /dev/sbei/wan02           WAN device, port 2, board 0
2916                  5 = /dev/sbei/wan03           WAN device, port 3, board 0
2917                  6 = /dev/sbei/wanc00          WAN clone device, port 0, board 0
2918                  7 = /dev/sbei/wanc01          WAN clone device, port 1, board 0
2919                  8 = /dev/sbei/wanc02          WAN clone device, port 2, board 0
2920                  9 = /dev/sbei/wanc03          WAN clone device, port 3, board 0
2921                 10 = /dev/sbei/wxcfg1          Configuration device for board 1
2922                 11 = /dev/sbei/dld1            Download device for board 1
2923                 12 = /dev/sbei/wan10           WAN device, port 0, board 1
2924                 13 = /dev/sbei/wan11           WAN device, port 1, board 1
2925                 14 = /dev/sbei/wan12           WAN device, port 2, board 1
2926                 15 = /dev/sbei/wan13           WAN device, port 3, board 1
2927                 16 = /dev/sbei/wanc10          WAN clone device, port 0, board 1
2928                 17 = /dev/sbei/wanc11          WAN clone device, port 1, board 1
2929                 18 = /dev/sbei/wanc12          WAN clone device, port 2, board 1
2930                 19 = /dev/sbei/wanc13          WAN clone device, port 3, board 1
2931                    ...
2932
2933                Yes, each board is really spaced 10 (decimal) apart.
2934
2935211 char        Addinum CPCI1500 digital I/O card
2936                  0 = /dev/addinum/cpci1500/0   First CPCI1500 card
2937                  1 = /dev/addinum/cpci1500/1   Second CPCI1500 card
2938                    ...
2939
2940212 char        LinuxTV.org DVB driver subsystem
2941                  0 = /dev/dvb/adapter0/video0    first video decoder of first card
2942                  1 = /dev/dvb/adapter0/audio0    first audio decoder of first card
2943                  2 = /dev/dvb/adapter0/sec0      (obsolete/unused)
2944                  3 = /dev/dvb/adapter0/frontend0 first frontend device of first card
2945                  4 = /dev/dvb/adapter0/demux0    first demux device of first card
2946                  5 = /dev/dvb/adapter0/dvr0      first digital video recoder device of first card
2947                  6 = /dev/dvb/adapter0/ca0       first common access port of first card
2948                  7 = /dev/dvb/adapter0/net0      first network device of first card
2949                  8 = /dev/dvb/adapter0/osd0      first on-screen-display device of first card
2950                  9 = /dev/dvb/adapter0/video1    second video decoder of first card
2951                    ...
2952                 64 = /dev/dvb/adapter1/video0    first video decoder of second card
2953                    ...
2954                128 = /dev/dvb/adapter2/video0    first video decoder of third card
2955                    ...
2956                196 = /dev/dvb/adapter3/video0    first video decoder of fourth card
2957
2958216 char        Bluetooth RFCOMM TTY devices
2959                  0 = /dev/rfcomm0              First Bluetooth RFCOMM TTY device
2960                  1 = /dev/rfcomm1              Second Bluetooth RFCOMM TTY device
2961                    ...
2962
2963217 char        Bluetooth RFCOMM TTY devices (alternate devices)
2964                  0 = /dev/curf0                Callout device for rfcomm0
2965                  1 = /dev/curf1                Callout device for rfcomm1
2966                    ...
2967
2968218 char        The Logical Company bus Unibus/Qbus adapters
2969                  0 = /dev/logicalco/bci/0      First bus adapter
2970                  1 = /dev/logicalco/bci/1      First bus adapter
2971                    ...
2972
2973219 char        The Logical Company DCI-1300 digital I/O card
2974                  0 = /dev/logicalco/dci1300/0  First DCI-1300 card
2975                  1 = /dev/logicalco/dci1300/1  Second DCI-1300 card
2976                    ...
2977
2978220 char        Myricom Myrinet "GM" board
2979                  0 = /dev/myricom/gm0          First Myrinet GM board
2980                  1 = /dev/myricom/gmp0         First board "root access"
2981                  2 = /dev/myricom/gm1          Second Myrinet GM board
2982                  3 = /dev/myricom/gmp1         Second board "root access"
2983                    ...
