linux/Documentation/devices.txt
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   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  17The LaTeX version of this document is no longer maintained.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  26The symbol {2.6} means the allocation is obsolete and scheduled for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, reads
 102                                        export the buffered printk records.
 103                 12 = /dev/oldmem       OBSOLETE - replaced by /proc/vmcore
 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                237 = /dev/loop-control Loopback control device
 451                238 = /dev/vhost-net    Host kernel accelerator for virtio net
 452
 453                240-254                 Reserved for local use
 454                255                     Reserved for MISC_DYNAMIC_MINOR
 455
 456 11 char        Raw keyboard device     (Linux/SPARC only)
 457                  0 = /dev/kbd          Raw keyboard device
 458
 459 11 char        Serial Mux device       (Linux/PA-RISC only)
 460                  0 = /dev/ttyB0        First mux port
 461                  1 = /dev/ttyB1        Second mux port
 462                    ...
 463
 464 11 block       SCSI CD-ROM devices
 465                  0 = /dev/scd0         First SCSI CD-ROM
 466                  1 = /dev/scd1         Second SCSI CD-ROM
 467                    ...
 468
 469                The prefix /dev/sr (instead of /dev/scd) has been deprecated.
 470
 471 12 char        QIC-02 tape
 472                  2 = /dev/ntpqic11     QIC-11, no rewind-on-close
 473                  3 = /dev/tpqic11      QIC-11, rewind-on-close
 474                  4 = /dev/ntpqic24     QIC-24, no rewind-on-close
 475                  5 = /dev/tpqic24      QIC-24, rewind-on-close
 476                  6 = /dev/ntpqic120    QIC-120, no rewind-on-close
 477                  7 = /dev/tpqic120     QIC-120, rewind-on-close
 478                  8 = /dev/ntpqic150    QIC-150, no rewind-on-close
 479                  9 = /dev/tpqic150     QIC-150, rewind-on-close
 480
 481                The device names specified are proposed -- if there
 482                are "standard" names for these devices, please let me know.
 483
 484 12 block
 485
 486 13 char        Input core
 487                  0 = /dev/input/js0    First joystick
 488                  1 = /dev/input/js1    Second joystick
 489                    ...
 490                 32 = /dev/input/mouse0 First mouse
 491                 33 = /dev/input/mouse1 Second mouse
 492                    ...
 493                 63 = /dev/input/mice   Unified mouse
 494                 64 = /dev/input/event0 First event queue
 495                 65 = /dev/input/event1 Second event queue
 496                    ...
 497
 498                Each device type has 5 bits (32 minors).
 499
 500 13 block       Previously used for the XT disk (/dev/xdN)
 501                Deleted in kernel v3.9.
 502
 503 14 char        Open Sound System (OSS)
 504                  0 = /dev/mixer        Mixer control
 505                  1 = /dev/sequencer    Audio sequencer
 506                  2 = /dev/midi00       First MIDI port
 507                  3 = /dev/dsp          Digital audio
 508                  4 = /dev/audio        Sun-compatible digital audio
 509                  6 =
 510                  7 = /dev/audioctl     SPARC audio control device
 511                  8 = /dev/sequencer2   Sequencer -- alternate device
 512                 16 = /dev/mixer1       Second soundcard mixer control
 513                 17 = /dev/patmgr0      Sequencer patch manager
 514                 18 = /dev/midi01       Second MIDI port
 515                 19 = /dev/dsp1         Second soundcard digital audio
 516                 20 = /dev/audio1       Second soundcard Sun digital audio
 517                 33 = /dev/patmgr1      Sequencer patch manager
 518                 34 = /dev/midi02       Third MIDI port
 519                 50 = /dev/midi03       Fourth MIDI port
 520
 521 14 block
 522
 523 15 char        Joystick
 524                  0 = /dev/js0          First analog joystick
 525                  1 = /dev/js1          Second analog joystick
 526                    ...
 527                128 = /dev/djs0         First digital joystick
 528                129 = /dev/djs1         Second digital joystick
 529                    ...
 530 15 block       Sony CDU-31A/CDU-33A CD-ROM
 531                  0 = /dev/sonycd       Sony CDU-31a CD-ROM
 532
 533 16 char        Non-SCSI scanners
 534                  0 = /dev/gs4500       Genius 4500 handheld scanner
 535
 536 16 block       GoldStar CD-ROM
 537                  0 = /dev/gscd         GoldStar CD-ROM
 538
 539 17 char        OBSOLETE (was Chase serial card)
 540                  0 = /dev/ttyH0        First Chase port
 541                  1 = /dev/ttyH1        Second Chase port
 542                    ...
 543 17 block       Optics Storage CD-ROM
 544                  0 = /dev/optcd        Optics Storage CD-ROM
 545
 546 18 char        OBSOLETE (was Chase serial card - alternate devices)
 547                  0 = /dev/cuh0         Callout device for ttyH0
 548                  1 = /dev/cuh1         Callout device for ttyH1
 549                    ...
 550 18 block       Sanyo CD-ROM
 551                  0 = /dev/sjcd         Sanyo CD-ROM
 552
 553 19 char        Cyclades serial card
 554                  0 = /dev/ttyC0        First Cyclades port
 555                    ...
 556                 31 = /dev/ttyC31       32nd Cyclades port
 557
 558 19 block       "Double" compressed disk
 559                  0 = /dev/double0      First compressed disk
 560                    ...
 561                  7 = /dev/double7      Eighth compressed disk
 562                128 = /dev/cdouble0     Mirror of first compressed disk
 563                    ...
 564                135 = /dev/cdouble7     Mirror of eighth compressed disk
 565
 566                See the Double documentation for the meaning of the
 567                mirror devices.
 568
 569 20 char        Cyclades serial card - alternate devices
 570                  0 = /dev/cub0         Callout device for ttyC0
 571                    ...
 572                 31 = /dev/cub31        Callout device for ttyC31
 573
 574 20 block       Hitachi CD-ROM (under development)
 575                  0 = /dev/hitcd        Hitachi CD-ROM
 576
 577 21 char        Generic SCSI access
 578                  0 = /dev/sg0          First generic SCSI device
 579                  1 = /dev/sg1          Second generic SCSI device
 580                    ...
 581
 582                Most distributions name these /dev/sga, /dev/sgb...;
 583                this sets an unnecessary limit of 26 SCSI devices in
 584                the system and is counter to standard Linux
 585                device-naming practice.
 586
 587 21 block       Acorn MFM hard drive interface
 588                  0 = /dev/mfma         First MFM drive whole disk
 589                 64 = /dev/mfmb         Second MFM drive whole disk
 590
 591                This device is used on the ARM-based Acorn RiscPC.
 592                Partitions are handled the same way as for IDE disks
 593                (see major number 3).
 594
 595 22 char        Digiboard serial card
 596                  0 = /dev/ttyD0        First Digiboard port
 597                  1 = /dev/ttyD1        Second Digiboard port
 598                    ...
 599 22 block       Second IDE hard disk/CD-ROM interface
 600                  0 = /dev/hdc          Master: whole disk (or CD-ROM)
 601                 64 = /dev/hdd          Slave: whole disk (or CD-ROM)
 602
 603                Partitions are handled the same way as for the first
 604                interface (see major number 3).
 605
 606 23 char        Digiboard serial card - alternate devices
 607                  0 = /dev/cud0         Callout device for ttyD0
 608                  1 = /dev/cud1         Callout device for ttyD1
 609                      ...
 610 23 block       Mitsumi proprietary CD-ROM
 611                  0 = /dev/mcd          Mitsumi CD-ROM
 612
 613 24 char        Stallion serial card
 614                  0 = /dev/ttyE0        Stallion port 0 card 0
 615                  1 = /dev/ttyE1        Stallion port 1 card 0
 616                    ...
 617                 64 = /dev/ttyE64       Stallion port 0 card 1
 618                 65 = /dev/ttyE65       Stallion port 1 card 1
 619                      ...
 620                128 = /dev/ttyE128      Stallion port 0 card 2
 621                129 = /dev/ttyE129      Stallion port 1 card 2
 622                    ...
 623                192 = /dev/ttyE192      Stallion port 0 card 3
 624                193 = /dev/ttyE193      Stallion port 1 card 3
 625                    ...
 626 24 block       Sony CDU-535 CD-ROM
 627                  0 = /dev/cdu535       Sony CDU-535 CD-ROM
 628
 629 25 char        Stallion serial card - alternate devices
 630                  0 = /dev/cue0         Callout device for ttyE0
 631                  1 = /dev/cue1         Callout device for ttyE1
 632                    ...
 633                 64 = /dev/cue64        Callout device for ttyE64
 634                 65 = /dev/cue65        Callout device for ttyE65
 635                    ...
 636                128 = /dev/cue128       Callout device for ttyE128
 637                129 = /dev/cue129       Callout device for ttyE129
 638                    ...
 639                192 = /dev/cue192       Callout device for ttyE192
 640                193 = /dev/cue193       Callout device for ttyE193
 641                      ...
 642 25 block       First Matsushita (Panasonic/SoundBlaster) CD-ROM
 643                  0 = /dev/sbpcd0       Panasonic CD-ROM controller 0 unit 0
 644                  1 = /dev/sbpcd1       Panasonic CD-ROM controller 0 unit 1
 645                  2 = /dev/sbpcd2       Panasonic CD-ROM controller 0 unit 2
 646                  3 = /dev/sbpcd3       Panasonic CD-ROM controller 0 unit 3
 647
 648 26 char
 649
 650 26 block       Second Matsushita (Panasonic/SoundBlaster) CD-ROM
 651                  0 = /dev/sbpcd4       Panasonic CD-ROM controller 1 unit 0
 652                  1 = /dev/sbpcd5       Panasonic CD-ROM controller 1 unit 1
 653                  2 = /dev/sbpcd6       Panasonic CD-ROM controller 1 unit 2
 654                  3 = /dev/sbpcd7       Panasonic CD-ROM controller 1 unit 3
 655
 656 27 char        QIC-117 tape
 657                  0 = /dev/qft0         Unit 0, rewind-on-close
 658                  1 = /dev/qft1         Unit 1, rewind-on-close
 659                  2 = /dev/qft2         Unit 2, rewind-on-close
 660                  3 = /dev/qft3         Unit 3, rewind-on-close
 661                  4 = /dev/nqft0        Unit 0, no rewind-on-close
 662                  5 = /dev/nqft1        Unit 1, no rewind-on-close
 663                  6 = /dev/nqft2        Unit 2, no rewind-on-close
 664                  7 = /dev/nqft3        Unit 3, no rewind-on-close
 665                 16 = /dev/zqft0        Unit 0, rewind-on-close, compression
 666                 17 = /dev/zqft1        Unit 1, rewind-on-close, compression
 667                 18 = /dev/zqft2        Unit 2, rewind-on-close, compression
 668                 19 = /dev/zqft3        Unit 3, rewind-on-close, compression
 669                 20 = /dev/nzqft0       Unit 0, no rewind-on-close, compression
 670                 21 = /dev/nzqft1       Unit 1, no rewind-on-close, compression
 671                 22 = /dev/nzqft2       Unit 2, no rewind-on-close, compression
 672                 23 = /dev/nzqft3       Unit 3, no rewind-on-close, compression
 673                 32 = /dev/rawqft0      Unit 0, rewind-on-close, no file marks
 674                 33 = /dev/rawqft1      Unit 1, rewind-on-close, no file marks
 675                 34 = /dev/rawqft2      Unit 2, rewind-on-close, no file marks
 676                 35 = /dev/rawqft3      Unit 3, rewind-on-close, no file marks
 677                 36 = /dev/nrawqft0     Unit 0, no rewind-on-close, no file marks
 678                 37 = /dev/nrawqft1     Unit 1, no rewind-on-close, no file marks
 679                 38 = /dev/nrawqft2     Unit 2, no rewind-on-close, no file marks
 680                 39 = /dev/nrawqft3     Unit 3, no rewind-on-close, no file marks
 681
 682 27 block       Third Matsushita (Panasonic/SoundBlaster) CD-ROM
 683                  0 = /dev/sbpcd8       Panasonic CD-ROM controller 2 unit 0
 684                  1 = /dev/sbpcd9       Panasonic CD-ROM controller 2 unit 1
 685                  2 = /dev/sbpcd10      Panasonic CD-ROM controller 2 unit 2
 686                  3 = /dev/sbpcd11      Panasonic CD-ROM controller 2 unit 3
 687
 688 28 char        Stallion serial card - card programming
 689                  0 = /dev/staliomem0   First Stallion card I/O memory
 690                  1 = /dev/staliomem1   Second Stallion card I/O memory
 691                  2 = /dev/staliomem2   Third Stallion card I/O memory
 692                  3 = /dev/staliomem3   Fourth Stallion card I/O memory
 693
 694 28 char        Atari SLM ACSI laser printer (68k/Atari)
 695                  0 = /dev/slm0         First SLM laser printer
 696                  1 = /dev/slm1         Second SLM laser printer
 697                    ...
 698 28 block       Fourth Matsushita (Panasonic/SoundBlaster) CD-ROM
 699                  0 = /dev/sbpcd12      Panasonic CD-ROM controller 3 unit 0
 700                  1 = /dev/sbpcd13      Panasonic CD-ROM controller 3 unit 1
 701                  2 = /dev/sbpcd14      Panasonic CD-ROM controller 3 unit 2
 702                  3 = /dev/sbpcd15      Panasonic CD-ROM controller 3 unit 3
 703
 704 28 block       ACSI disk (68k/Atari)
 705                  0 = /dev/ada          First ACSI disk whole disk
 706                 16 = /dev/adb          Second ACSI disk whole disk
 707                 32 = /dev/adc          Third ACSI disk whole disk
 708                    ...
 709                240 = /dev/adp          16th ACSI disk whole disk
 710
 711                Partitions are handled in the same way as for IDE
 712                disks (see major number 3) except that the limit on
 713                partitions is 15, like SCSI.
 714
 715 29 char        Universal frame buffer
 716                  0 = /dev/fb0          First frame buffer
 717                  1 = /dev/fb1          Second frame buffer
 718                    ...
 719                 31 = /dev/fb31         32nd frame buffer
 720
 721 29 block       Aztech/Orchid/Okano/Wearnes CD-ROM
 722                  0 = /dev/aztcd        Aztech CD-ROM
 723
 724 30 char        iBCS-2 compatibility devices
 725                  0 = /dev/socksys      Socket access
 726                  1 = /dev/spx          SVR3 local X interface
 727                 32 = /dev/inet/ip      Network access
 728                 33 = /dev/inet/icmp
 729                 34 = /dev/inet/ggp
 730                 35 = /dev/inet/ipip
 731                 36 = /dev/inet/tcp
 732                 37 = /dev/inet/egp
 733                 38 = /dev/inet/pup
 734                 39 = /dev/inet/udp
 735                 40 = /dev/inet/idp
 736                 41 = /dev/inet/rawip
 737
 738                Additionally, iBCS-2 requires the following links:
 739
 740                /dev/ip -> /dev/inet/ip
 741                /dev/icmp -> /dev/inet/icmp
 742                /dev/ggp -> /dev/inet/ggp
 743                /dev/ipip -> /dev/inet/ipip
 744                /dev/tcp -> /dev/inet/tcp
 745                /dev/egp -> /dev/inet/egp
 746                /dev/pup -> /dev/inet/pup
 747                /dev/udp -> /dev/inet/udp
 748                /dev/idp -> /dev/inet/idp
 749                /dev/rawip -> /dev/inet/rawip
 750                /dev/inet/arp -> /dev/inet/udp
 751                /dev/inet/rip -> /dev/inet/udp
 752                /dev/nfsd -> /dev/socksys
 753                /dev/X0R -> /dev/null (? apparently not required ?)
 754
 755 30 block       Philips LMS CM-205 CD-ROM
 756                  0 = /dev/cm205cd      Philips LMS CM-205 CD-ROM
 757
 758                /dev/lmscd is an older name for this device.  This
 759                driver does not work with the CM-205MS CD-ROM.
 760
 761 31 char        MPU-401 MIDI
 762                  0 = /dev/mpu401data   MPU-401 data port
 763                  1 = /dev/mpu401stat   MPU-401 status port
 764
 765 31 block       ROM/flash memory card
 766                  0 = /dev/rom0         First ROM card (rw)
 767                      ...
 768                  7 = /dev/rom7         Eighth ROM card (rw)
 769                  8 = /dev/rrom0        First ROM card (ro)
 770                    ...
 771                 15 = /dev/rrom7        Eighth ROM card (ro)
 772                 16 = /dev/flash0       First flash memory card (rw)
 773                    ...
 774                 23 = /dev/flash7       Eighth flash memory card (rw)
 775                 24 = /dev/rflash0      First flash memory card (ro)
 776                    ...
