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  17The LaTeX version of this document is no longer maintained.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  26The symbol {2.6} means the allocation is obsolete and scheduled for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
 102                 12 = /dev/oldmem       Used by crashdump kernels to access
 103                                        the memory of the kernel that crashed.
 104
 105  1 block       RAM disk
 106                  0 = /dev/ram0         First RAM disk
 107                  1 = /dev/ram1         Second RAM disk
 108                    ...
 109                250 = /dev/initrd       Initial RAM disk
 110
 111                Older kernels had /dev/ramdisk (1, 1) here.
 112                /dev/initrd refers to a RAM disk which was preloaded
 113                by the boot loader; newer kernels use /dev/ram0 for
 114                the initrd.
 115
 116  2 char        Pseudo-TTY masters
 117                  0 = /dev/ptyp0        First PTY master
 118                  1 = /dev/ptyp1        Second PTY master
 119                    ...
 120                255 = /dev/ptyef        256th PTY master
 121
 122                Pseudo-tty's are named as follows:
 123                * Masters are "pty", slaves are "tty";
 124                * the fourth letter is one of pqrstuvwxyzabcde indicating
 125                  the 1st through 16th series of 16 pseudo-ttys each, and
 126                * the fifth letter is one of 0123456789abcdef indicating
 127                  the position within the series.
 128
 129                These are the old-style (BSD) PTY devices; Unix98
 130                devices are on major 128 and above and use the PTY
 131                master multiplex (/dev/ptmx) to acquire a PTY on
 132                demand.
 133
 134  2 block       Floppy disks
 135                  0 = /dev/fd0          Controller 0, drive 0, autodetect
 136                  1 = /dev/fd1          Controller 0, drive 1, autodetect
 137                  2 = /dev/fd2          Controller 0, drive 2, autodetect
 138                  3 = /dev/fd3          Controller 0, drive 3, autodetect
 139                128 = /dev/fd4          Controller 1, drive 0, autodetect
 140                129 = /dev/fd5          Controller 1, drive 1, autodetect
 141                130 = /dev/fd6          Controller 1, drive 2, autodetect
 142                131 = /dev/fd7          Controller 1, drive 3, autodetect
 143
 144                To specify format, add to the autodetect device number:
 145                  0 = /dev/fd?          Autodetect format
 146                  4 = /dev/fd?d360      5.25"  360K in a 360K  drive(1)
 147                 20 = /dev/fd?h360      5.25"  360K in a 1200K drive(1)
 148                 48 = /dev/fd?h410      5.25"  410K in a 1200K drive
 149                 64 = /dev/fd?h420      5.25"  420K in a 1200K drive
 150                 24 = /dev/fd?h720      5.25"  720K in a 1200K drive
 151                 80 = /dev/fd?h880      5.25"  880K in a 1200K drive(1)
 152                  8 = /dev/fd?h1200     5.25" 1200K in a 1200K drive(1)
 153                 40 = /dev/fd?h1440     5.25" 1440K in a 1200K drive(1)
 154                 56 = /dev/fd?h1476     5.25" 1476K in a 1200K drive
 155                 72 = /dev/fd?h1494     5.25" 1494K in a 1200K drive
 156                 92 = /dev/fd?h1600     5.25" 1600K in a 1200K drive(1)
 157
 158                 12 = /dev/fd?u360      3.5"   360K Double Density(2)
 159                 16 = /dev/fd?u720      3.5"   720K Double Density(1)
 160                120 = /dev/fd?u800      3.5"   800K Double Density(2)
 161                 52 = /dev/fd?u820      3.5"   820K Double Density
 162                 68 = /dev/fd?u830      3.5"   830K Double Density
 163                 84 = /dev/fd?u1040     3.5"  1040K Double Density(1)
 164                 88 = /dev/fd?u1120     3.5"  1120K Double Density(1)
 165                 28 = /dev/fd?u1440     3.5"  1440K High Density(1)
 166                124 = /dev/fd?u1600     3.5"  1600K High Density(1)
 167                 44 = /dev/fd?u1680     3.5"  1680K High Density(3)
 168                 60 = /dev/fd?u1722     3.5"  1722K High Density
 169                 76 = /dev/fd?u1743     3.5"  1743K High Density
 170                 96 = /dev/fd?u1760     3.5"  1760K High Density
 171                116 = /dev/fd?u1840     3.5"  1840K High Density(3)
 172                100 = /dev/fd?u1920     3.5"  1920K High Density(1)
 173                 32 = /dev/fd?u2880     3.5"  2880K Extra Density(1)
 174                104 = /dev/fd?u3200     3.5"  3200K Extra Density
 175                108 = /dev/fd?u3520     3.5"  3520K Extra Density
 176                112 = /dev/fd?u3840     3.5"  3840K Extra Density(1)
 177
 178                 36 = /dev/fd?CompaQ    Compaq 2880K drive; obsolete?