2984
2985221 char        VME bus
2986                  0 = /dev/bus/vme/m0           First master image
2987                  1 = /dev/bus/vme/m1           Second master image
2988                  2 = /dev/bus/vme/m2           Third master image
2989                  3 = /dev/bus/vme/m3           Fourth master image
2990                  4 = /dev/bus/vme/s0           First slave image
2991                  5 = /dev/bus/vme/s1           Second slave image
2992                  6 = /dev/bus/vme/s2           Third slave image
2993                  7 = /dev/bus/vme/s3           Fourth slave image
2994                  8 = /dev/bus/vme/ctl          Control
2995
2996                It is expected that all VME bus drivers will use the
2997                same interface.  For interface documentation see
2998                http://www.vmelinux.org/.
2999
3000224 char        A2232 serial card
3001                  0 = /dev/ttyY0                First A2232 port
3002                  1 = /dev/ttyY1                Second A2232 port
3003                    ...
3004
3005225 char        A2232 serial card (alternate devices)
3006                  0 = /dev/cuy0                 Callout device for ttyY0
3007                  1 = /dev/cuy1                 Callout device for ttyY1
3008                    ...
3009
3010226 char        Direct Rendering Infrastructure (DRI)
3011                  0 = /dev/dri/card0            First graphics card
3012                  1 = /dev/dri/card1            Second graphics card
3013                    ...
3014
3015227 char        IBM 3270 terminal Unix tty access
3016                  1 = /dev/3270/tty1            First 3270 terminal
3017                  2 = /dev/3270/tty2            Seconds 3270 terminal
3018                    ...
3019
3020228 char        IBM 3270 terminal block-mode access
3021                  0 = /dev/3270/tub             Controlling interface
3022                  1 = /dev/3270/tub1            First 3270 terminal
3023                  2 = /dev/3270/tub2            Second 3270 terminal
3024                    ...
3025
3026229 char        IBM iSeries/pSeries virtual console
3027                  0 = /dev/hvc0                 First console port
3028                  1 = /dev/hvc1                 Second console port
3029                    ...
3030
3031230 char        IBM iSeries virtual tape
3032                  0 = /dev/iseries/vt0          First virtual tape, mode 0
3033                  1 = /dev/iseries/vt1          Second virtual tape, mode 0
3034                    ...
3035                 32 = /dev/iseries/vt0l         First virtual tape, mode 1
3036                 33 = /dev/iseries/vt1l         Second virtual tape, mode 1
3037                    ...
3038                 64 = /dev/iseries/vt0m         First virtual tape, mode 2
3039                 65 = /dev/iseries/vt1m         Second virtual tape, mode 2
3040                    ...
3041                 96 = /dev/iseries/vt0a         First virtual tape, mode 3
3042                 97 = /dev/iseries/vt1a         Second virtual tape, mode 3
3043                      ...
3044                128 = /dev/iseries/nvt0         First virtual tape, mode 0, no rewind
3045                129 = /dev/iseries/nvt1         Second virtual tape, mode 0, no rewind
3046                    ...
3047                160 = /dev/iseries/nvt0l        First virtual tape, mode 1, no rewind
3048                161 = /dev/iseries/nvt1l        Second virtual tape, mode 1, no rewind
3049                    ...
3050                192 = /dev/iseries/nvt0m        First virtual tape, mode 2, no rewind
3051                193 = /dev/iseries/nvt1m        Second virtual tape, mode 2, no rewind
3052                    ...
3053                224 = /dev/iseries/nvt0a        First virtual tape, mode 3, no rewind
3054                225 = /dev/iseries/nvt1a        Second virtual tape, mode 3, no rewind
3055                    ...
3056
3057                "No rewind" refers to the omission of the default
3058                automatic rewind on device close.  The MTREW or MTOFFL
3059                ioctl()'s can be used to rewind the tape regardless of
3060                the device used to access it.
3061
3062231 char        InfiniBand
3063                0 = /dev/infiniband/umad0
3064                1 = /dev/infiniband/umad1
3065                  ...
3066                63 = /dev/infiniband/umad63    63rd InfiniBandMad device
3067                64 = /dev/infiniband/issm0     First InfiniBand IsSM device
3068                65 = /dev/infiniband/issm1     Second InfiniBand IsSM device
3069                  ...
3070                127 = /dev/infiniband/issm63    63rd InfiniBand IsSM device
3071                128 = /dev/infiniband/uverbs0   First InfiniBand verbs device
3072                129 = /dev/infiniband/uverbs1   Second InfiniBand verbs device
3073                  ...