 777                 31 = /dev/rflash7      Eighth flash memory card (ro)
 778
 779                The read-write (rw) devices support back-caching
 780                written data in RAM, as well as writing to flash RAM
 781                devices.  The read-only devices (ro) support reading
 782                only.
 783
 784 32 char        Specialix serial card
 785                  0 = /dev/ttyX0        First Specialix port
 786                  1 = /dev/ttyX1        Second Specialix port
 787                    ...
 788 32 block       Philips LMS CM-206 CD-ROM
 789                  0 = /dev/cm206cd      Philips LMS CM-206 CD-ROM
 790
 791 33 char        Specialix serial card - alternate devices
 792                  0 = /dev/cux0         Callout device for ttyX0
 793                  1 = /dev/cux1         Callout device for ttyX1
 794                    ...
 795 33 block       Third IDE hard disk/CD-ROM interface
 796                  0 = /dev/hde          Master: whole disk (or CD-ROM)
 797                 64 = /dev/hdf          Slave: whole disk (or CD-ROM)
 798
 799                Partitions are handled the same way as for the first
 800                interface (see major number 3).
 801
 802 34 char        Z8530 HDLC driver
 803                  0 = /dev/scc0         First Z8530, first port
 804                  1 = /dev/scc1         First Z8530, second port
 805                  2 = /dev/scc2         Second Z8530, first port
 806                  3 = /dev/scc3         Second Z8530, second port
 807                    ...
 808
 809                In a previous version these devices were named
 810                /dev/sc1 for /dev/scc0, /dev/sc2 for /dev/scc1, and so
 811                on.
 812
 813 34 block       Fourth IDE hard disk/CD-ROM interface
 814                  0 = /dev/hdg          Master: whole disk (or CD-ROM)
 815                 64 = /dev/hdh          Slave: whole disk (or CD-ROM)
 816
 817                Partitions are handled the same way as for the first
 818                interface (see major number 3).
 819
 820 35 char        tclmidi MIDI driver
 821                  0 = /dev/midi0        First MIDI port, kernel timed
 822                  1 = /dev/midi1        Second MIDI port, kernel timed
 823                  2 = /dev/midi2        Third MIDI port, kernel timed
 824                  3 = /dev/midi3        Fourth MIDI port, kernel timed
 825                 64 = /dev/rmidi0       First MIDI port, untimed
 826                 65 = /dev/rmidi1       Second MIDI port, untimed
 827                 66 = /dev/rmidi2       Third MIDI port, untimed
 828                 67 = /dev/rmidi3       Fourth MIDI port, untimed
 829                128 = /dev/smpte0       First MIDI port, SMPTE timed
 830                129 = /dev/smpte1       Second MIDI port, SMPTE timed
 831                130 = /dev/smpte2       Third MIDI port, SMPTE timed
 832                131 = /dev/smpte3       Fourth MIDI port, SMPTE timed
 833
 834 35 block       Slow memory ramdisk
 835                  0 = /dev/slram        Slow memory ramdisk
 836
 837 36 char        Netlink support
 838                  0 = /dev/route        Routing, device updates, kernel to user
 839                  1 = /dev/skip         enSKIP security cache control
 840                  3 = /dev/fwmonitor    Firewall packet copies
 841                 16 = /dev/tap0         First Ethertap device
 842                    ...
 843                 31 = /dev/tap15        16th Ethertap device
 844
 845 36 block       OBSOLETE (was MCA ESDI hard disk)
 846
 847 37 char        IDE tape
 848                  0 = /dev/ht0          First IDE tape
 849                  1 = /dev/ht1          Second IDE tape
 850                    ...
 851                128 = /dev/nht0         First IDE tape, no rewind-on-close
 852                129 = /dev/nht1         Second IDE tape, no rewind-on-close
 853                    ...
 854
 855                Currently, only one IDE tape drive is supported.
 856
 857 37 block       Zorro II ramdisk
 858                  0 = /dev/z2ram        Zorro II ramdisk
 859
 860 38 char        Myricom PCI Myrinet board
 861                  0 = /dev/mlanai0      First Myrinet board
 862                  1 = /dev/mlanai1      Second Myrinet board
 863                    ...
 864
 865                This device is used for status query, board control
 866                and "user level packet I/O."  This board is also
 867                accessible as a standard networking "eth" device.
 868
 869 38 block       OBSOLETE (was Linux/AP+)
 870
 871 39 char        ML-16P experimental I/O board
 872                  0 = /dev/ml16pa-a0    First card, first analog channel
 873                  1 = /dev/ml16pa-a1    First card, second analog channel
 874                    ...
 875                 15 = /dev/ml16pa-a15   First card, 16th analog channel
 876                 16 = /dev/ml16pa-d     First card, digital lines
 877                 17 = /dev/ml16pa-c0    First card, first counter/timer
 878                 18 = /dev/ml16pa-c1    First card, second counter/timer
 879                 19 = /dev/ml16pa-c2    First card, third counter/timer
 880                 32 = /dev/ml16pb-a0    Second card, first analog channel
 881                 33 = /dev/ml16pb-a1    Second card, second analog channel
 882                    ...
 883                 47 = /dev/ml16pb-a15   Second card, 16th analog channel
 884                 48 = /dev/ml16pb-d     Second card, digital lines
 885                 49 = /dev/ml16pb-c0    Second card, first counter/timer
 886                 50 = /dev/ml16pb-c1    Second card, second counter/timer
 887                 51 = /dev/ml16pb-c2    Second card, third counter/timer
 888                      ...
 889 39 block
 890
 891 40 char
 892
 893 40 block
 894
 895 41 char        Yet Another Micro Monitor
 896                  0 = /dev/yamm         Yet Another Micro Monitor
 897
 898 41 block
 899
 900 42 char        Demo/sample use
 901
 902 42 block       Demo/sample use
 903
 904                This number is intended for use in sample code, as
 905                well as a general "example" device number.  It
 906                should never be used for a device driver that is being
 907                distributed; either obtain an official number or use
 908                the local/experimental range.  The sudden addition or
 909                removal of a driver with this number should not cause
 910                ill effects to the system (bugs excepted.)
 911
 912                IN PARTICULAR, ANY DISTRIBUTION WHICH CONTAINS A
 913                DEVICE DRIVER USING MAJOR NUMBER 42 IS NONCOMPLIANT.
 914
 915 43 char        isdn4linux virtual modem
 916                  0 = /dev/ttyI0        First virtual modem
 917                    ...
 918                 63 = /dev/ttyI63       64th virtual modem
 919
 920 43 block       Network block devices
 921                  0 = /dev/nb0          First network block device
 922                  1 = /dev/nb1          Second network block device
 923                    ...
 924
 925                Network Block Device is somehow similar to loopback
 926                devices: If you read from it, it sends packet across
 927                network asking server for data. If you write to it, it
 928                sends packet telling server to write. It could be used
 929                to mounting filesystems over the net, swapping over
 930                the net, implementing block device in userland etc.
 931
 932 44 char        isdn4linux virtual modem - alternate devices
 933                  0 = /dev/cui0         Callout device for ttyI0
 934                    ...
 935                 63 = /dev/cui63        Callout device for ttyI63
 936
 937 44 block       Flash Translation Layer (FTL) filesystems
 938                  0 = /dev/ftla         FTL on first Memory Technology Device
 939                 16 = /dev/ftlb         FTL on second Memory Technology Device
 940                 32 = /dev/ftlc         FTL on third Memory Technology Device
 941                    ...
 942                240 = /dev/ftlp         FTL on 16th Memory Technology Device
 943
 944                Partitions are handled in the same way as for IDE
 945                disks (see major number 3) except that the partition
 946                limit is 15 rather than 63 per disk (same as SCSI.)
 947
 948 45 char        isdn4linux ISDN BRI driver
 949                  0 = /dev/isdn0        First virtual B channel raw data
 950                    ...
 951                 63 = /dev/isdn63       64th virtual B channel raw data
 952                 64 = /dev/isdnctrl0    First channel control/debug
 953                    ...
 954                127 = /dev/isdnctrl63   64th channel control/debug
 955
 956                128 = /dev/ippp0        First SyncPPP device
 957                    ...
 958                191 = /dev/ippp63       64th SyncPPP device
 959
 960                255 = /dev/isdninfo     ISDN monitor interface
 961
 962 45 block       Parallel port IDE disk devices
 963                  0 = /dev/pda          First parallel port IDE disk
 964                 16 = /dev/pdb          Second parallel port IDE disk
 965                 32 = /dev/pdc          Third parallel port IDE disk
 966                 48 = /dev/pdd          Fourth parallel port IDE disk
 967
 968                Partitions are handled in the same way as for IDE
 969                disks (see major number 3) except that the partition
 970                limit is 15 rather than 63 per disk.
 971
 972 46 char        Comtrol Rocketport serial card
 973                  0 = /dev/ttyR0        First Rocketport port
 974                  1 = /dev/ttyR1        Second Rocketport port
 975                    ...
 976 46 block       Parallel port ATAPI CD-ROM devices
 977                  0 = /dev/pcd0         First parallel port ATAPI CD-ROM
 978                  1 = /dev/pcd1         Second parallel port ATAPI CD-ROM
 979                  2 = /dev/pcd2         Third parallel port ATAPI CD-ROM
 980                  3 = /dev/pcd3         Fourth parallel port ATAPI CD-ROM
 981
 982 47 char        Comtrol Rocketport serial card - alternate devices
 983                  0 = /dev/cur0         Callout device for ttyR0
 984                  1 = /dev/cur1         Callout device for ttyR1
 985                    ...
 986 47 block       Parallel port ATAPI disk devices
 987                  0 = /dev/pf0          First parallel port ATAPI disk
 988                  1 = /dev/pf1          Second parallel port ATAPI disk
 989                  2 = /dev/pf2          Third parallel port ATAPI disk
 990                  3 = /dev/pf3          Fourth parallel port ATAPI disk
 991
 992                This driver is intended for floppy disks and similar
 993                devices and hence does not support partitioning.
 994
 995 48 char        SDL RISCom serial card
 996                  0 = /dev/ttyL0        First RISCom port
 997                  1 = /dev/ttyL1        Second RISCom port
 998                    ...
 999 48 block       Mylex DAC960 PCI RAID controller; first controller
1000                  0 = /dev/rd/c0d0      First disk, whole disk
1001                  8 = /dev/rd/c0d1      Second disk, whole disk
1002                    ...
1003                248 = /dev/rd/c0d31     32nd disk, whole disk
1004
1005                For partitions add:
1006                  0 = /dev/rd/c?d?      Whole disk
1007                  1 = /dev/rd/c?d?p1    First partition
1008                    ...
1009                  7 = /dev/rd/c?d?p7    Seventh partition
1010
1011 49 char        SDL RISCom serial card - alternate devices
1012                  0 = /dev/cul0         Callout device for ttyL0
1013                  1 = /dev/cul1         Callout device for ttyL1
1014                    ...
1015 49 block       Mylex DAC960 PCI RAID controller; second controller
1016                  0 = /dev/rd/c1d0      First disk, whole disk
1017                  8 = /dev/rd/c1d1      Second disk, whole disk
1018                    ...
1019                248 = /dev/rd/c1d31     32nd disk, whole disk
1020
1021                Partitions are handled as for major 48.
1022
1023 50 char        Reserved for GLINT
1024
1025 50 block       Mylex DAC960 PCI RAID controller; third controller
1026                  0 = /dev/rd/c2d0      First disk, whole disk
1027                  8 = /dev/rd/c2d1      Second disk, whole disk
1028                    ...
1029                248 = /dev/rd/c2d31     32nd disk, whole disk
1030
1031 51 char        Baycom radio modem OR Radio Tech BIM-XXX-RS232 radio modem
1032                  0 = /dev/bc0          First Baycom radio modem
1033                  1 = /dev/bc1          Second Baycom radio modem
1034                    ...
1035 51 block       Mylex DAC960 PCI RAID controller; fourth controller
1036                  0 = /dev/rd/c3d0      First disk, whole disk
1037                  8 = /dev/rd/c3d1      Second disk, whole disk
1038                    ...
1039                248 = /dev/rd/c3d31     32nd disk, whole disk
1040
1041                Partitions are handled as for major 48.
1042
1043 52 char        Spellcaster DataComm/BRI ISDN card
1044                  0 = /dev/dcbri0       First DataComm card
1045                  1 = /dev/dcbri1       Second DataComm card
1046                  2 = /dev/dcbri2       Third DataComm card
1047                  3 = /dev/dcbri3       Fourth DataComm card
1048
1049 52 block       Mylex DAC960 PCI RAID controller; fifth controller
1050                  0 = /dev/rd/c4d0      First disk, whole disk
1051                  8 = /dev/rd/c4d1      Second disk, whole disk
1052                    ...
1053                248 = /dev/rd/c4d31     32nd disk, whole disk
1054
1055                Partitions are handled as for major 48.
1056
1057 53 char        BDM interface for remote debugging MC683xx microcontrollers
1058                  0 = /dev/pd_bdm0      PD BDM interface on lp0
1059                  1 = /dev/pd_bdm1      PD BDM interface on lp1
1060                  2 = /dev/pd_bdm2      PD BDM interface on lp2
1061                  4 = /dev/icd_bdm0     ICD BDM interface on lp0
1062                  5 = /dev/icd_bdm1     ICD BDM interface on lp1
1063                  6 = /dev/icd_bdm2     ICD BDM interface on lp2
1064
1065                This device is used for the interfacing to the MC683xx
1066                microcontrollers via Background Debug Mode by use of a
1067                Parallel Port interface. PD is the Motorola Public
1068                Domain Interface and ICD is the commercial interface
1069                by P&E.
1070
1071 53 block       Mylex DAC960 PCI RAID controller; sixth controller
1072                  0 = /dev/rd/c5d0      First disk, whole disk
1073                  8 = /dev/rd/c5d1      Second disk, whole disk
1074                    ...
1075                248 = /dev/rd/c5d31     32nd disk, whole disk
1076
1077                Partitions are handled as for major 48.
1078
1079 54 char        Electrocardiognosis Holter serial card
1080                  0 = /dev/holter0      First Holter port
1081                  1 = /dev/holter1      Second Holter port
1082                  2 = /dev/holter2      Third Holter port
1083
1084                A custom serial card used by Electrocardiognosis SRL
1085                <mseritan@ottonel.pub.ro> to transfer data from Holter
1086                24-hour heart monitoring equipment.
1087
1088 54 block       Mylex DAC960 PCI RAID controller; seventh controller
1089                  0 = /dev/rd/c6d0      First disk, whole disk
1090                  8 = /dev/rd/c6d1      Second disk, whole disk
1091                    ...
1092                248 = /dev/rd/c6d31     32nd disk, whole disk
1093
1094                Partitions are handled as for major 48.
1095
1096 55 char        DSP56001 digital signal processor
1097                  0 = /dev/dsp56k       First DSP56001
1098
1099 55 block       Mylex DAC960 PCI RAID controller; eighth controller
1100                  0 = /dev/rd/c7d0      First disk, whole disk
1101                  8 = /dev/rd/c7d1      Second disk, whole disk
1102                    ...
1103                248 = /dev/rd/c7d31     32nd disk, whole disk
1104
1105                Partitions are handled as for major 48.
1106
1107 56 char        Apple Desktop Bus
1108                  0 = /dev/adb          ADB bus control
1109
1110                Additional devices will be added to this number, all
1111                starting with /dev/adb.
1112
1113 56 block       Fifth IDE hard disk/CD-ROM interface
1114                  0 = /dev/hdi          Master: whole disk (or CD-ROM)
1115                 64 = /dev/hdj          Slave: whole disk (or CD-ROM)
1116
1117                Partitions are handled the same way as for the first
1118                interface (see major number 3).
1119
1120 57 char        Hayes ESP serial card
1121                  0 = /dev/ttyP0        First ESP port
1122                  1 = /dev/ttyP1        Second ESP port
1123                    ...
1124
1125 57 block       Sixth IDE hard disk/CD-ROM interface
1126                  0 = /dev/hdk          Master: whole disk (or CD-ROM)
1127                 64 = /dev/hdl          Slave: whole disk (or CD-ROM)
1128
1129                Partitions are handled the same way as for the first
1130                interface (see major number 3).
1131
1132 58 char        Hayes ESP serial card - alternate devices
1133                  0 = /dev/cup0         Callout device for ttyP0
1134                  1 = /dev/cup1         Callout device for ttyP1
1135                    ...
1136
1137 58 block       Reserved for logical volume manager
1138
1139 59 char        sf firewall package
1140                  0 = /dev/firewall     Communication with sf kernel module
1141
1142 59 block       Generic PDA filesystem device
1143                  0 = /dev/pda0         First PDA device
1144                  1 = /dev/pda1         Second PDA device
1145                    ...