 179
 180                (1) Autodetectable format
 181                (2) Autodetectable format in a Double Density (720K) drive only
 182                (3) Autodetectable format in a High Density (1440K) drive only
 183
 184                NOTE: The letter in the device name (d, q, h or u)
 185                signifies the type of drive: 5.25" Double Density (d),
 186                5.25" Quad Density (q), 5.25" High Density (h) or 3.5"
 187                (any model, u).  The use of the capital letters D, H
 188                and E for the 3.5" models have been deprecated, since
 189                the drive type is insignificant for these devices.
 190
 191  3 char        Pseudo-TTY slaves
 192                  0 = /dev/ttyp0        First PTY slave
 193                  1 = /dev/ttyp1        Second PTY slave
 194                    ...
 195                255 = /dev/ttyef        256th PTY slave
 196
 197                These are the old-style (BSD) PTY devices; Unix98
 198                devices are on major 136 and above.
 199
 200  3 block       First MFM, RLL and IDE hard disk/CD-ROM interface
 201                  0 = /dev/hda          Master: whole disk (or CD-ROM)
 202                 64 = /dev/hdb          Slave: whole disk (or CD-ROM)
 203
 204                For partitions, add to the whole disk device number:
 205                  0 = /dev/hd?          Whole disk
 206                  1 = /dev/hd?1         First partition
 207                  2 = /dev/hd?2         Second partition
 208                    ...
 209                 63 = /dev/hd?63        63rd partition
 210
 211                For Linux/i386, partitions 1-4 are the primary
 212                partitions, and 5 and above are logical partitions.
 213                Other versions of Linux use partitioning schemes
 214                appropriate to their respective architectures.
 215
 216  4 char        TTY devices
 217                  0 = /dev/tty0         Current virtual console
 218
 219                  1 = /dev/tty1         First virtual console
 220                    ...
 221                 63 = /dev/tty63        63rd virtual console
 222                 64 = /dev/ttyS0        First UART serial port
 223                    ...
 224                255 = /dev/ttyS191      192nd UART serial port
 225
 226                UART serial ports refer to 8250/16450/16550 series devices.
 227
 228                Older versions of the Linux kernel used this major
 229                number for BSD PTY devices.  As of Linux 2.1.115, this
 230                is no longer supported.  Use major numbers 2 and 3.
 231
 232  4 block       Aliases for dynamically allocated major devices to be used
 233                when its not possible to create the real device nodes
 234                because the root filesystem is mounted read-only.
 235
 236                  0 = /dev/root
 237
 238  5 char        Alternate TTY devices
 239                  0 = /dev/tty          Current TTY device
 240                  1 = /dev/console      System console
 241                  2 = /dev/ptmx         PTY master multiplex
 242                 64 = /dev/cua0         Callout device for ttyS0
 243                    ...
 244                255 = /dev/cua191       Callout device for ttyS191
 245
 246                (5,1) is /dev/console starting with Linux 2.1.71.  See
 247                the section on terminal devices for more information
 248                on /dev/console.
 249
 250  6 char        Parallel printer devices
 251                  0 = /dev/lp0          Parallel printer on parport0
 252                  1 = /dev/lp1          Parallel printer on parport1
 253                    ...
 254
 255                Current Linux kernels no longer have a fixed mapping
 256                between parallel ports and I/O addresses.  Instead,
 257                they are redirected through the parport multiplex layer.
 258
 259  7 char        Virtual console capture devices
 260                  0 = /dev/vcs          Current vc text contents
 261                  1 = /dev/vcs1         tty1 text contents
 262                    ...
 263                 63 = /dev/vcs63        tty63 text contents
 264                128 = /dev/vcsa         Current vc text/attribute contents
 265                129 = /dev/vcsa1        tty1 text/attribute contents
 266                    ...
 267                191 = /dev/vcsa63       tty63 text/attribute contents
 268
 269                NOTE: These devices permit both read and write access.
 270
 271  7 block       Loopback devices
 272                  0 = /dev/loop0        First loop device
 273                  1 = /dev/loop1        Second loop device
 274                    ...