3074                159 = /dev/infiniband/uverbs31  31st InfiniBand verbs device
3075
3076232 char        Biometric Devices
3077                0 = /dev/biometric/sensor0/fingerprint  first fingerprint sensor on first device
3078                1 = /dev/biometric/sensor0/iris         first iris sensor on first device
3079                2 = /dev/biometric/sensor0/retina       first retina sensor on first device
3080                3 = /dev/biometric/sensor0/voiceprint   first voiceprint sensor on first device
3081                4 = /dev/biometric/sensor0/facial       first facial sensor on first device
3082                5 = /dev/biometric/sensor0/hand         first hand sensor on first device
3083                  ...
3084                10 = /dev/biometric/sensor1/fingerprint first fingerprint sensor on second device
3085                  ...
3086                20 = /dev/biometric/sensor2/fingerprint first fingerprint sensor on third device
3087                  ...
3088
3089233 char        PathScale InfiniPath interconnect
3090                0 = /dev/ipath        Primary device for programs (any unit)
3091                1 = /dev/ipath0       Access specifically to unit 0
3092                2 = /dev/ipath1       Access specifically to unit 1
3093                  ...
3094                4 = /dev/ipath3       Access specifically to unit 3
3095                129 = /dev/ipath_sma    Device used by Subnet Management Agent
3096                130 = /dev/ipath_diag   Device used by diagnostics programs
3097
3098234-239         UNASSIGNED
3099
3100240-254 char    LOCAL/EXPERIMENTAL USE
3101
3102240-254 block   LOCAL/EXPERIMENTAL USE
3103                Allocated for local/experimental use.  For devices not
3104                assigned official numbers, these ranges should be
3105                used in order to avoid conflicting with future assignments.
3106
3107255 char        RESERVED
3108
3109255 block       RESERVED
3110
3111                This major is reserved to assist the expansion to a
3112                larger number space.  No device nodes with this major
3113                should ever be created on the filesystem.
3114                (This is probably not true anymore, but I'll leave it
3115                for now /Torben)
3116
3117---LARGE MAJORS!!!!!---
3118
3119256 char        Equinox SST multi-port serial boards
3120                   0 = /dev/ttyEQ0      First serial port on first Equinox SST board
3121                 127 = /dev/ttyEQ127    Last serial port on first Equinox SST board
3122                 128 = /dev/ttyEQ128    First serial port on second Equinox SST board
3123                  ...
3124                1027 = /dev/ttyEQ1027   Last serial port on eighth Equinox SST board
3125
3126256 block       Resident Flash Disk Flash Translation Layer
3127                  0 = /dev/rfda         First RFD FTL layer
3128                 16 = /dev/rfdb         Second RFD FTL layer
3129                  ...
3130                240 = /dev/rfdp         16th RFD FTL layer
3131
3132257 char        Phoenix Technologies Cryptographic Services Driver
3133                  0 = /dev/ptlsec       Crypto Services Driver
3134
3135257 block       SSFDC Flash Translation Layer filesystem
3136                  0 = /dev/ssfdca       First SSFDC layer
3137                  8 = /dev/ssfdcb       Second SSFDC layer
3138                 16 = /dev/ssfdcc       Third SSFDC layer
3139                 24 = /dev/ssfdcd       4th SSFDC layer
3140                 32 = /dev/ssfdce       5th SSFDC layer
3141                 40 = /dev/ssfdcf       6th SSFDC layer
3142                 48 = /dev/ssfdcg       7th SSFDC layer
3143                 56 = /dev/ssfdch       8th SSFDC layer
3144
3145258 block       ROM/Flash read-only translation layer
3146                  0 = /dev/blockrom0    First ROM card's translation layer interface
3147                  1 = /dev/blockrom1    Second ROM card's translation layer interface
3148                  ...
3149
3150259 block       Block Extended Major
3151                  Used dynamically to hold additional partition minor
3152                  numbers and allow large numbers of partitions per device
3153
3154259 char        FPGA configuration interfaces
3155                  0 = /dev/icap0        First Xilinx internal configuration
3156                  1 = /dev/icap1        Second Xilinx internal configuration
3157
3158260 char        OSD (Object-based-device) SCSI Device
3159                  0 = /dev/osd0         First OSD Device
3160                  1 = /dev/osd1         Second OSD Device
3161                  ...