1146
1147                The pda devices are used to mount filesystems on
1148                remote pda's (basically slow handheld machines with
1149                proprietary OS's and limited memory and storage
1150                running small fs translation drivers) through serial /
1151                IRDA / parallel links.
1152
1153                NAMING CONFLICT -- PROPOSED REVISED NAME /dev/rpda0 etc
1154
1155 60-63 char     LOCAL/EXPERIMENTAL USE
1156
1157 60-63 block    LOCAL/EXPERIMENTAL USE
1158                Allocated for local/experimental use.  For devices not
1159                assigned official numbers, these ranges should be
1160                used in order to avoid conflicting with future assignments.
1161
1162 64 char        ENskip kernel encryption package
1163                  0 = /dev/enskip       Communication with ENskip kernel module
1164
1165 64 block       Scramdisk/DriveCrypt encrypted devices
1166                  0 = /dev/scramdisk/master    Master node for ioctls
1167                  1 = /dev/scramdisk/1         First encrypted device
1168                  2 = /dev/scramdisk/2         Second encrypted device
1169                  ...
1170                255 = /dev/scramdisk/255       255th encrypted device
1171
1172                The filename of the encrypted container and the passwords
1173                are sent via ioctls (using the sdmount tool) to the master
1174                node which then activates them via one of the
1175                /dev/scramdisk/x nodes for loop mounting (all handled
1176                through the sdmount tool).
1177
1178                Requested by: andy@scramdisklinux.org
1179
1180 65 char        Sundance "plink" Transputer boards (obsolete, unused)
1181                  0 = /dev/plink0       First plink device
1182                  1 = /dev/plink1       Second plink device
1183                  2 = /dev/plink2       Third plink device
1184                  3 = /dev/plink3       Fourth plink device
1185                 64 = /dev/rplink0      First plink device, raw
1186                 65 = /dev/rplink1      Second plink device, raw
1187                 66 = /dev/rplink2      Third plink device, raw
1188                 67 = /dev/rplink3      Fourth plink device, raw
1189                128 = /dev/plink0d      First plink device, debug
1190                129 = /dev/plink1d      Second plink device, debug
1191                130 = /dev/plink2d      Third plink device, debug
1192                131 = /dev/plink3d      Fourth plink device, debug
1193                192 = /dev/rplink0d     First plink device, raw, debug
1194                193 = /dev/rplink1d     Second plink device, raw, debug
1195                194 = /dev/rplink2d     Third plink device, raw, debug
1196                195 = /dev/rplink3d     Fourth plink device, raw, debug
1197
1198                This is a commercial driver; contact James Howes
1199                <jth@prosig.demon.co.uk> for information.
1200
1201 65 block       SCSI disk devices (16-31)
1202                  0 = /dev/sdq          17th SCSI disk whole disk
1203                 16 = /dev/sdr          18th SCSI disk whole disk
1204                 32 = /dev/sds          19th SCSI disk whole disk
1205                    ...
1206                240 = /dev/sdaf         32nd SCSI disk whole disk
1207
1208                Partitions are handled in the same way as for IDE
1209                disks (see major number 3) except that the limit on
1210                partitions is 15.
1211
1212 66 char        YARC PowerPC PCI coprocessor card
1213                  0 = /dev/yppcpci0     First YARC card
1214                  1 = /dev/yppcpci1     Second YARC card
1215                    ...
1216
1217 66 block       SCSI disk devices (32-47)
1218                  0 = /dev/sdag         33th SCSI disk whole disk
1219                 16 = /dev/sdah         34th SCSI disk whole disk
1220                 32 = /dev/sdai         35th SCSI disk whole disk
1221                    ...
1222                240 = /dev/sdav         48nd SCSI disk whole disk
1223
1224                Partitions are handled in the same way as for IDE
1225                disks (see major number 3) except that the limit on
1226                partitions is 15.
1227
1228 67 char        Coda network file system
1229                  0 = /dev/cfs0         Coda cache manager
1230
1231                See http://www.coda.cs.cmu.edu for information about Coda.
1232
1233 67 block       SCSI disk devices (48-63)
1234                  0 = /dev/sdaw         49th SCSI disk whole disk
1235                 16 = /dev/sdax         50th SCSI disk whole disk
1236                 32 = /dev/sday         51st SCSI disk whole disk
1237                    ...
1238                240 = /dev/sdbl         64th SCSI disk whole disk
1239
1240                Partitions are handled in the same way as for IDE
1241                disks (see major number 3) except that the limit on
1242                partitions is 15.
1243
1244 68 char        CAPI 2.0 interface
1245                  0 = /dev/capi20       Control device
1246                  1 = /dev/capi20.00    First CAPI 2.0 application
1247                  2 = /dev/capi20.01    Second CAPI 2.0 application
1248                    ...
1249                 20 = /dev/capi20.19    19th CAPI 2.0 application
1250
1251                ISDN CAPI 2.0 driver for use with CAPI 2.0
1252                applications; currently supports the AVM B1 card.
1253
1254 68 block       SCSI disk devices (64-79)
1255                  0 = /dev/sdbm         65th SCSI disk whole disk
1256                 16 = /dev/sdbn         66th SCSI disk whole disk
1257                 32 = /dev/sdbo         67th SCSI disk whole disk
1258                    ...
1259                240 = /dev/sdcb         80th SCSI disk whole disk
1260
1261                Partitions are handled in the same way as for IDE
1262                disks (see major number 3) except that the limit on
1263                partitions is 15.
1264
1265 69 char        MA16 numeric accelerator card
1266                  0 = /dev/ma16         Board memory access
1267
1268 69 block       SCSI disk devices (80-95)
1269                  0 = /dev/sdcc         81st SCSI disk whole disk
1270                 16 = /dev/sdcd         82nd SCSI disk whole disk
1271                 32 = /dev/sdce         83th SCSI disk whole disk
1272                    ...
1273                240 = /dev/sdcr         96th SCSI disk whole disk
1274
1275                Partitions are handled in the same way as for IDE
1276                disks (see major number 3) except that the limit on
1277                partitions is 15.
1278
1279 70 char        SpellCaster Protocol Services Interface
1280                  0 = /dev/apscfg       Configuration interface
1281                  1 = /dev/apsauth      Authentication interface
1282                  2 = /dev/apslog       Logging interface
1283                  3 = /dev/apsdbg       Debugging interface
1284                 64 = /dev/apsisdn      ISDN command interface
1285                 65 = /dev/apsasync     Async command interface
1286                128 = /dev/apsmon       Monitor interface
1287
1288 70 block       SCSI disk devices (96-111)
1289                  0 = /dev/sdcs         97th SCSI disk whole disk
1290                 16 = /dev/sdct         98th SCSI disk whole disk
1291                 32 = /dev/sdcu         99th SCSI disk whole disk
1292                    ...
1293                240 = /dev/sddh         112nd SCSI disk whole disk
1294
1295                Partitions are handled in the same way as for IDE
1296                disks (see major number 3) except that the limit on
1297                partitions is 15.
1298
1299 71 char        Computone IntelliPort II serial card
1300                  0 = /dev/ttyF0        IntelliPort II board 0, port 0
1301                  1 = /dev/ttyF1        IntelliPort II board 0, port 1
1302                    ...
1303                 63 = /dev/ttyF63       IntelliPort II board 0, port 63
1304                 64 = /dev/ttyF64       IntelliPort II board 1, port 0
1305                 65 = /dev/ttyF65       IntelliPort II board 1, port 1
1306                    ...
1307                127 = /dev/ttyF127      IntelliPort II board 1, port 63
1308                128 = /dev/ttyF128      IntelliPort II board 2, port 0
1309                129 = /dev/ttyF129      IntelliPort II board 2, port 1
1310                    ...
1311                191 = /dev/ttyF191      IntelliPort II board 2, port 63
1312                192 = /dev/ttyF192      IntelliPort II board 3, port 0
1313                193 = /dev/ttyF193      IntelliPort II board 3, port 1
1314                    ...
1315                255 = /dev/ttyF255      IntelliPort II board 3, port 63
1316
1317 71 block       SCSI disk devices (112-127)
1318                  0 = /dev/sddi         113th SCSI disk whole disk
1319                 16 = /dev/sddj         114th SCSI disk whole disk
1320                 32 = /dev/sddk         115th SCSI disk whole disk
1321                    ...
1322                240 = /dev/sddx         128th SCSI disk whole disk
1323
1324                Partitions are handled in the same way as for IDE
1325                disks (see major number 3) except that the limit on
1326                partitions is 15.
1327
1328 72 char        Computone IntelliPort II serial card - alternate devices
1329                  0 = /dev/cuf0         Callout device for ttyF0
1330                  1 = /dev/cuf1         Callout device for ttyF1
1331                    ...
1332                 63 = /dev/cuf63        Callout device for ttyF63
1333                 64 = /dev/cuf64        Callout device for ttyF64
1334                 65 = /dev/cuf65        Callout device for ttyF65
1335                    ...
1336                127 = /dev/cuf127       Callout device for ttyF127
1337                128 = /dev/cuf128       Callout device for ttyF128
1338                129 = /dev/cuf129       Callout device for ttyF129
1339                    ...
1340                191 = /dev/cuf191       Callout device for ttyF191
1341                192 = /dev/cuf192       Callout device for ttyF192
1342                193 = /dev/cuf193       Callout device for ttyF193
1343                    ...
1344                255 = /dev/cuf255       Callout device for ttyF255
1345
1346 72 block       Compaq Intelligent Drive Array, first controller
1347                  0 = /dev/ida/c0d0     First logical drive whole disk
1348                 16 = /dev/ida/c0d1     Second logical drive whole disk
1349                    ...
1350                240 = /dev/ida/c0d15    16th logical drive whole disk
1351
1352                Partitions are handled the same way as for Mylex
1353                DAC960 (see major number 48) except that the limit on
1354                partitions is 15.
1355
1356 73 char        Computone IntelliPort II serial card - control devices
1357                  0 = /dev/ip2ipl0      Loadware device for board 0
1358                  1 = /dev/ip2stat0     Status device for board 0
1359                  4 = /dev/ip2ipl1      Loadware device for board 1
1360                  5 = /dev/ip2stat1     Status device for board 1
1361                  8 = /dev/ip2ipl2      Loadware device for board 2
1362                  9 = /dev/ip2stat2     Status device for board 2
1363                 12 = /dev/ip2ipl3      Loadware device for board 3
1364                 13 = /dev/ip2stat3     Status device for board 3
1365
1366 73 block       Compaq Intelligent Drive Array, second controller
1367                  0 = /dev/ida/c1d0     First logical drive whole disk
1368                 16 = /dev/ida/c1d1     Second logical drive whole disk
1369                    ...
1370                240 = /dev/ida/c1d15    16th logical drive whole disk
1371
1372                Partitions are handled the same way as for Mylex
1373                DAC960 (see major number 48) except that the limit on
1374                partitions is 15.
1375
1376 74 char        SCI bridge
1377                  0 = /dev/SCI/0        SCI device 0
1378                  1 = /dev/SCI/1        SCI device 1
1379                    ...
1380
1381                Currently for Dolphin Interconnect Solutions' PCI-SCI
1382                bridge.
1383
1384 74 block       Compaq Intelligent Drive Array, third controller
1385                  0 = /dev/ida/c2d0     First logical drive whole disk
1386                 16 = /dev/ida/c2d1     Second logical drive whole disk
1387                    ...
1388                240 = /dev/ida/c2d15    16th logical drive whole disk
1389
1390                Partitions are handled the same way as for Mylex
1391                DAC960 (see major number 48) except that the limit on
1392                partitions is 15.
1393
1394 75 char        Specialix IO8+ serial card
1395                  0 = /dev/ttyW0        First IO8+ port, first card
1396                  1 = /dev/ttyW1        Second IO8+ port, first card
1397                    ...
1398                  8 = /dev/ttyW8        First IO8+ port, second card
1399                    ...
1400
1401 75 block       Compaq Intelligent Drive Array, fourth controller
1402                  0 = /dev/ida/c3d0     First logical drive whole disk
1403                 16 = /dev/ida/c3d1     Second logical drive whole disk
1404                    ...
1405                240 = /dev/ida/c3d15    16th logical drive whole disk
1406
1407                Partitions are handled the same way as for Mylex
1408                DAC960 (see major number 48) except that the limit on
1409                partitions is 15.
1410
1411 76 char        Specialix IO8+ serial card - alternate devices
1412                  0 = /dev/cuw0         Callout device for ttyW0
1413                  1 = /dev/cuw1         Callout device for ttyW1
1414                    ...
1415                  8 = /dev/cuw8         Callout device for ttyW8
1416                    ...
1417
1418 76 block       Compaq Intelligent Drive Array, fifth controller
1419                  0 = /dev/ida/c4d0     First logical drive whole disk
1420                 16 = /dev/ida/c4d1     Second logical drive whole disk
1421                    ...
1422                240 = /dev/ida/c4d15    16th logical drive whole disk
1423
1424                Partitions are handled the same way as for Mylex
1425                DAC960 (see major number 48) except that the limit on
1426                partitions is 15.
1427
1428
1429 77 char        ComScire Quantum Noise Generator
1430                  0 = /dev/qng          ComScire Quantum Noise Generator
1431
1432 77 block       Compaq Intelligent Drive Array, sixth controller
1433                  0 = /dev/ida/c5d0     First logical drive whole disk
1434                 16 = /dev/ida/c5d1     Second logical drive whole disk
1435                    ...
1436                240 = /dev/ida/c5d15    16th logical drive whole disk
1437
1438                Partitions are handled the same way as for Mylex
1439                DAC960 (see major number 48) except that the limit on
1440                partitions is 15.
1441
1442 78 char        PAM Software's multimodem boards
1443                  0 = /dev/ttyM0        First PAM modem
1444                  1 = /dev/ttyM1        Second PAM modem
1445                    ...
1446
1447 78 block       Compaq Intelligent Drive Array, seventh controller
1448                  0 = /dev/ida/c6d0     First logical drive whole disk
1449                 16 = /dev/ida/c6d1     Second logical drive whole disk
1450                    ...
1451                240 = /dev/ida/c6d15    16th logical drive whole disk
1452
1453                Partitions are handled the same way as for Mylex
1454                DAC960 (see major number 48) except that the limit on
1455                partitions is 15.
1456
1457 79 char        PAM Software's multimodem boards - alternate devices
1458                  0 = /dev/cum0         Callout device for ttyM0
1459                  1 = /dev/cum1         Callout device for ttyM1
1460                    ...
1461
1462 79 block       Compaq Intelligent Drive Array, eighth controller
1463                  0 = /dev/ida/c7d0     First logical drive whole disk
1464                 16 = /dev/ida/c7d1     Second logical drive whole disk
1465                    ...
1466                240 = /dev/ida/c715     16th logical drive whole disk
1467
1468                Partitions are handled the same way as for Mylex
1469                DAC960 (see major number 48) except that the limit on
1470                partitions is 15.
1471
1472 80 char        Photometrics AT200 CCD camera
1473                  0 = /dev/at200        Photometrics AT200 CCD camera
1474
1475 80 block       I2O hard disk
1476                  0 = /dev/i2o/hda      First I2O hard disk, whole disk
1477                 16 = /dev/i2o/hdb      Second I2O hard disk, whole disk
1478                    ...
1479                240 = /dev/i2o/hdp      16th I2O hard disk, whole disk
1480
1481                Partitions are handled in the same way as for IDE
1482                disks (see major number 3) except that the limit on
1483                partitions is 15.
1484
1485 81 char        video4linux
1486                  0 = /dev/video0       Video capture/overlay device
1487                    ...
1488                 63 = /dev/video63      Video capture/overlay device
1489                 64 = /dev/radio0       Radio device
1490                    ...
1491                127 = /dev/radio63      Radio device
1492                224 = /dev/vbi0         Vertical blank interrupt
1493                    ...
1494                255 = /dev/vbi31        Vertical blank interrupt
1495
1496 81 block       I2O hard disk
1497                  0 = /dev/i2o/hdq      17th I2O hard disk, whole disk
1498                 16 = /dev/i2o/hdr      18th I2O hard disk, whole disk
1499                    ...
1500                240 = /dev/i2o/hdaf     32nd I2O hard disk, whole disk
1501
1502                Partitions are handled in the same way as for IDE
1503                disks (see major number 3) except that the limit on
1504                partitions is 15.
1505
1506 82 char        WiNRADiO communications receiver card
1507                  0 = /dev/winradio0    First WiNRADiO card
1508                  1 = /dev/winradio1    Second WiNRADiO card
1509                    ...
1510
1511                The driver and documentation may be obtained from
1512                http://www.winradio.com/
1513
1514 82 block       I2O hard disk
1515                  0 = /dev/i2o/hdag     33rd I2O hard disk, whole disk
1516                 16 = /dev/i2o/hdah     34th I2O hard disk, whole disk
1517                    ...