3162                  255 = /dev/osd255     256th OSD Device
3163
3164 ****   ADDITIONAL /dev DIRECTORY ENTRIES
3165
3166This section details additional entries that should or may exist in
3167the /dev directory.  It is preferred that symbolic links use the same
3168form (absolute or relative) as is indicated here.  Links are
3169classified as "hard" or "symbolic" depending on the preferred type of
3170link; if possible, the indicated type of link should be used.
3171
3172
3173        Compulsory links
3174
3175These links should exist on all systems:
3176
3177/dev/fd         /proc/self/fd   symbolic        File descriptors
3178/dev/stdin      fd/0            symbolic        stdin file descriptor
3179/dev/stdout     fd/1            symbolic        stdout file descriptor
3180/dev/stderr     fd/2            symbolic        stderr file descriptor
3181/dev/nfsd       socksys         symbolic        Required by iBCS-2
3182/dev/X0R        null            symbolic        Required by iBCS-2
3183
3184Note: /dev/X0R is <letter X>-<digit 0>-<letter R>.
3185
3186        Recommended links
3187
3188It is recommended that these links exist on all systems:
3189
3190/dev/core       /proc/kcore     symbolic        Backward compatibility
3191/dev/ramdisk    ram0            symbolic        Backward compatibility
3192/dev/ftape      qft0            symbolic        Backward compatibility
3193/dev/bttv0      video0          symbolic        Backward compatibility
3194/dev/radio      radio0          symbolic        Backward compatibility
3195/dev/i2o*       /dev/i2o/*      symbolic        Backward compatibility
3196/dev/scd?       sr?             hard            Alternate SCSI CD-ROM name
3197
3198        Locally defined links
3199
3200The following links may be established locally to conform to the
3201configuration of the system.  This is merely a tabulation of existing
3202practice, and does not constitute a recommendation.  However, if they
3203exist, they should have the following uses.
3204
3205/dev/mouse      mouse port      symbolic        Current mouse device
3206/dev/tape       tape device     symbolic        Current tape device
3207/dev/cdrom      CD-ROM device   symbolic        Current CD-ROM device
3208/dev/cdwriter   CD-writer       symbolic        Current CD-writer device
3209/dev/scanner    scanner         symbolic        Current scanner device
3210/dev/modem      modem port      symbolic        Current dialout device
3211/dev/root       root device     symbolic        Current root filesystem
3212/dev/swap       swap device     symbolic        Current swap device
3213
3214/dev/modem should not be used for a modem which supports dialin as
3215well as dialout, as it tends to cause lock file problems.  If it
3216exists, /dev/modem should point to the appropriate primary TTY device
3217(the use of the alternate callout devices is deprecated).
3218
3219For SCSI devices, /dev/tape and /dev/cdrom should point to the
3220``cooked'' devices (/dev/st* and /dev/sr*, respectively), whereas
3221/dev/cdwriter and /dev/scanner should point to the appropriate generic
3222SCSI devices (/dev/sg*).
3223
3224/dev/mouse may point to a primary serial TTY device, a hardware mouse
3225device, or a socket for a mouse driver program (e.g. /dev/gpmdata).
3226
3227        Sockets and pipes
3228
3229Non-transient sockets and named pipes may exist in /dev.  Common entries are:
3230
3231/dev/printer    socket          lpd local socket
3232/dev/log        socket          syslog local socket
3233/dev/gpmdata    socket          gpm mouse multiplexer
3234
3235        Mount points
3236
3237The following names are reserved for mounting special filesystems
3238under /dev.  These special filesystems provide kernel interfaces that
3239cannot be provided with standard device nodes.
3240
3241/dev/pts        devpts          PTY slave filesystem
3242/dev/shm        tmpfs           POSIX shared memory maintenance access
3243
3244 ****   TERMINAL DEVICES
3245
3246Terminal, or TTY devices are a special class of character devices.  A
3247terminal device is any device that could act as a controlling terminal
3248for a session; this includes virtual consoles, serial ports, and
3249pseudoterminals (PTYs).
3250
3251All terminal devices share a common set of capabilities known as line
3252disciplines; these include the common terminal line discipline as well
3253as SLIP and PPP modes.
3254
3255All terminal devices are named similarly; this section explains the
3256naming and use of the various types of TTYs.  Note that the naming
3257conventions include several historical warts; some of these are
3258Linux-specific, some were inherited from other systems, and some
3259reflect Linux outgrowing a borrowed convention.
3260
3261A hash mark (#) in a device name is used here to indicate a decimal
3262number without leading zeroes.