1518                240 = /dev/i2o/hdav     48th I2O hard disk, whole disk
1519
1520                Partitions are handled in the same way as for IDE
1521                disks (see major number 3) except that the limit on
1522                partitions is 15.
1523
1524 83 char        Matrox mga_vid video driver
1525                 0 = /dev/mga_vid0      1st video card
1526                 1 = /dev/mga_vid1      2nd video card
1527                 2 = /dev/mga_vid2      3rd video card
1528                  ...
1529                15 = /dev/mga_vid15     16th video card
1530
1531 83 block       I2O hard disk
1532                  0 = /dev/i2o/hdaw     49th I2O hard disk, whole disk
1533                 16 = /dev/i2o/hdax     50th I2O hard disk, whole disk
1534                    ...
1535                240 = /dev/i2o/hdbl     64th I2O hard disk, whole disk
1536
1537                Partitions are handled in the same way as for IDE
1538                disks (see major number 3) except that the limit on
1539                partitions is 15.
1540
1541 84 char        Ikon 1011[57] Versatec Greensheet Interface
1542                  0 = /dev/ihcp0        First Greensheet port
1543                  1 = /dev/ihcp1        Second Greensheet port
1544
1545 84 block       I2O hard disk
1546                  0 = /dev/i2o/hdbm     65th I2O hard disk, whole disk
1547                 16 = /dev/i2o/hdbn     66th I2O hard disk, whole disk
1548                    ...
1549                240 = /dev/i2o/hdcb     80th I2O hard disk, whole disk
1550
1551                Partitions are handled in the same way as for IDE
1552                disks (see major number 3) except that the limit on
1553                partitions is 15.
1554
1555 85 char        Linux/SGI shared memory input queue
1556                  0 = /dev/shmiq        Master shared input queue
1557                  1 = /dev/qcntl0       First device pushed
1558                  2 = /dev/qcntl1       Second device pushed
1559                    ...
1560
1561 85 block       I2O hard disk
1562                  0 = /dev/i2o/hdcc     81st I2O hard disk, whole disk
1563                 16 = /dev/i2o/hdcd     82nd I2O hard disk, whole disk
1564                    ...
1565                240 = /dev/i2o/hdcr     96th I2O hard disk, whole disk
1566
1567                Partitions are handled in the same way as for IDE
1568                disks (see major number 3) except that the limit on
1569                partitions is 15.
1570
1571 86 char        SCSI media changer
1572                  0 = /dev/sch0         First SCSI media changer
1573                  1 = /dev/sch1         Second SCSI media changer
1574                    ...
1575
1576 86 block       I2O hard disk
1577                  0 = /dev/i2o/hdcs     97th I2O hard disk, whole disk
1578                 16 = /dev/i2o/hdct     98th I2O hard disk, whole disk
1579                    ...
1580                240 = /dev/i2o/hddh     112th I2O hard disk, whole disk
1581
1582                Partitions are handled in the same way as for IDE
1583                disks (see major number 3) except that the limit on
1584                partitions is 15.
1585
1586 87 char        Sony Control-A1 stereo control bus
1587                  0 = /dev/controla0    First device on chain
1588                  1 = /dev/controla1    Second device on chain
1589                    ...
1590
1591 87 block       I2O hard disk
1592                  0 = /dev/i2o/hddi     113rd I2O hard disk, whole disk
1593                 16 = /dev/i2o/hddj     114th I2O hard disk, whole disk
1594                    ...
1595                240 = /dev/i2o/hddx     128th I2O hard disk, whole disk
1596
1597                Partitions are handled in the same way as for IDE
1598                disks (see major number 3) except that the limit on
1599                partitions is 15.
1600
1601 88 char        COMX synchronous serial card
1602                  0 = /dev/comx0        COMX channel 0
1603                  1 = /dev/comx1        COMX channel 1
1604                    ...
1605
1606 88 block       Seventh IDE hard disk/CD-ROM interface
1607                  0 = /dev/hdm          Master: whole disk (or CD-ROM)
1608                 64 = /dev/hdn          Slave: whole disk (or CD-ROM)
1609
1610                Partitions are handled the same way as for the first
1611                interface (see major number 3).
1612
1613 89 char        I2C bus interface
1614                  0 = /dev/i2c-0        First I2C adapter
1615                  1 = /dev/i2c-1        Second I2C adapter
1616                    ...
1617
1618 89 block       Eighth IDE hard disk/CD-ROM interface
1619                  0 = /dev/hdo          Master: whole disk (or CD-ROM)
1620                 64 = /dev/hdp          Slave: whole disk (or CD-ROM)
1621
1622                Partitions are handled the same way as for the first
1623                interface (see major number 3).
1624
1625 90 char        Memory Technology Device (RAM, ROM, Flash)
1626                  0 = /dev/mtd0         First MTD (rw)
1627                  1 = /dev/mtdr0        First MTD (ro)
1628                    ...
1629                 30 = /dev/mtd15        16th MTD (rw)
1630                 31 = /dev/mtdr15       16th MTD (ro)
1631
1632 90 block       Ninth IDE hard disk/CD-ROM interface
1633                  0 = /dev/hdq          Master: whole disk (or CD-ROM)
1634                 64 = /dev/hdr          Slave: whole disk (or CD-ROM)
1635
1636                Partitions are handled the same way as for the first
1637                interface (see major number 3).
1638
1639 91 char        CAN-Bus devices
1640                  0 = /dev/can0         First CAN-Bus controller
1641                  1 = /dev/can1         Second CAN-Bus controller
1642                    ...
1643
1644 91 block       Tenth IDE hard disk/CD-ROM interface
1645                  0 = /dev/hds          Master: whole disk (or CD-ROM)
1646                 64 = /dev/hdt          Slave: whole disk (or CD-ROM)
1647
1648                Partitions are handled the same way as for the first
1649                interface (see major number 3).
1650
1651 92 char        Reserved for ith Kommunikationstechnik MIC ISDN card
1652
1653 92 block       PPDD encrypted disk driver
1654                  0 = /dev/ppdd0        First encrypted disk
1655                  1 = /dev/ppdd1        Second encrypted disk
1656                    ...
1657
1658                Partitions are handled in the same way as for IDE
1659                disks (see major number 3) except that the limit on
1660                partitions is 15.
1661
1662 93 char
1663
1664 93 block       NAND Flash Translation Layer filesystem
1665                  0 = /dev/nftla        First NFTL layer
1666                 16 = /dev/nftlb        Second NFTL layer
1667                    ...
1668                240 = /dev/nftlp        16th NTFL layer
1669
1670 94 char
1671
1672 94 block       IBM S/390 DASD block storage
1673                  0 = /dev/dasda First DASD device, major
1674                  1 = /dev/dasda1 First DASD device, block 1
1675                  2 = /dev/dasda2 First DASD device, block 2
1676                  3 = /dev/dasda3 First DASD device, block 3
1677                  4 = /dev/dasdb Second DASD device, major
1678                  5 = /dev/dasdb1 Second DASD device, block 1
1679                  6 = /dev/dasdb2 Second DASD device, block 2
1680                  7 = /dev/dasdb3 Second DASD device, block 3
1681                    ...
1682
1683 95 char        IP filter
1684                  0 = /dev/ipl          Filter control device/log file
1685                  1 = /dev/ipnat        NAT control device/log file
1686                  2 = /dev/ipstate      State information log file
1687                  3 = /dev/ipauth       Authentication control device/log file
1688                    ...
1689
1690 96 char        Parallel port ATAPI tape devices
1691                  0 = /dev/pt0          First parallel port ATAPI tape
1692                  1 = /dev/pt1          Second parallel port ATAPI tape
1693                    ...
1694                128 = /dev/npt0         First p.p. ATAPI tape, no rewind
1695                129 = /dev/npt1         Second p.p. ATAPI tape, no rewind
1696                    ...
1697
1698 96 block       Inverse NAND Flash Translation Layer
1699                  0 = /dev/inftla First INFTL layer
1700                 16 = /dev/inftlb Second INFTL layer
1701                    ...
1702                240 = /dev/inftlp       16th INTFL layer
1703
1704 97 char        Parallel port generic ATAPI interface
1705                  0 = /dev/pg0          First parallel port ATAPI device
1706                  1 = /dev/pg1          Second parallel port ATAPI device
1707                  2 = /dev/pg2          Third parallel port ATAPI device
1708                  3 = /dev/pg3          Fourth parallel port ATAPI device
1709
1710                These devices support the same API as the generic SCSI
1711                devices.
1712
1713 98 char        Control and Measurement Device (comedi)
1714                  0 = /dev/comedi0      First comedi device
1715                  1 = /dev/comedi1      Second comedi device
1716                    ...
1717
1718                See http://stm.lbl.gov/comedi.
1719
1720 98 block       User-mode virtual block device
1721                  0 = /dev/ubda         First user-mode block device
1722                 16 = /dev/udbb         Second user-mode block device
1723                    ...
1724
1725                Partitions are handled in the same way as for IDE
1726                disks (see major number 3) except that the limit on
1727                partitions is 15.
1728
1729                This device is used by the user-mode virtual kernel port.
1730
1731 99 char        Raw parallel ports
1732                  0 = /dev/parport0     First parallel port
1733                  1 = /dev/parport1     Second parallel port
1734                    ...
1735
1736 99 block       JavaStation flash disk
1737                  0 = /dev/jsfd         JavaStation flash disk
1738
1739100 char        Telephony for Linux
1740                  0 = /dev/phone0       First telephony device
1741                  1 = /dev/phone1       Second telephony device
1742                    ...
1743
1744101 char        Motorola DSP 56xxx board
1745                  0 = /dev/mdspstat     Status information
1746                  1 = /dev/mdsp1        First DSP board I/O controls
1747                    ...
1748                 16 = /dev/mdsp16       16th DSP board I/O controls
1749
1750101 block       AMI HyperDisk RAID controller
1751                  0 = /dev/amiraid/ar0  First array whole disk
1752                 16 = /dev/amiraid/ar1  Second array whole disk
1753                    ...
1754                240 = /dev/amiraid/ar15 16th array whole disk
1755
1756                For each device, partitions are added as:
1757                  0 = /dev/amiraid/ar?    Whole disk
1758                  1 = /dev/amiraid/ar?p1  First partition
1759                  2 = /dev/amiraid/ar?p2  Second partition
1760                    ...
1761                 15 = /dev/amiraid/ar?p15 15th partition
1762
1763102 char
1764
1765102 block       Compressed block device
1766                  0 = /dev/cbd/a        First compressed block device, whole device
1767                 16 = /dev/cbd/b        Second compressed block device, whole device
1768                    ...
1769                240 = /dev/cbd/p        16th compressed block device, whole device
1770
1771                Partitions are handled in the same way as for IDE
1772                disks (see major number 3) except that the limit on
1773                partitions is 15.
1774
1775103 char        Arla network file system
1776                  0 = /dev/nnpfs0       First NNPFS device
1777                  1 = /dev/nnpfs1       Second NNPFS device
1778
1779                Arla is a free clone of the Andrew File System, AFS.
1780                The NNPFS device gives user mode filesystem
1781                implementations a kernel presence for caching and easy
1782                mounting.  For more information about the project,
1783                write to <arla-drinkers@stacken.kth.se> or see
1784                http://www.stacken.kth.se/project/arla/
1785
1786103 block       Audit device
1787                  0 = /dev/audit        Audit device
1788
1789104 char        Flash BIOS support
1790
1791104 block       Compaq Next Generation Drive Array, first controller
1792                  0 = /dev/cciss/c0d0   First logical drive, whole disk
1793                 16 = /dev/cciss/c0d1   Second logical drive, whole disk
1794                    ...
1795                240 = /dev/cciss/c0d15  16th logical drive, whole disk
1796
1797                Partitions are handled the same way as for Mylex
1798                DAC960 (see major number 48) except that the limit on
1799                partitions is 15.
1800
1801105 char        Comtrol VS-1000 serial controller
1802                  0 = /dev/ttyV0        First VS-1000 port
1803                  1 = /dev/ttyV1        Second VS-1000 port
1804                    ...
1805
1806105 block       Compaq Next Generation Drive Array, second controller
1807                  0 = /dev/cciss/c1d0   First logical drive, whole disk
1808                 16 = /dev/cciss/c1d1   Second logical drive, whole disk
1809                    ...
1810                240 = /dev/cciss/c1d15  16th logical drive, whole disk
1811
1812                Partitions are handled the same way as for Mylex
1813                DAC960 (see major number 48) except that the limit on
1814                partitions is 15.
1815
1816106 char        Comtrol VS-1000 serial controller - alternate devices
1817                  0 = /dev/cuv0         First VS-1000 port
1818                  1 = /dev/cuv1         Second VS-1000 port
1819                    ...
1820
1821106 block       Compaq Next Generation Drive Array, third controller
1822                  0 = /dev/cciss/c2d0   First logical drive, whole disk
1823                 16 = /dev/cciss/c2d1   Second logical drive, whole disk
1824                    ...
1825                240 = /dev/cciss/c2d15  16th logical drive, whole disk
1826
1827                Partitions are handled the same way as for Mylex
1828                DAC960 (see major number 48) except that the limit on
1829                partitions is 15.
1830
1831107 char        3Dfx Voodoo Graphics device
1832                  0 = /dev/3dfx         Primary 3Dfx graphics device
1833
1834107 block       Compaq Next Generation Drive Array, fourth controller
1835                  0 = /dev/cciss/c3d0   First logical drive, whole disk
1836                 16 = /dev/cciss/c3d1   Second logical drive, whole disk
1837                    ...
1838                240 = /dev/cciss/c3d15  16th logical drive, whole disk
1839
1840                Partitions are handled the same way as for Mylex
1841                DAC960 (see major number 48) except that the limit on
1842                partitions is 15.
1843
1844108 char        Device independent PPP interface
1845                  0 = /dev/ppp          Device independent PPP interface
1846
1847108 block       Compaq Next Generation Drive Array, fifth controller
1848                  0 = /dev/cciss/c4d0   First logical drive, whole disk
1849                 16 = /dev/cciss/c4d1   Second logical drive, whole disk
1850                    ...
1851                240 = /dev/cciss/c4d15  16th logical drive, whole disk
1852
1853                Partitions are handled the same way as for Mylex
1854                DAC960 (see major number 48) except that the limit on
1855                partitions is 15.
1856
1857109 char        Reserved for logical volume manager
1858
1859109 block       Compaq Next Generation Drive Array, sixth controller
1860                  0 = /dev/cciss/c5d0   First logical drive, whole disk
1861                 16 = /dev/cciss/c5d1   Second logical drive, whole disk
1862                    ...
1863                240 = /dev/cciss/c5d15  16th logical drive, whole disk
1864
1865                Partitions are handled the same way as for Mylex
1866                DAC960 (see major number 48) except that the limit on
1867                partitions is 15.
1868
1869110 char        miroMEDIA Surround board
1870                  0 = /dev/srnd0        First miroMEDIA Surround board
1871                  1 = /dev/srnd1        Second miroMEDIA Surround board
1872                    ...
1873
1874110 block       Compaq Next Generation Drive Array, seventh controller
1875                  0 = /dev/cciss/c6d0   First logical drive, whole disk
1876                 16 = /dev/cciss/c6d1   Second logical drive, whole disk
1877                    ...
1878                240 = /dev/cciss/c6d15  16th logical drive, whole disk
1879
1880                Partitions are handled the same way as for Mylex
1881                DAC960 (see major number 48) except that the limit on
1882                partitions is 15.
1883
1884111 char
1885
1886111 block       Compaq Next Generation Drive Array, eighth controller
1887                  0 = /dev/cciss/c7d0   First logical drive, whole disk
1888                 16 = /dev/cciss/c7d1   Second logical drive, whole disk
1889                    ...
1890                240 = /dev/cciss/c7d15  16th logical drive, whole disk
1891
1892                Partitions are handled the same way as for Mylex
1893                DAC960 (see major number 48) except that the limit on
1894                partitions is 15.
1895
1896112 char        ISI serial card
1897                  0 = /dev/ttyM0        First ISI port
1898                  1 = /dev/ttyM1        Second ISI port
1899                    ...
1900
1901                There is currently a device-naming conflict between
1902                these and PAM multimodems (major 78).
1903
1904112 block       IBM iSeries virtual disk
1905                  0 = /dev/iseries/vda  First virtual disk, whole disk
1906                  8 = /dev/iseries/vdb  Second virtual disk, whole disk
1907                    ...
1908                200 = /dev/iseries/vdz  26th virtual disk, whole disk
1909                208 = /dev/iseries/vdaa 27th virtual disk, whole disk
1910                    ...
1911                248 = /dev/iseries/vdaf 32nd virtual disk, whole disk
1912
1913                Partitions are handled in the same way as for IDE
1914                disks (see major number 3) except that the limit on
1915                partitions is 7.