3263
3264        Virtual consoles and the console device
3265
3266Virtual consoles are full-screen terminal displays on the system video
3267monitor.  Virtual consoles are named /dev/tty#, with numbering
3268starting at /dev/tty1; /dev/tty0 is the current virtual console.
3269/dev/tty0 is the device that should be used to access the system video
3270card on those architectures for which the frame buffer devices
3271(/dev/fb*) are not applicable.  Do not use /dev/console
3272for this purpose.
3273
3274The console device, /dev/console, is the device to which system
3275messages should be sent, and on which logins should be permitted in
3276single-user mode.  Starting with Linux 2.1.71, /dev/console is managed
3277by the kernel; for previous versions it should be a symbolic link to
3278either /dev/tty0, a specific virtual console such as /dev/tty1, or to
3279a serial port primary (tty*, not cu*) device, depending on the
3280configuration of the system.
3281
3282        Serial ports
3283
3284Serial ports are RS-232 serial ports and any device which simulates
3285one, either in hardware (such as internal modems) or in software (such
3286as the ISDN driver.)  Under Linux, each serial ports has two device
3287names, the primary or callin device and the alternate or callout one.
3288Each kind of device is indicated by a different letter.  For any
3289letter X, the names of the devices are /dev/ttyX# and /dev/cux#,
3290respectively; for historical reasons, /dev/ttyS# and /dev/ttyC#
3291correspond to /dev/cua# and /dev/cub#.  In the future, it should be
3292expected that multiple letters will be used; all letters will be upper
3293case for the "tty" device (e.g. /dev/ttyDP#) and lower case for the
3294"cu" device (e.g. /dev/cudp#).
3295
3296The names /dev/ttyQ# and /dev/cuq# are reserved for local use.
3297
3298The alternate devices provide for kernel-based exclusion and somewhat
3299different defaults than the primary devices.  Their main purpose is to
3300allow the use of serial ports with programs with no inherent or broken
3301support for serial ports.  Their use is deprecated, and they may be
3302removed from a future version of Linux.
3303
3304Arbitration of serial ports is provided by the use of lock files with
3305the names /var/lock/LCK..ttyX#.  The contents of the lock file should
3306be the PID of the locking process as an ASCII number.
3307
3308It is common practice to install links such as /dev/modem
3309which point to serial ports.  In order to ensure proper locking in the
3310presence of these links, it is recommended that software chase
3311symlinks and lock all possible names; additionally, it is recommended
3312that a lock file be installed with the corresponding alternate
3313device.  In order to avoid deadlocks, it is recommended that the locks
3314are acquired in the following order, and released in the reverse:
3315
3316        1. The symbolic link name, if any (/var/lock/LCK..modem)
3317        2. The "tty" name (/var/lock/LCK..ttyS2)
3318        3. The alternate device name (/var/lock/LCK..cua2)
3319
3320In the case of nested symbolic links, the lock files should be
3321installed in the order the symlinks are resolved.
3322
3323Under no circumstances should an application hold a lock while waiting
3324for another to be released.  In addition, applications which attempt
3325to create lock files for the corresponding alternate device names
3326should take into account the possibility of being used on a non-serial
3327port TTY, for which no alternate device would exist.
3328
3329        Pseudoterminals (PTYs)
3330
3331Pseudoterminals, or PTYs, are used to create login sessions or provide
3332other capabilities requiring a TTY line discipline (including SLIP or
3333PPP capability) to arbitrary data-generation processes.  Each PTY has
3334a master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named
3335/dev/tty[p-za-e][0-9a-f].  The kernel arbitrates the use of PTYs by
3336allowing each master side to be opened only once.
3337
3338Once the master side has been opened, the corresponding slave device
3339can be used in the same manner as any TTY device.  The master and
3340slave devices are connected by the kernel, generating the equivalent
3341of a bidirectional pipe with TTY capabilities.
3342
3343Recent versions of the Linux kernels and GNU libc contain support for
3344the System V/Unix98 naming scheme for PTYs, which assigns a common
3345device, /dev/ptmx, to all the masters (opening it will automatically
3346give you a previously unassigned PTY) and a subdirectory, /dev/pts,
3347for the slaves; the slaves are named with decimal integers (/dev/pts/#
3348in our notation).  This removes the problem of exhausting the
3349namespace and enables the kernel to automatically create the device
3350nodes for the slaves on demand using the "devpts" filesystem.
3351
3352
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.