1916
1917113 char        ISI serial card - alternate devices
1918                  0 = /dev/cum0         Callout device for ttyM0
1919                  1 = /dev/cum1         Callout device for ttyM1
1920                    ...
1921
1922113 block       IBM iSeries virtual CD-ROM
1923                  0 = /dev/iseries/vcda First virtual CD-ROM
1924                  1 = /dev/iseries/vcdb Second virtual CD-ROM
1925                    ...
1926
1927114 char        Picture Elements ISE board
1928                  0 = /dev/ise0         First ISE board
1929                  1 = /dev/ise1         Second ISE board
1930                    ...
1931                128 = /dev/isex0        Control node for first ISE board
1932                129 = /dev/isex1        Control node for second ISE board
1933                    ...
1934
1935                The ISE board is an embedded computer, optimized for
1936                image processing. The /dev/iseN nodes are the general
1937                I/O access to the board, the /dev/isex0 nodes command
1938                nodes used to control the board.
1939
1940114 block       IDE BIOS powered software RAID interfaces such as the
1941                Promise Fastrak
1942
1943                  0 = /dev/ataraid/d0
1944                  1 = /dev/ataraid/d0p1
1945                  2 = /dev/ataraid/d0p2
1946                  ...
1947                 16 = /dev/ataraid/d1
1948                 17 = /dev/ataraid/d1p1
1949                 18 = /dev/ataraid/d1p2
1950                  ...
1951                255 = /dev/ataraid/d15p15
1952
1953                Partitions are handled in the same way as for IDE
1954                disks (see major number 3) except that the limit on
1955                partitions is 15.
1956
1957115 char        TI link cable devices (115 was formerly the console driver speaker)
1958                  0 = /dev/tipar0    Parallel cable on first parallel port
1959                  ...
1960                  7 = /dev/tipar7    Parallel cable on seventh parallel port
1961
1962                  8 = /dev/tiser0    Serial cable on first serial port
1963                  ...
1964                 15 = /dev/tiser7    Serial cable on seventh serial port
1965
1966                 16 = /dev/tiusb0    First USB cable
1967                  ...
1968                 47 = /dev/tiusb31   32nd USB cable
1969
1970115 block       NetWare (NWFS) Devices (0-255)
1971
1972                The NWFS (NetWare) devices are used to present a
1973                collection of NetWare Mirror Groups or NetWare
1974                Partitions as a logical storage segment for
1975                use in mounting NetWare volumes.  A maximum of
1976                256 NetWare volumes can be supported in a single
1977                machine.
1978
1979                http://cgfa.telepac.pt/ftp2/kernel.org/linux/kernel/people/jmerkey/nwfs/
1980
1981                0 = /dev/nwfs/v0    First NetWare (NWFS) Logical Volume
1982                1 = /dev/nwfs/v1    Second NetWare (NWFS) Logical Volume
1983                2 = /dev/nwfs/v2    Third NetWare (NWFS) Logical Volume
1984                      ...
1985                255 = /dev/nwfs/v255    Last NetWare (NWFS) Logical Volume
1986
1987116 char        Advanced Linux Sound Driver (ALSA)
1988
1989116 block       MicroMemory battery backed RAM adapter (NVRAM)
1990                Supports 16 boards, 15 partitions each.
1991                Requested by neilb at cse.unsw.edu.au.
1992
1993                 0 = /dev/umem/d0      Whole of first board
1994                 1 = /dev/umem/d0p1    First partition of first board
1995                 2 = /dev/umem/d0p2    Second partition of first board
1996                15 = /dev/umem/d0p15   15th partition of first board
1997
1998                16 = /dev/umem/d1      Whole of second board
1999                17 = /dev/umem/d1p1    First partition of second board
2000                    ...
2001                255= /dev/umem/d15p15  15th partition of 16th board.
2002
2003117 char        COSA/SRP synchronous serial card
2004                  0 = /dev/cosa0c0      1st board, 1st channel
2005                  1 = /dev/cosa0c1      1st board, 2nd channel
2006                    ...
2007                 16 = /dev/cosa1c0      2nd board, 1st channel
2008                 17 = /dev/cosa1c1      2nd board, 2nd channel
2009                    ...
2010
2011117 block       Enterprise Volume Management System (EVMS)
2012
2013                The EVMS driver uses a layered, plug-in model to provide
2014                unparalleled flexibility and extensibility in managing
2015                storage.  This allows for easy expansion or customization
2016                of various levels of volume management.  Requested by
2017                Mark Peloquin (peloquin at us.ibm.com).
2018
2019                Note: EVMS populates and manages all the devnodes in
2020                /dev/evms.
2021
2022                http://sf.net/projects/evms
2023
2024                  0 = /dev/evms/block_device   EVMS block device
2025                  1 = /dev/evms/legacyname1    First EVMS legacy device
2026                  2 = /dev/evms/legacyname2    Second EVMS legacy device
2027                    ...
2028                    Both ranges can grow (down or up) until they meet.
2029                    ...
2030                254 = /dev/evms/EVMSname2      Second EVMS native device
2031                255 = /dev/evms/EVMSname1      First EVMS native device
2032
2033                Note: legacyname(s) are derived from the normal legacy
2034                device names.  For example, /dev/hda5 would become
2035                /dev/evms/hda5.
2036
2037118 char        IBM Cryptographic Accelerator
2038                  0 = /dev/ica  Virtual interface to all IBM Crypto Accelerators
2039                  1 = /dev/ica0 IBMCA Device 0
2040                  2 = /dev/ica1 IBMCA Device 1
2041                    ...
2042
2043119 char        VMware virtual network control
2044                  0 = /dev/vnet0        1st virtual network
2045                  1 = /dev/vnet1        2nd virtual network
2046                    ...
2047
2048120-127 char    LOCAL/EXPERIMENTAL USE
2049
2050120-127 block   LOCAL/EXPERIMENTAL USE
2051                Allocated for local/experimental use.  For devices not
2052                assigned official numbers, these ranges should be
2053                used in order to avoid conflicting with future assignments.
2054
2055128-135 char    Unix98 PTY masters
2056
2057                These devices should not have corresponding device
2058                nodes; instead they should be accessed through the
2059                /dev/ptmx cloning interface.
2060
2061128 block       SCSI disk devices (128-143)
2062                  0 = /dev/sddy         129th SCSI disk whole disk
2063                 16 = /dev/sddz         130th SCSI disk whole disk
2064                 32 = /dev/sdea         131th SCSI disk whole disk
2065                    ...
2066                240 = /dev/sden         144th SCSI disk whole disk
2067
2068                Partitions are handled in the same way as for IDE
2069                disks (see major number 3) except that the limit on
2070                partitions is 15.
2071
2072129 block       SCSI disk devices (144-159)
2073                  0 = /dev/sdeo         145th SCSI disk whole disk
2074                 16 = /dev/sdep         146th SCSI disk whole disk
2075                 32 = /dev/sdeq         147th SCSI disk whole disk
2076                    ...
2077                240 = /dev/sdfd         160th SCSI disk whole disk
2078
2079                Partitions are handled in the same way as for IDE
2080                disks (see major number 3) except that the limit on
2081                partitions is 15.
2082
2083130 char        (Misc devices)
2084
2085130 block       SCSI disk devices (160-175)
2086                  0 = /dev/sdfe         161st SCSI disk whole disk
2087                 16 = /dev/sdff         162nd SCSI disk whole disk
2088                 32 = /dev/sdfg         163rd SCSI disk whole disk
2089                    ...
2090                240 = /dev/sdft         176th SCSI disk whole disk
2091
2092                Partitions are handled in the same way as for IDE
2093                disks (see major number 3) except that the limit on
2094                partitions is 15.
2095
2096131 block       SCSI disk devices (176-191)
2097                  0 = /dev/sdfu         177th SCSI disk whole disk
2098                 16 = /dev/sdfv         178th SCSI disk whole disk
2099                 32 = /dev/sdfw         179th SCSI disk whole disk
2100                    ...
2101                240 = /dev/sdgj         192nd SCSI disk whole disk
2102
2103                Partitions are handled in the same way as for IDE
2104                disks (see major number 3) except that the limit on
2105                partitions is 15.
2106
2107132 block       SCSI disk devices (192-207)
2108                  0 = /dev/sdgk         193rd SCSI disk whole disk
2109                 16 = /dev/sdgl         194th SCSI disk whole disk
2110                 32 = /dev/sdgm         195th SCSI disk whole disk
2111                    ...
2112                240 = /dev/sdgz         208th SCSI disk whole disk
2113
2114                Partitions are handled in the same way as for IDE
2115                disks (see major number 3) except that the limit on
2116                partitions is 15.
2117
2118133 block       SCSI disk devices (208-223)
2119                  0 = /dev/sdha         209th SCSI disk whole disk
2120                 16 = /dev/sdhb         210th SCSI disk whole disk
2121                 32 = /dev/sdhc         211th SCSI disk whole disk
2122                    ...
2123                240 = /dev/sdhp         224th SCSI disk whole disk
2124
2125                Partitions are handled in the same way as for IDE
2126                disks (see major number 3) except that the limit on
2127                partitions is 15.
2128
2129134 block       SCSI disk devices (224-239)
2130                  0 = /dev/sdhq         225th SCSI disk whole disk
2131                 16 = /dev/sdhr         226th SCSI disk whole disk
2132                 32 = /dev/sdhs         227th SCSI disk whole disk
2133                    ...
2134                240 = /dev/sdif         240th SCSI disk whole disk
2135
2136                Partitions are handled in the same way as for IDE
2137                disks (see major number 3) except that the limit on
2138                partitions is 15.
2139
2140135 block       SCSI disk devices (240-255)
2141                  0 = /dev/sdig         241st SCSI disk whole disk
2142                 16 = /dev/sdih         242nd SCSI disk whole disk
2143                 32 = /dev/sdih         243rd SCSI disk whole disk
2144                    ...
2145                240 = /dev/sdiv         256th SCSI disk whole disk
2146
2147                Partitions are handled in the same way as for IDE
2148                disks (see major number 3) except that the limit on
2149                partitions is 15.
2150
2151136-143 char    Unix98 PTY slaves
2152                  0 = /dev/pts/0        First Unix98 pseudo-TTY
2153                  1 = /dev/pts/1        Second Unix98 pseudo-TTY
2154                    ...
2155
2156                These device nodes are automatically generated with
2157                the proper permissions and modes by mounting the
2158                devpts filesystem onto /dev/pts with the appropriate
2159                mount options (distribution dependent, however, on
2160                *most* distributions the appropriate options are
2161                "mode=0620,gid=<gid of the "tty" group>".)
2162
2163136 block       Mylex DAC960 PCI RAID controller; ninth controller
2164                  0 = /dev/rd/c8d0      First disk, whole disk
2165                  8 = /dev/rd/c8d1      Second disk, whole disk
2166                    ...
2167                248 = /dev/rd/c8d31     32nd disk, whole disk
2168
2169                Partitions are handled as for major 48.
2170
2171137 block       Mylex DAC960 PCI RAID controller; tenth controller
2172                  0 = /dev/rd/c9d0      First disk, whole disk
2173                  8 = /dev/rd/c9d1      Second disk, whole disk
2174                    ...
2175                248 = /dev/rd/c9d31     32nd disk, whole disk
2176
2177                Partitions are handled as for major 48.
2178
2179138 block       Mylex DAC960 PCI RAID controller; eleventh controller
2180                  0 = /dev/rd/c10d0     First disk, whole disk
2181                  8 = /dev/rd/c10d1     Second disk, whole disk
2182                    ...
2183                248 = /dev/rd/c10d31    32nd disk, whole disk
2184
2185                Partitions are handled as for major 48.
2186
2187139 block       Mylex DAC960 PCI RAID controller; twelfth controller
2188                  0 = /dev/rd/c11d0     First disk, whole disk
2189                  8 = /dev/rd/c11d1     Second disk, whole disk
2190                    ...
2191                248 = /dev/rd/c11d31    32nd disk, whole disk
2192
2193                Partitions are handled as for major 48.
2194
2195140 block       Mylex DAC960 PCI RAID controller; thirteenth controller
2196                  0 = /dev/rd/c12d0     First disk, whole disk
2197                  8 = /dev/rd/c12d1     Second disk, whole disk
2198                    ...
2199                248 = /dev/rd/c12d31    32nd disk, whole disk
2200
2201                Partitions are handled as for major 48.
2202
2203141 block       Mylex DAC960 PCI RAID controller; fourteenth controller
2204                  0 = /dev/rd/c13d0     First disk, whole disk
2205                  8 = /dev/rd/c13d1     Second disk, whole disk
2206                    ...
2207                248 = /dev/rd/c13d31    32nd disk, whole disk
2208
2209                Partitions are handled as for major 48.
2210
2211142 block       Mylex DAC960 PCI RAID controller; fifteenth controller
2212                  0 = /dev/rd/c14d0     First disk, whole disk
2213                  8 = /dev/rd/c14d1     Second disk, whole disk
2214                    ...
2215                248 = /dev/rd/c14d31    32nd disk, whole disk
2216
2217                Partitions are handled as for major 48.
2218
2219143 block       Mylex DAC960 PCI RAID controller; sixteenth controller
2220                  0 = /dev/rd/c15d0     First disk, whole disk
2221                  8 = /dev/rd/c15d1     Second disk, whole disk
2222                    ...
2223                248 = /dev/rd/c15d31    32nd disk, whole disk
2224
2225                Partitions are handled as for major 48.
2226
2227144 char        Encapsulated PPP
2228                  0 = /dev/pppox0       First PPP over Ethernet
2229                    ...
2230                 63 = /dev/pppox63      64th PPP over Ethernet
2231
2232                This is primarily used for ADSL.
2233
2234                The SST 5136-DN DeviceNet interface driver has been
2235                relocated to major 183 due to an unfortunate conflict.
2236
2237144 block       Expansion Area #1 for more non-device (e.g. NFS) mounts
2238                  0 = mounted device 256
2239                255 = mounted device 511
2240
2241145 char        SAM9407-based soundcard
2242                  0 = /dev/sam0_mixer
2243                  1 = /dev/sam0_sequencer
2244                  2 = /dev/sam0_midi00
2245                  3 = /dev/sam0_dsp
2246                  4 = /dev/sam0_audio
2247                  6 = /dev/sam0_sndstat
2248                 18 = /dev/sam0_midi01
2249                 34 = /dev/sam0_midi02
2250                 50 = /dev/sam0_midi03
2251                 64 = /dev/sam1_mixer
2252                    ...
2253                128 = /dev/sam2_mixer
2254                    ...
2255                192 = /dev/sam3_mixer
2256                    ...
2257
2258                Device functions match OSS, but offer a number of
2259                addons, which are sam9407 specific.  OSS can be
2260                operated simultaneously, taking care of the codec.
2261
2262145 block       Expansion Area #2 for more non-device (e.g. NFS) mounts
2263                  0 = mounted device 512
2264                255 = mounted device 767
2265
2266146 char        SYSTRAM SCRAMNet mirrored-memory network
2267                  0 = /dev/scramnet0    First SCRAMNet device
2268                  1 = /dev/scramnet1    Second SCRAMNet device
2269                    ...
2270
2271146 block       Expansion Area #3 for more non-device (e.g. NFS) mounts
2272                  0 = mounted device 768
2273                255 = mounted device 1023
2274
2275147 char        Aureal Semiconductor Vortex Audio device
2276                  0 = /dev/aureal0      First Aureal Vortex
2277                  1 = /dev/aureal1      Second Aureal Vortex
2278                    ...
2279
2280147 block       Distributed Replicated Block Device (DRBD)
2281                  0 = /dev/drbd0        First DRBD device
2282                  1 = /dev/drbd1        Second DRBD device
2283                    ...
2284
2285148 char        Technology Concepts serial card
2286                  0 = /dev/ttyT0        First TCL port
2287                  1 = /dev/ttyT1        Second TCL port
2288                    ...
2289
2290149 char        Technology Concepts serial card - alternate devices
2291                  0 = /dev/cut0         Callout device for ttyT0
2292                  1 = /dev/cut0         Callout device for ttyT1
2293                    ...
2294
2295150 char        Real-Time Linux FIFOs
2296                  0 = /dev/rtf0         First RTLinux FIFO
2297                  1 = /dev/rtf1         Second RTLinux FIFO
2298                    ...
2299
2300151 char        DPT I2O SmartRaid V controller
2301                  0 = /dev/dpti0        First DPT I2O adapter
2302                  1 = /dev/dpti1        Second DPT I2O adapter
2303                    ...
2304
2305152 char        EtherDrive Control Device
2306                  0 = /dev/etherd/ctl   Connect/Disconnect an EtherDrive
2307                  1 = /dev/etherd/err   Monitor errors
2308                  2 = /dev/etherd/raw   Raw AoE packet monitor
2309
2310152 block       EtherDrive Block Devices
2311                  0 = /dev/etherd/0     EtherDrive 0
2312                    ...
2313                255 = /dev/etherd/255   EtherDrive 255
2314
2315153 char        SPI Bus Interface (sometimes referred to as MicroWire)
2316                  0 = /dev/spi0         First SPI device on the bus
2317                  1 = /dev/spi1         Second SPI device on the bus
2318                    ...
2319                 15 = /dev/spi15        Sixteenth SPI device on the bus
2320
2321153 block       Enhanced Metadisk RAID (EMD) storage units
2322                  0 = /dev/emd/0        First unit
2323                  1 = /dev/emd/0p1      Partition 1 on First unit
2324                  2 = /dev/emd/0p2      Partition 2 on First unit
2325                    ...
2326                 15 = /dev/emd/0p15     Partition 15 on First unit
2327
2328                 16 = /dev/emd/1        Second unit
2329                 32 = /dev/emd/2        Third unit
2330                    ...
2331                240 = /dev/emd/15       Sixteenth unit
2332
2333                Partitions are handled in the same way as for IDE
2334                disks (see major number 3) except that the limit on
2335                partitions is 15.
2336
2337154 char        Specialix RIO serial card
2338                  0 = /dev/ttySR0       First RIO port
2339                    ...
2340                255 = /dev/ttySR255     256th RIO port
2341
2342155 char        Specialix RIO serial card - alternate devices
2343                  0 = /dev/cusr0        Callout device for ttySR0
2344                    ...
2345                255 = /dev/cusr255      Callout device for ttySR255
2346
2347156 char        Specialix RIO serial card
2348                  0 = /dev/ttySR256     257th RIO port
2349                    ...
2350                255 = /dev/ttySR511     512th RIO port
2351
2352157 char        Specialix RIO serial card - alternate devices
2353                  0 = /dev/cusr256      Callout device for ttySR256
2354                    ...
2355                255 = /dev/cusr511      Callout device for ttySR511
2356
2357158 char        Dialogic GammaLink fax driver
2358                  0 = /dev/gfax0        GammaLink channel 0
2359                  1 = /dev/gfax1        GammaLink channel 1
2360                    ...
2361
2362159 char        RESERVED
2363
2364159 block       RESERVED
2365
2366160 char        General Purpose Instrument Bus (GPIB)
2367                  0 = /dev/gpib0        First GPIB bus
2368                  1 = /dev/gpib1        Second GPIB bus
2369                    ...
2370
2371160 block       Carmel 8-port SATA Disks on First Controller
2372                  0 = /dev/carmel/0     SATA disk 0 whole disk
2373                  1 = /dev/carmel/0p1   SATA disk 0 partition 1
2374                    ...
2375                 31 = /dev/carmel/0p31  SATA disk 0 partition 31
2376
2377                 32 = /dev/carmel/1     SATA disk 1 whole disk
2378                 64 = /dev/carmel/2     SATA disk 2 whole disk
2379                    ...
2380                224 = /dev/carmel/7     SATA disk 7 whole disk
2381
2382                Partitions are handled in the same way as for IDE
2383                disks (see major number 3) except that the limit on
2384                partitions is 31.
2385
2386161 char        IrCOMM devices (IrDA serial/parallel emulation)
2387                  0 = /dev/ircomm0      First IrCOMM device
2388                  1 = /dev/ircomm1      Second IrCOMM device
2389                    ...
2390                 16 = /dev/irlpt0       First IrLPT device
2391                 17 = /dev/irlpt1       Second IrLPT device
2392                    ...
2393
2394161 block       Carmel 8-port SATA Disks on Second Controller
2395                  0 = /dev/carmel/8     SATA disk 8 whole disk
2396                  1 = /dev/carmel/8p1   SATA disk 8 partition 1
2397                    ...
2398                 31 = /dev/carmel/8p31  SATA disk 8 partition 31
2399
2400                 32 = /dev/carmel/9     SATA disk 9 whole disk
2401                 64 = /dev/carmel/10    SATA disk 10 whole disk
2402                    ...
2403                224 = /dev/carmel/15    SATA disk 15 whole disk
2404
2405                Partitions are handled in the same way as for IDE
2406                disks (see major number 3) except that the limit on
2407                partitions is 31.
2408
2409162 char        Raw block device interface
2410                  0 = /dev/rawctl       Raw I/O control device
2411                  1 = /dev/raw/raw1     First raw I/O device
2412                  2 = /dev/raw/raw2     Second raw I/O device
2413                    ...
2414                 max minor number of raw device is set by kernel config
2415                 MAX_RAW_DEVS or raw module parameter 'max_raw_devs'
2416
2417163 char
2418
2419164 char        Chase Research AT/PCI-Fast serial card
2420                  0 = /dev/ttyCH0       AT/PCI-Fast board 0, port 0
2421                    ...
2422                 15 = /dev/ttyCH15      AT/PCI-Fast board 0, port 15
2423                 16 = /dev/ttyCH16      AT/PCI-Fast board 1, port 0
2424                    ...
2425                 31 = /dev/ttyCH31      AT/PCI-Fast board 1, port 15
2426                 32 = /dev/ttyCH32      AT/PCI-Fast board 2, port 0
2427                    ...
2428                 47 = /dev/ttyCH47      AT/PCI-Fast board 2, port 15
2429                 48 = /dev/ttyCH48      AT/PCI-Fast board 3, port 0
2430                    ...
2431                 63 = /dev/ttyCH63      AT/PCI-Fast board 3, port 15
2432
2433165 char        Chase Research AT/PCI-Fast serial card - alternate devices
2434                  0 = /dev/cuch0        Callout device for ttyCH0
2435                    ...
2436                 63 = /dev/cuch63       Callout device for ttyCH63
2437
2438166 char        ACM USB modems
2439                  0 = /dev/ttyACM0      First ACM modem
2440                  1 = /dev/ttyACM1      Second ACM modem
2441                    ...
2442
2443167 char        ACM USB modems - alternate devices
2444                  0 = /dev/cuacm0       Callout device for ttyACM0
2445                  1 = /dev/cuacm1       Callout device for ttyACM1
2446                    ...
2447
2448168 char        Eracom CSA7000 PCI encryption adaptor
2449                  0 = /dev/ecsa0        First CSA7000
2450                  1 = /dev/ecsa1        Second CSA7000
2451                    ...
2452
2453169 char        Eracom CSA8000 PCI encryption adaptor
2454                  0 = /dev/ecsa8-0      First CSA8000
2455                  1 = /dev/ecsa8-1      Second CSA8000
2456                    ...
2457
2458170 char        AMI MegaRAC remote access controller
2459                  0 = /dev/megarac0     First MegaRAC card
2460                  1 = /dev/megarac1     Second MegaRAC card
2461                    ...
2462
2463171 char        Reserved for IEEE 1394 (Firewire)
2464
2465172 char        Moxa Intellio serial card
2466                  0 = /dev/ttyMX0       First Moxa port
2467                  1 = /dev/ttyMX1       Second Moxa port
2468                    ...
2469                127 = /dev/ttyMX127     128th Moxa port
2470                128 = /dev/moxactl      Moxa control port
2471
2472173 char        Moxa Intellio serial card - alternate devices
2473                  0 = /dev/cumx0        Callout device for ttyMX0
2474                  1 = /dev/cumx1        Callout device for ttyMX1
2475                    ...
2476                127 = /dev/cumx127      Callout device for ttyMX127
2477
2478174 char        SmartIO serial card
2479                  0 = /dev/ttySI0       First SmartIO port
2480                  1 = /dev/ttySI1       Second SmartIO port
2481                    ...
2482
2483175 char        SmartIO serial card - alternate devices
2484                  0 = /dev/cusi0        Callout device for ttySI0
2485                  1 = /dev/cusi1        Callout device for ttySI1
2486                    ...
2487
2488176 char        nCipher nFast PCI crypto accelerator
2489                  0 = /dev/nfastpci0    First nFast PCI device
2490                  1 = /dev/nfastpci1    First nFast PCI device
2491                    ...
2492
2493177 char        TI PCILynx memory spaces
2494                  0 = /dev/pcilynx/aux0  AUX space of first PCILynx card
2495                    ...
2496                 15 = /dev/pcilynx/aux15 AUX space of 16th PCILynx card
2497                 16 = /dev/pcilynx/rom0  ROM space of first PCILynx card
2498                    ...
2499                 31 = /dev/pcilynx/rom15 ROM space of 16th PCILynx card
2500                 32 = /dev/pcilynx/ram0  RAM space of first PCILynx card
2501                    ...
2502                 47 = /dev/pcilynx/ram15 RAM space of 16th PCILynx card
2503
2504178 char        Giganet cLAN1xxx virtual interface adapter
2505                  0 = /dev/clanvi0      First cLAN adapter
2506                  1 = /dev/clanvi1      Second cLAN adapter
2507                    ...
2508
2509179 block       MMC block devices
2510                  0 = /dev/mmcblk0      First SD/MMC card
2511                  1 = /dev/mmcblk0p1    First partition on first MMC card
2512                  8 = /dev/mmcblk1      Second SD/MMC card
2513                    ...
2514
2515                The start of next SD/MMC card can be configured with
2516                CONFIG_MMC_BLOCK_MINORS, or overridden at boot/modprobe
2517                time using the mmcblk.perdev_minors option. That would
2518                bump the offset between each card to be the configured
2519                value instead of the default 8.
2520
2521179 char        CCube DVXChip-based PCI products
2522                  0 = /dev/dvxirq0      First DVX device
2523                  1 = /dev/dvxirq1      Second DVX device
2524                    ...
2525
2526180 char        USB devices
2527                  0 = /dev/usb/lp0      First USB printer
2528                    ...
2529                 15 = /dev/usb/lp15     16th USB printer
2530                 48 = /dev/usb/scanner0 First USB scanner
2531                    ...
2532                 63 = /dev/usb/scanner15 16th USB scanner
2533                 64 = /dev/usb/rio500   Diamond Rio 500
2534                 65 = /dev/usb/usblcd   USBLCD Interface (info@usblcd.de)
2535                 66 = /dev/usb/cpad0    Synaptics cPad (mouse/LCD)
2536                 96 = /dev/usb/hiddev0  1st USB HID device
2537                    ...
2538                111 = /dev/usb/hiddev15 16th USB HID device
2539                112 = /dev/usb/auer0    1st auerswald ISDN device
2540                    ...
2541                127 = /dev/usb/auer15   16th auerswald ISDN device
2542                128 = /dev/usb/brlvgr0  First Braille Voyager device
2543                    ...
2544                131 = /dev/usb/brlvgr3  Fourth Braille Voyager device
2545                132 = /dev/usb/idmouse  ID Mouse (fingerprint scanner) device
2546                133 = /dev/usb/sisusbvga1       First SiSUSB VGA device
2547                    ...
2548                140 = /dev/usb/sisusbvga8       Eighth SISUSB VGA device
2549                144 = /dev/usb/lcd      USB LCD device
2550                160 = /dev/usb/legousbtower0    1st USB Legotower device
2551                    ...
2552                175 = /dev/usb/legousbtower15   16th USB Legotower device
2553                176 = /dev/usb/usbtmc1  First USB TMC device
2554                   ...
2555                191 = /dev/usb/usbtmc16 16th USB TMC device
2556                192 = /dev/usb/yurex1   First USB Yurex device
2557                   ...
2558                209 = /dev/usb/yurex16  16th USB Yurex device
2559
2560180 block       USB block devices
2561                  0 = /dev/uba          First USB block device
2562                  8 = /dev/ubb          Second USB block device
2563                 16 = /dev/ubc          Third USB block device
2564                    ...
2565
2566181 char        Conrad Electronic parallel port radio clocks
2567                  0 = /dev/pcfclock0    First Conrad radio clock
2568                  1 = /dev/pcfclock1    Second Conrad radio clock
2569                    ...
2570
2571182 char        Picture Elements THR2 binarizer
2572                  0 = /dev/pethr0       First THR2 board
2573                  1 = /dev/pethr1       Second THR2 board
2574                    ...
2575
2576183 char        SST 5136-DN DeviceNet interface
2577                  0 = /dev/ss5136dn0    First DeviceNet interface
2578                  1 = /dev/ss5136dn1    Second DeviceNet interface
2579                    ...
2580
2581                This device used to be assigned to major number 144.
2582                It had to be moved due to an unfortunate conflict.
2583
2584184 char        Picture Elements' video simulator/sender
2585                  0 = /dev/pevss0       First sender board
2586                  1 = /dev/pevss1       Second sender board
2587                    ...
2588
2589185 char        InterMezzo high availability file system
2590                  0 = /dev/intermezzo0  First cache manager
2591                  1 = /dev/intermezzo1  Second cache manager
2592                    ...
2593
2594                See http://web.archive.org/web/20080115195241/
2595                http://inter-mezzo.org/index.html
2596
2597186 char        Object-based storage control device
2598                  0 = /dev/obd0         First obd control device
2599                  1 = /dev/obd1         Second obd control device
2600                    ...
2601
2602                See ftp://ftp.lustre.org/pub/obd for code and information.
2603
2604187 char        DESkey hardware encryption device
2605                  0 = /dev/deskey0      First DES key
2606                  1 = /dev/deskey1      Second DES key
2607                    ...
2608
2609188 char        USB serial converters
2610                  0 = /dev/ttyUSB0      First USB serial converter
2611                  1 = /dev/ttyUSB1      Second USB serial converter
2612                    ...
2613
2614189 char        USB serial converters - alternate devices
2615                  0 = /dev/cuusb0       Callout device for ttyUSB0
2616                  1 = /dev/cuusb1       Callout device for ttyUSB1
2617                    ...
2618
2619190 char        Kansas City tracker/tuner card
2620                  0 = /dev/kctt0        First KCT/T card
2621                  1 = /dev/kctt1        Second KCT/T card
2622                    ...
2623
2624191 char        Reserved for PCMCIA
2625
2626192 char        Kernel profiling interface
2627                  0 = /dev/profile      Profiling control device
2628                  1 = /dev/profile0     Profiling device for CPU 0
2629                  2 = /dev/profile1     Profiling device for CPU 1
2630                    ...
2631
2632193 char        Kernel event-tracing interface
2633                  0 = /dev/trace        Tracing control device
2634                  1 = /dev/trace0       Tracing device for CPU 0
2635                  2 = /dev/trace1       Tracing device for CPU 1
2636                    ...
2637
2638194 char        linVideoStreams (LINVS)
2639                  0 = /dev/mvideo/status0       Video compression status
2640                  1 = /dev/mvideo/stream0       Video stream
2641                  2 = /dev/mvideo/frame0        Single compressed frame
2642                  3 = /dev/mvideo/rawframe0     Raw uncompressed frame
2643                  4 = /dev/mvideo/codec0        Direct codec access
2644                  5 = /dev/mvideo/video4linux0  Video4Linux compatibility
2645
2646                 16 = /dev/mvideo/status1       Second device
2647                    ...
2648                 32 = /dev/mvideo/status2       Third device
2649                    ...
2650                    ...
2651                240 = /dev/mvideo/status15      16th device
2652                    ...
2653
2654195 char        Nvidia graphics devices
2655                  0 = /dev/nvidia0              First Nvidia card
2656                  1 = /dev/nvidia1              Second Nvidia card
2657                    ...
2658                255 = /dev/nvidiactl            Nvidia card control device
2659
2660196 char        Tormenta T1 card
2661                  0 = /dev/tor/0                Master control channel for all cards
2662                  1 = /dev/tor/1                First DS0
2663                  2 = /dev/tor/2                Second DS0
2664                    ...
2665                 48 = /dev/tor/48               48th DS0
2666                 49 = /dev/tor/49               First pseudo-channel
2667                 50 = /dev/tor/50               Second pseudo-channel
2668                    ...
2669
2670197 char        OpenTNF tracing facility
2671                  0 = /dev/tnf/t0               Trace 0 data extraction
2672                  1 = /dev/tnf/t1               Trace 1 data extraction
2673                    ...
2674                128 = /dev/tnf/status           Tracing facility status
2675                130 = /dev/tnf/trace            Tracing device
2676
2677198 char        Total Impact TPMP2 quad coprocessor PCI card
2678                  0 = /dev/tpmp2/0              First card
2679                  1 = /dev/tpmp2/1              Second card
2680                    ...
2681
2682199 char        Veritas volume manager (VxVM) volumes
2683                  0 = /dev/vx/rdsk/*/*          First volume
2684                  1 = /dev/vx/rdsk/*/*          Second volume
2685                    ...
2686
2687199 block       Veritas volume manager (VxVM) volumes
2688                  0 = /dev/vx/dsk/*/*           First volume
2689                  1 = /dev/vx/dsk/*/*           Second volume
2690                    ...
2691
2692                The namespace in these directories is maintained by
2693                the user space VxVM software.
2694
2695200 char        Veritas VxVM configuration interface
2696                  0 = /dev/vx/config            Configuration access node
2697                  1 = /dev/vx/trace             Volume i/o trace access node
2698                  2 = /dev/vx/iod               Volume i/o daemon access node
2699                  3 = /dev/vx/info              Volume information access node
2700                  4 = /dev/vx/task              Volume tasks access node
2701                  5 = /dev/vx/taskmon           Volume tasks monitor daemon
2702
2703201 char        Veritas VxVM dynamic multipathing driver
2704                  0 = /dev/vx/rdmp/*            First multipath device
2705                  1 = /dev/vx/rdmp/*            Second multipath device
2706                    ...
2707201 block       Veritas VxVM dynamic multipathing driver
2708                  0 = /dev/vx/dmp/*             First multipath device
2709                  1 = /dev/vx/dmp/*             Second multipath device
2710                    ...
2711
2712                The namespace in these directories is maintained by
2713                the user space VxVM software.
2714
2715202 char        CPU model-specific registers
2716                  0 = /dev/cpu/0/msr            MSRs on CPU 0
2717                  1 = /dev/cpu/1/msr            MSRs on CPU 1
2718                    ...
2719
2720202 block       Xen Virtual Block Device
2721                  0 = /dev/xvda       First Xen VBD whole disk
2722                  16 = /dev/xvdb      Second Xen VBD whole disk
2723                  32 = /dev/xvdc      Third Xen VBD whole disk
2724                    ...
2725                  240 = /dev/xvdp     Sixteenth Xen VBD whole disk
2726
2727                Partitions are handled in the same way as for IDE
2728                disks (see major number 3) except that the limit on
2729                partitions is 15.
2730
2731203 char        CPU CPUID information
2732                  0 = /dev/cpu/0/cpuid          CPUID on CPU 0
2733                  1 = /dev/cpu/1/cpuid          CPUID on CPU 1
2734                    ...
2735
2736204 char        Low-density serial ports
2737                  0 = /dev/ttyLU0               LinkUp Systems L72xx UART - port 0
2738                  1 = /dev/ttyLU1               LinkUp Systems L72xx UART - port 1
2739                  2 = /dev/ttyLU2               LinkUp Systems L72xx UART - port 2
2740                  3 = /dev/ttyLU3               LinkUp Systems L72xx UART - port 3
2741                  4 = /dev/ttyFB0               Intel Footbridge (ARM)
2742                  5 = /dev/ttySA0               StrongARM builtin serial port 0
2743                  6 = /dev/ttySA1               StrongARM builtin serial port 1
2744                  7 = /dev/ttySA2               StrongARM builtin serial port 2
2745                  8 = /dev/ttySC0               SCI serial port (SuperH) - port 0
2746                  9 = /dev/ttySC1               SCI serial port (SuperH) - port 1
2747                 10 = /dev/ttySC2               SCI serial port (SuperH) - port 2
2748                 11 = /dev/ttySC3               SCI serial port (SuperH) - port 3
2749                 12 = /dev/ttyFW0               Firmware console - port 0
2750                 13 = /dev/ttyFW1               Firmware console - port 1
2751                 14 = /dev/ttyFW2               Firmware console - port 2
2752                 15 = /dev/ttyFW3               Firmware console - port 3
2753                 16 = /dev/ttyAM0               ARM "AMBA" serial port 0
2754                    ...
2755                 31 = /dev/ttyAM15              ARM "AMBA" serial port 15
2756                 32 = /dev/ttyDB0               DataBooster serial port 0
2757                    ...
2758                 39 = /dev/ttyDB7               DataBooster serial port 7
2759                 40 = /dev/ttySG0               SGI Altix console port
2760                 41 = /dev/ttySMX0              Motorola i.MX - port 0
2761                 42 = /dev/ttySMX1              Motorola i.MX - port 1
2762                 43 = /dev/ttySMX2              Motorola i.MX - port 2
2763                 44 = /dev/ttyMM0               Marvell MPSC - port 0
2764                 45 = /dev/ttyMM1               Marvell MPSC - port 1
2765                 46 = /dev/ttyCPM0              PPC CPM (SCC or SMC) - port 0
2766                    ...
2767                 47 = /dev/ttyCPM5              PPC CPM (SCC or SMC) - port 5
2768                 50 = /dev/ttyIOC0              Altix serial card
2769                    ...
2770                 81 = /dev/ttyIOC31             Altix serial card
2771                 82 = /dev/ttyVR0               NEC VR4100 series SIU
2772                 83 = /dev/ttyVR1               NEC VR4100 series DSIU
2773                 84 = /dev/ttyIOC84             Altix ioc4 serial card
2774                    ...
2775                 115 = /dev/ttyIOC115           Altix ioc4 serial card
2776                 116 = /dev/ttySIOC0            Altix ioc3 serial card
2777                    ...
2778                 147 = /dev/ttySIOC31           Altix ioc3 serial card
2779                 148 = /dev/ttyPSC0             PPC PSC - port 0
2780                    ...
2781                 153 = /dev/ttyPSC5             PPC PSC - port 5
2782                 154 = /dev/ttyAT0              ATMEL serial port 0
2783                    ...
2784                 169 = /dev/ttyAT15             ATMEL serial port 15
2785                 170 = /dev/ttyNX0              Hilscher netX serial port 0
2786                    ...
2787                 185 = /dev/ttyNX15             Hilscher netX serial port 15
2788                 186 = /dev/ttyJ0               JTAG1 DCC protocol based serial port emulation
2789                 187 = /dev/ttyUL0              Xilinx uartlite - port 0
2790                    ...
2791                 190 = /dev/ttyUL3              Xilinx uartlite - port 3
2792                 191 = /dev/xvc0                Xen virtual console - port 0
2793                 192 = /dev/ttyPZ0              pmac_zilog - port 0
2794                    ...
2795                 195 = /dev/ttyPZ3              pmac_zilog - port 3
2796                 196 = /dev/ttyTX0              TX39/49 serial port 0
2797                    ...
2798                 204 = /dev/ttyTX7              TX39/49 serial port 7
2799                 205 = /dev/ttySC0              SC26xx serial port 0
2800                 206 = /dev/ttySC1              SC26xx serial port 1
2801                 207 = /dev/ttySC2              SC26xx serial port 2
2802                 208 = /dev/ttySC3              SC26xx serial port 3
2803                 209 = /dev/ttyMAX0             MAX3100 serial port 0
2804                 210 = /dev/ttyMAX1             MAX3100 serial port 1
2805                 211 = /dev/ttyMAX2             MAX3100 serial port 2
2806                 212 = /dev/ttyMAX3             MAX3100 serial port 3
2807
2808205 char        Low-density serial ports (alternate device)
2809                  0 = /dev/culu0                Callout device for ttyLU0
2810                  1 = /dev/culu1                Callout device for ttyLU1
2811                  2 = /dev/culu2                Callout device for ttyLU2
2812                  3 = /dev/culu3                Callout device for ttyLU3
2813                  4 = /dev/cufb0                Callout device for ttyFB0
2814                  5 = /dev/cusa0                Callout device for ttySA0
2815                  6 = /dev/cusa1                Callout device for ttySA1
2816                  7 = /dev/cusa2                Callout device for ttySA2
2817                  8 = /dev/cusc0                Callout device for ttySC0
2818                  9 = /dev/cusc1                Callout device for ttySC1
2819                 10 = /dev/cusc2                Callout device for ttySC2
2820                 11 = /dev/cusc3                Callout device for ttySC3
2821                 12 = /dev/cufw0                Callout device for ttyFW0
2822                 13 = /dev/cufw1                Callout device for ttyFW1
2823                 14 = /dev/cufw2                Callout device for ttyFW2
2824                 15 = /dev/cufw3                Callout device for ttyFW3
2825                 16 = /dev/cuam0                Callout device for ttyAM0
2826                    ...
2827                 31 = /dev/cuam15               Callout device for ttyAM15
2828                 32 = /dev/cudb0                Callout device for ttyDB0
2829                    ...
2830                 39 = /dev/cudb7                Callout device for ttyDB7
2831                 40 = /dev/cusg0                Callout device for ttySG0
2832                 41 = /dev/ttycusmx0            Callout device for ttySMX0
2833                 42 = /dev/ttycusmx1            Callout device for ttySMX1
2834                 43 = /dev/ttycusmx2            Callout device for ttySMX2
2835                 46 = /dev/cucpm0               Callout device for ttyCPM0
2836                    ...
2837                 49 = /dev/cucpm5               Callout device for ttyCPM5
2838                 50 = /dev/cuioc40              Callout device for ttyIOC40
2839                    ...
2840                 81 = /dev/cuioc431             Callout device for ttyIOC431
2841                 82 = /dev/cuvr0                Callout device for ttyVR0
2842                 83 = /dev/cuvr1                Callout device for ttyVR1
2843
2844206 char        OnStream SC-x0 tape devices
2845                  0 = /dev/osst0                First OnStream SCSI tape, mode 0
2846                  1 = /dev/osst1                Second OnStream SCSI tape, mode 0
2847                    ...
2848                 32 = /dev/osst0l               First OnStream SCSI tape, mode 1
2849                 33 = /dev/osst1l               Second OnStream SCSI tape, mode 1
2850                    ...
2851                 64 = /dev/osst0m               First OnStream SCSI tape, mode 2
2852                 65 = /dev/osst1m               Second OnStream SCSI tape, mode 2
2853                    ...
2854                 96 = /dev/osst0a               First OnStream SCSI tape, mode 3
2855                 97 = /dev/osst1a               Second OnStream SCSI tape, mode 3
2856                    ...
2857                128 = /dev/nosst0               No rewind version of /dev/osst0
2858                129 = /dev/nosst1               No rewind version of /dev/osst1
2859                    ...
2860                160 = /dev/nosst0l              No rewind version of /dev/osst0l
2861                161 = /dev/nosst1l              No rewind version of /dev/osst1l
2862                    ...
2863                192 = /dev/nosst0m              No rewind version of /dev/osst0m
2864                193 = /dev/nosst1m              No rewind version of /dev/osst1m
2865                    ...
2866                224 = /dev/nosst0a              No rewind version of /dev/osst0a
2867                225 = /dev/nosst1a              No rewind version of /dev/osst1a
2868                    ...
2869
2870                The OnStream SC-x0 SCSI tapes do not support the
2871                standard SCSI SASD command set and therefore need
2872                their own driver "osst". Note that the IDE, USB (and
2873                maybe ParPort) versions may be driven via ide-scsi or
2874                usb-storage SCSI emulation and this osst device and
2875                driver as well.  The ADR-x0 drives are QIC-157
2876                compliant and don't need osst.
2877
2878207 char        Compaq ProLiant health feature indicate
2879                  0 = /dev/cpqhealth/cpqw       Redirector interface
2880                  1 = /dev/cpqhealth/crom       EISA CROM
2881                  2 = /dev/cpqhealth/cdt        Data Table
2882                  3 = /dev/cpqhealth/cevt       Event Log
2883                  4 = /dev/cpqhealth/casr       Automatic Server Recovery
2884                  5 = /dev/cpqhealth/cecc       ECC Memory
2885                  6 = /dev/cpqhealth/cmca       Machine Check Architecture
2886                  7 = /dev/cpqhealth/ccsm       Deprecated CDT
2887                  8 = /dev/cpqhealth/cnmi       NMI Handling
2888                  9 = /dev/cpqhealth/css        Sideshow Management
2889                 10 = /dev/cpqhealth/cram       CMOS interface
2890                 11 = /dev/cpqhealth/cpci       PCI IRQ interface
2891
2892208 char        User space serial ports
2893                  0 = /dev/ttyU0                First user space serial port
2894                  1 = /dev/ttyU1                Second user space serial port
2895                    ...
2896
2897209 char        User space serial ports (alternate devices)
2898                  0 = /dev/cuu0                 Callout device for ttyU0
2899                  1 = /dev/cuu1                 Callout device for ttyU1
2900                    ...
2901
2902210 char        SBE, Inc. sync/async serial card
2903                  0 = /dev/sbei/wxcfg0          Configuration device for board 0
2904                  1 = /dev/sbei/dld0            Download device for board 0
2905                  2 = /dev/sbei/wan00           WAN device, port 0, board 0
2906                  3 = /dev/sbei/wan01           WAN device, port 1, board 0
2907                  4 = /dev/sbei/wan02           WAN device, port 2, board 0
2908                  5 = /dev/sbei/wan03           WAN device, port 3, board 0
2909                  6 = /dev/sbei/wanc00          WAN clone device, port 0, board 0
2910                  7 = /dev/sbei/wanc01          WAN clone device, port 1, board 0
2911                  8 = /dev/sbei/wanc02          WAN clone device, port 2, board 0
2912                  9 = /dev/sbei/wanc03          WAN clone device, port 3, board 0
2913                 10 = /dev/sbei/wxcfg1          Configuration device for board 1
2914                 11 = /dev/sbei/dld1            Download device for board 1
2915                 12 = /dev/sbei/wan10           WAN device, port 0, board 1
2916                 13 = /dev/sbei/wan11           WAN device, port 1, board 1
2917                 14 = /dev/sbei/wan12           WAN device, port 2, board 1
2918                 15 = /dev/sbei/wan13           WAN device, port 3, board 1
2919                 16 = /dev/sbei/wanc10          WAN clone device, port 0, board 1
2920                 17 = /dev/sbei/wanc11          WAN clone device, port 1, board 1
2921                 18 = /dev/sbei/wanc12          WAN clone device, port 2, board 1
2922                 19 = /dev/sbei/wanc13          WAN clone device, port 3, board 1
2923                    ...
2924
2925                Yes, each board is really spaced 10 (decimal) apart.
2926
2927211 char        Addinum CPCI1500 digital I/O card
2928                  0 = /dev/addinum/cpci1500/0   First CPCI1500 card
2929                  1 = /dev/addinum/cpci1500/1   Second CPCI1500 card
2930                    ...
2931
2932212 char        LinuxTV.org DVB driver subsystem
2933                  0 = /dev/dvb/adapter0/video0    first video decoder of first card
2934                  1 = /dev/dvb/adapter0/audio0    first audio decoder of first card
2935                  2 = /dev/dvb/adapter0/sec0      (obsolete/unused)
2936                  3 = /dev/dvb/adapter0/frontend0 first frontend device of first card
2937                  4 = /dev/dvb/adapter0/demux0    first demux device of first card
2938                  5 = /dev/dvb/adapter0/dvr0      first digital video recoder device of first card
2939                  6 = /dev/dvb/adapter0/ca0       first common access port of first card
2940                  7 = /dev/dvb/adapter0/net0      first network device of first card
2941                  8 = /dev/dvb/adapter0/osd0      first on-screen-display device of first card
2942                  9 = /dev/dvb/adapter0/video1    second video decoder of first card
2943                    ...
2944                 64 = /dev/dvb/adapter1/video0    first video decoder of second card
2945                    ...
2946                128 = /dev/dvb/adapter2/video0    first video decoder of third card
2947                    ...
2948                196 = /dev/dvb/adapter3/video0    first video decoder of fourth card
2949
2950216 char        Bluetooth RFCOMM TTY devices
2951                  0 = /dev/rfcomm0              First Bluetooth RFCOMM TTY device
2952                  1 = /dev/rfcomm1              Second Bluetooth RFCOMM TTY device
2953                    ...
2954
2955217 char        Bluetooth RFCOMM TTY devices (alternate devices)
2956                  0 = /dev/curf0                Callout device for rfcomm0
2957                  1 = /dev/curf1                Callout device for rfcomm1
2958                    ...
2959
2960218 char        The Logical Company bus Unibus/Qbus adapters
2961                  0 = /dev/logicalco/bci/0      First bus adapter
2962                  1 = /dev/logicalco/bci/1      First bus adapter
2963                    ...
2964
2965219 char        The Logical Company DCI-1300 digital I/O card
2966                  0 = /dev/logicalco/dci1300/0  First DCI-1300 card
2967                  1 = /dev/logicalco/dci1300/1  Second DCI-1300 card
2968                    ...
2969
2970220 char        Myricom Myrinet "GM" board
2971                  0 = /dev/myricom/gm0          First Myrinet GM board
2972                  1 = /dev/myricom/gmp0         First board "root access"
2973                  2 = /dev/myricom/gm1          Second Myrinet GM board
2974                  3 = /dev/myricom/gmp1         Second board "root access"
2975                    ...
2976
2977221 char        VME bus
2978                  0 = /dev/bus/vme/m0           First master image
2979                  1 = /dev/bus/vme/m1           Second master image
2980                  2 = /dev/bus/vme/m2           Third master image
2981                  3 = /dev/bus/vme/m3           Fourth master image
2982                  4 = /dev/bus/vme/s0           First slave image
2983                  5 = /dev/bus/vme/s1           Second slave image
2984                  6 = /dev/bus/vme/s2           Third slave image
2985                  7 = /dev/bus/vme/s3           Fourth slave image
2986                  8 = /dev/bus/vme/ctl          Control
2987
2988                It is expected that all VME bus drivers will use the
2989                same interface.  For interface documentation see
2990                http://www.vmelinux.org/.
2991
2992224 char        A2232 serial card
2993                  0 = /dev/ttyY0                First A2232 port
2994                  1 = /dev/ttyY1                Second A2232 port
2995                    ...
2996
2997225 char        A2232 serial card (alternate devices)
2998                  0 = /dev/cuy0                 Callout device for ttyY0
2999                  1 = /dev/cuy1                 Callout device for ttyY1
3000                    ...
3001
3002226 char        Direct Rendering Infrastructure (DRI)
3003                  0 = /dev/dri/card0            First graphics card
3004                  1 = /dev/dri/card1            Second graphics card
3005                    ...
3006
3007227 char        IBM 3270 terminal Unix tty access
3008                  1 = /dev/3270/tty1            First 3270 terminal
3009                  2 = /dev/3270/tty2            Seconds 3270 terminal
3010                    ...
3011
3012228 char        IBM 3270 terminal block-mode access
3013                  0 = /dev/3270/tub             Controlling interface
3014                  1 = /dev/3270/tub1            First 3270 terminal
3015                  2 = /dev/3270/tub2            Second 3270 terminal
3016                    ...
3017
3018229 char        IBM iSeries/pSeries virtual console
3019                  0 = /dev/hvc0                 First console port
3020                  1 = /dev/hvc1                 Second console port
3021                    ...
3022
3023230 char        IBM iSeries virtual tape
3024                  0 = /dev/iseries/vt0          First virtual tape, mode 0
3025                  1 = /dev/iseries/vt1          Second virtual tape, mode 0
3026                    ...
3027                 32 = /dev/iseries/vt0l         First virtual tape, mode 1
3028                 33 = /dev/iseries/vt1l         Second virtual tape, mode 1
3029                    ...
3030                 64 = /dev/iseries/vt0m         First virtual tape, mode 2
3031                 65 = /dev/iseries/vt1m         Second virtual tape, mode 2
3032                    ...
3033                 96 = /dev/iseries/vt0a         First virtual tape, mode 3
3034                 97 = /dev/iseries/vt1a         Second virtual tape, mode 3
3035                      ...
3036                128 = /dev/iseries/nvt0         First virtual tape, mode 0, no rewind
3037                129 = /dev/iseries/nvt1         Second virtual tape, mode 0, no rewind
3038                    ...
3039                160 = /dev/iseries/nvt0l        First virtual tape, mode 1, no rewind
3040                161 = /dev/iseries/nvt1l        Second virtual tape, mode 1, no rewind
3041                    ...
3042                192 = /dev/iseries/nvt0m        First virtual tape, mode 2, no rewind
3043                193 = /dev/iseries/nvt1m        Second virtual tape, mode 2, no rewind
3044                    ...
3045                224 = /dev/iseries/nvt0a        First virtual tape, mode 3, no rewind
3046                225 = /dev/iseries/nvt1a        Second virtual tape, mode 3, no rewind
3047                    ...
3048
3049                "No rewind" refers to the omission of the default
3050                automatic rewind on device close.  The MTREW or MTOFFL
3051                ioctl()'s can be used to rewind the tape regardless of
3052                the device used to access it.
3053
3054231 char        InfiniBand
3055                0 = /dev/infiniband/umad0
3056                1 = /dev/infiniband/umad1
3057                  ...
3058                63 = /dev/infiniband/umad63    63rd InfiniBandMad device
3059                64 = /dev/infiniband/issm0     First InfiniBand IsSM device
3060                65 = /dev/infiniband/issm1     Second InfiniBand IsSM device
3061                  ...
3062                127 = /dev/infiniband/issm63    63rd InfiniBand IsSM device
3063                128 = /dev/infiniband/uverbs0   First InfiniBand verbs device
3064                129 = /dev/infiniband/uverbs1   Second InfiniBand verbs device
3065                  ...
3066                159 = /dev/infiniband/uverbs31  31st InfiniBand verbs device
3067
3068232 char        Biometric Devices
3069                0 = /dev/biometric/sensor0/fingerprint  first fingerprint sensor on first device
3070                1 = /dev/biometric/sensor0/iris         first iris sensor on first device
3071                2 = /dev/biometric/sensor0/retina       first retina sensor on first device
3072                3 = /dev/biometric/sensor0/voiceprint   first voiceprint sensor on first device
3073                4 = /dev/biometric/sensor0/facial       first facial sensor on first device
3074                5 = /dev/biometric/sensor0/hand         first hand sensor on first device
3075                  ...
3076                10 = /dev/biometric/sensor1/fingerprint first fingerprint sensor on second device
3077                  ...
3078                20 = /dev/biometric/sensor2/fingerprint first fingerprint sensor on third device
3079                  ...
3080
3081233 char        PathScale InfiniPath interconnect
3082                0 = /dev/ipath        Primary device for programs (any unit)
3083                1 = /dev/ipath0       Access specifically to unit 0
3084                2 = /dev/ipath1       Access specifically to unit 1
3085                  ...
3086                4 = /dev/ipath3       Access specifically to unit 3
3087                129 = /dev/ipath_sma    Device used by Subnet Management Agent
3088                130 = /dev/ipath_diag   Device used by diagnostics programs
3089
3090234-239         UNASSIGNED
3091
3092240-254 char    LOCAL/EXPERIMENTAL USE
3093
3094240-254 block   LOCAL/EXPERIMENTAL USE
3095                Allocated for local/experimental use.  For devices not
3096                assigned official numbers, these ranges should be
3097                used in order to avoid conflicting with future assignments.
3098
3099255 char        RESERVED
3100
3101255 block       RESERVED
3102
3103                This major is reserved to assist the expansion to a
3104                larger number space.  No device nodes with this major
3105                should ever be created on the filesystem.
3106                (This is probably not true anymore, but I'll leave it
3107                for now /Torben)
3108
3109---LARGE MAJORS!!!!!---
3110
3111256 char        Equinox SST multi-port serial boards
3112                   0 = /dev/ttyEQ0      First serial port on first Equinox SST board
3113                 127 = /dev/ttyEQ127    Last serial port on first Equinox SST board
3114                 128 = /dev/ttyEQ128    First serial port on second Equinox SST board
3115                  ...
3116                1027 = /dev/ttyEQ1027   Last serial port on eighth Equinox SST board
3117
3118256 block       Resident Flash Disk Flash Translation Layer
3119                  0 = /dev/rfda         First RFD FTL layer
3120                 16 = /dev/rfdb         Second RFD FTL layer
3121                  ...
3122                240 = /dev/rfdp         16th RFD FTL layer
3123
3124257 char        Phoenix Technologies Cryptographic Services Driver
3125                  0 = /dev/ptlsec       Crypto Services Driver
3126
3127257 block       SSFDC Flash Translation Layer filesystem
3128                  0 = /dev/ssfdca       First SSFDC layer
3129                  8 = /dev/ssfdcb       Second SSFDC layer
3130                 16 = /dev/ssfdcc       Third SSFDC layer
3131                 24 = /dev/ssfdcd       4th SSFDC layer
3132                 32 = /dev/ssfdce       5th SSFDC layer
3133                 40 = /dev/ssfdcf       6th SSFDC layer
3134                 48 = /dev/ssfdcg       7th SSFDC layer
3135                 56 = /dev/ssfdch       8th SSFDC layer
3136
3137258 block       ROM/Flash read-only translation layer
3138                  0 = /dev/blockrom0    First ROM card's translation layer interface
3139                  1 = /dev/blockrom1    Second ROM card's translation layer interface
3140                  ...
3141
3142259 block       Block Extended Major
3143                  Used dynamically to hold additional partition minor
3144                  numbers and allow large numbers of partitions per device
3145
3146259 char        FPGA configuration interfaces
3147                  0 = /dev/icap0        First Xilinx internal configuration
3148                  1 = /dev/icap1        Second Xilinx internal configuration
3149
3150260 char        OSD (Object-based-device) SCSI Device
3151                  0 = /dev/osd0         First OSD Device
3152                  1 = /dev/osd1         Second OSD Device
3153                  ...
3154                  255 = /dev/osd255     256th OSD Device
3155
3156 ****   ADDITIONAL /dev DIRECTORY ENTRIES
3157
3158This section details additional entries that should or may exist in
3159the /dev directory.  It is preferred that symbolic links use the same
3160form (absolute or relative) as is indicated here.  Links are
3161classified as "hard" or "symbolic" depending on the preferred type of
3162link; if possible, the indicated type of link should be used.
3163
3164
3165        Compulsory links
3166
3167These links should exist on all systems:
3168
3169/dev/fd         /proc/self/fd   symbolic        File descriptors
3170/dev/stdin      fd/0            symbolic        stdin file descriptor
3171/dev/stdout     fd/1            symbolic        stdout file descriptor
3172/dev/stderr     fd/2            symbolic        stderr file descriptor
3173/dev/nfsd       socksys         symbolic        Required by iBCS-2
3174/dev/X0R        null            symbolic        Required by iBCS-2
3175
3176Note: /dev/X0R is <letter X>-<digit 0>-<letter R>.
3177
3178        Recommended links
3179
3180It is recommended that these links exist on all systems:
3181
3182/dev/core       /proc/kcore     symbolic        Backward compatibility
3183/dev/ramdisk    ram0            symbolic        Backward compatibility
3184/dev/ftape      qft0            symbolic        Backward compatibility
3185/dev/bttv0      video0          symbolic        Backward compatibility
3186/dev/radio      radio0          symbolic        Backward compatibility
3187/dev/i2o*       /dev/i2o/*      symbolic        Backward compatibility
3188/dev/scd?       sr?             hard            Alternate SCSI CD-ROM name
3189
3190        Locally defined links
3191
3192The following links may be established locally to conform to the
3193configuration of the system.  This is merely a tabulation of existing
3194practice, and does not constitute a recommendation.  However, if they
3195exist, they should have the following uses.
3196
3197/dev/mouse      mouse port      symbolic        Current mouse device
3198/dev/tape       tape device     symbolic        Current tape device
3199/dev/cdrom      CD-ROM device   symbolic        Current CD-ROM device
3200/dev/cdwriter   CD-writer       symbolic        Current CD-writer device
3201/dev/scanner    scanner         symbolic        Current scanner device
3202/dev/modem      modem port      symbolic        Current dialout device
3203/dev/root       root device     symbolic        Current root filesystem
3204/dev/swap       swap device     symbolic        Current swap device
3205
3206/dev/modem should not be used for a modem which supports dialin as
3207well as dialout, as it tends to cause lock file problems.  If it
3208exists, /dev/modem should point to the appropriate primary TTY device
3209(the use of the alternate callout devices is deprecated).
3210
3211For SCSI devices, /dev/tape and /dev/cdrom should point to the
3212``cooked'' devices (/dev/st* and /dev/sr*, respectively), whereas
3213/dev/cdwriter and /dev/scanner should point to the appropriate generic
3214SCSI devices (/dev/sg*).
3215
3216/dev/mouse may point to a primary serial TTY device, a hardware mouse
3217device, or a socket for a mouse driver program (e.g. /dev/gpmdata).
3218
3219        Sockets and pipes
3220
3221Non-transient sockets and named pipes may exist in /dev.  Common entries are:
3222
3223/dev/printer    socket          lpd local socket
3224/dev/log        socket          syslog local socket
3225/dev/gpmdata    socket          gpm mouse multiplexer
3226
3227        Mount points
3228
3229The following names are reserved for mounting special filesystems
3230under /dev.  These special filesystems provide kernel interfaces that
3231cannot be provided with standard device nodes.
3232
3233/dev/pts        devpts          PTY slave filesystem
3234/dev/shm        tmpfs           POSIX shared memory maintenance access
3235
3236 ****   TERMINAL DEVICES
3237
3238Terminal, or TTY devices are a special class of character devices.  A
3239terminal device is any device that could act as a controlling terminal
3240for a session; this includes virtual consoles, serial ports, and
3241pseudoterminals (PTYs).
3242
3243All terminal devices share a common set of capabilities known as line
3244disciplines; these include the common terminal line discipline as well
3245as SLIP and PPP modes.
3246
3247All terminal devices are named similarly; this section explains the
3248naming and use of the various types of TTYs.  Note that the naming
3249conventions include several historical warts; some of these are
3250Linux-specific, some were inherited from other systems, and some
3251reflect Linux outgrowing a borrowed convention.
3252
3253A hash mark (#) in a device name is used here to indicate a decimal
3254number without leading zeroes.
3255
3256        Virtual consoles and the console device
3257
3258Virtual consoles are full-screen terminal displays on the system video
3259monitor.  Virtual consoles are named /dev/tty#, with numbering
3260starting at /dev/tty1; /dev/tty0 is the current virtual console.
3261/dev/tty0 is the device that should be used to access the system video
3262card on those architectures for which the frame buffer devices
3263(/dev/fb*) are not applicable.  Do not use /dev/console
3264for this purpose.
3265
3266The console device, /dev/console, is the device to which system
3267messages should be sent, and on which logins should be permitted in
3268single-user mode.  Starting with Linux 2.1.71, /dev/console is managed
3269by the kernel; for previous versions it should be a symbolic link to
3270either /dev/tty0, a specific virtual console such as /dev/tty1, or to
3271a serial port primary (tty*, not cu*) device, depending on the
3272configuration of the system.
3273
3274        Serial ports
3275
3276Serial ports are RS-232 serial ports and any device which simulates
3277one, either in hardware (such as internal modems) or in software (such
3278as the ISDN driver.)  Under Linux, each serial ports has two device
3279names, the primary or callin device and the alternate or callout one.
3280Each kind of device is indicated by a different letter.  For any
3281letter X, the names of the devices are /dev/ttyX# and /dev/cux#,
3282respectively; for historical reasons, /dev/ttyS# and /dev/ttyC#
3283correspond to /dev/cua# and /dev/cub#.  In the future, it should be
3284expected that multiple letters will be used; all letters will be upper
3285case for the "tty" device (e.g. /dev/ttyDP#) and lower case for the
3286"cu" device (e.g. /dev/cudp#).
3287
3288The names /dev/ttyQ# and /dev/cuq# are reserved for local use.
3289
3290The alternate devices provide for kernel-based exclusion and somewhat
3291different defaults than the primary devices.  Their main purpose is to
3292allow the use of serial ports with programs with no inherent or broken
3293support for serial ports.  Their use is deprecated, and they may be
3294removed from a future version of Linux.
3295
3296Arbitration of serial ports is provided by the use of lock files with
3297the names /var/lock/LCK..ttyX#.  The contents of the lock file should
3298be the PID of the locking process as an ASCII number.
3299
3300It is common practice to install links such as /dev/modem
3301which point to serial ports.  In order to ensure proper locking in the
3302presence of these links, it is recommended that software chase
3303symlinks and lock all possible names; additionally, it is recommended
3304that a lock file be installed with the corresponding alternate
3305device.  In order to avoid deadlocks, it is recommended that the locks
3306are acquired in the following order, and released in the reverse:
3307
3308        1. The symbolic link name, if any (/var/lock/LCK..modem)
3309        2. The "tty" name (/var/lock/LCK..ttyS2)
3310        3. The alternate device name (/var/lock/LCK..cua2)
3311
3312In the case of nested symbolic links, the lock files should be
3313installed in the order the symlinks are resolved.
3314
3315Under no circumstances should an application hold a lock while waiting
3316for another to be released.  In addition, applications which attempt
3317to create lock files for the corresponding alternate device names
3318should take into account the possibility of being used on a non-serial
3319port TTY, for which no alternate device would exist.
3320
3321        Pseudoterminals (PTYs)
3322
3323Pseudoterminals, or PTYs, are used to create login sessions or provide
3324other capabilities requiring a TTY line discipline (including SLIP or
3325PPP capability) to arbitrary data-generation processes.  Each PTY has
3326a master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named
3327/dev/tty[p-za-e][0-9a-f].  The kernel arbitrates the use of PTYs by
3328allowing each master side to be opened only once.
3329
3330Once the master side has been opened, the corresponding slave device
3331can be used in the same manner as any TTY device.  The master and
3332slave devices are connected by the kernel, generating the equivalent
3333of a bidirectional pipe with TTY capabilities.
3334
3335Recent versions of the Linux kernels and GNU libc contain support for
3336the System V/Unix98 naming scheme for PTYs, which assigns a common
3337device, /dev/ptmx, to all the masters (opening it will automatically
3338give you a previously unassigned PTY) and a subdirectory, /dev/pts,
3339for the slaves; the slaves are named with decimal integers (/dev/pts/#
3340in our notation).  This removes the problem of exhausting the
3341namespace and enables the kernel to automatically create the device
3342nodes for the slaves on demand using the "devpts" filesystem.
3343
3344
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