 275
 276                The loop devices are used to mount filesystems not
 277                associated with block devices.  The binding to the
 278                loop devices is handled by mount(8) or losetup(8).
 279
 280  8 block       SCSI disk devices (0-15)
 281                  0 = /dev/sda          First SCSI disk whole disk
 282                 16 = /dev/sdb          Second SCSI disk whole disk
 283                 32 = /dev/sdc          Third SCSI disk whole disk
 284                    ...
 285                240 = /dev/sdp          Sixteenth SCSI disk whole disk
 286
 287                Partitions are handled in the same way as for IDE
 288                disks (see major number 3) except that the limit on
 289                partitions is 15.
 290
 291  9 char        SCSI tape devices
 292                  0 = /dev/st0          First SCSI tape, mode 0
 293                  1 = /dev/st1          Second SCSI tape, mode 0
 294                    ...
 295                 32 = /dev/st0l         First SCSI tape, mode 1
 296                 33 = /dev/st1l         Second SCSI tape, mode 1
 297                    ...
 298                 64 = /dev/st0m         First SCSI tape, mode 2
 299                 65 = /dev/st1m         Second SCSI tape, mode 2
 300                    ...
 301                 96 = /dev/st0a         First SCSI tape, mode 3
 302                 97 = /dev/st1a         Second SCSI tape, mode 3
 303                      ...
 304                128 = /dev/nst0         First SCSI tape, mode 0, no rewind
 305                129 = /dev/nst1         Second SCSI tape, mode 0, no rewind
 306                    ...
 307                160 = /dev/nst0l        First SCSI tape, mode 1, no rewind
 308                161 = /dev/nst1l        Second SCSI tape, mode 1, no rewind
 309                    ...
 310                192 = /dev/nst0m        First SCSI tape, mode 2, no rewind
 311                193 = /dev/nst1m        Second SCSI tape, mode 2, no rewind
 312                    ...
 313                224 = /dev/nst0a        First SCSI tape, mode 3, no rewind
 314                225 = /dev/nst1a        Second SCSI tape, mode 3, no rewind
 315                    ...
 316
 317                "No rewind" refers to the omission of the default
 318                automatic rewind on device close.  The MTREW or MTOFFL
 319                ioctl()'s can be used to rewind the tape regardless of
 320                the device used to access it.
 321
 322  9 block       Metadisk (RAID) devices
 323                  0 = /dev/md0          First metadisk group
 324                  1 = /dev/md1          Second metadisk group
 325                    ...
 326
 327                The metadisk driver is used to span a
 328                filesystem across multiple physical disks.
 329
 330 10 char        Non-serial mice, misc features
 331                  0 = /dev/logibm       Logitech bus mouse
 332                  1 = /dev/psaux        PS/2-style mouse port
 333                  2 = /dev/inportbm     Microsoft Inport bus mouse
 334                  3 = /dev/atibm        ATI XL bus mouse
 335                  4 = /dev/jbm          J-mouse
 336                  4 = /dev/amigamouse   Amiga mouse (68k/Amiga)
 337                  5 = /dev/atarimouse   Atari mouse
 338                  6 = /dev/sunmouse     Sun mouse
 339                  7 = /dev/amigamouse1  Second Amiga mouse
 340                  8 = /dev/smouse       Simple serial mouse driver
 341                  9 = /dev/pc110pad     IBM PC-110 digitizer pad
 342                 10 = /dev/adbmouse     Apple Desktop Bus mouse
 343                 11 = /dev/vrtpanel     Vr41xx embedded touch panel
 344                 13 = /dev/vpcmouse     Connectix Virtual PC Mouse
 345                 14 = /dev/touchscreen/ucb1x00  UCB 1x00 touchscreen
 346                 15 = /dev/touchscreen/mk712    MK712 touchscreen
 347                128 = /dev/beep         Fancy beep device
 348                129 =
 349                130 = /dev/watchdog     Watchdog timer port
 350                131 = /dev/temperature  Machine internal temperature
 351                132 = /dev/hwtrap       Hardware fault trap
 352                133 = /dev/exttrp       External device trap
 353                134 = /dev/apm_bios     Advanced Power Management BIOS
 354                135 = /dev/rtc          Real Time Clock
 355                139 = /dev/openprom     SPARC OpenBoot PROM
 356                140 = /dev/relay8       Berkshire Products Octal relay card
 357                141 = /dev/relay16      Berkshire Products ISO-16 relay card
 358                142 =
 359                143 = /dev/pciconf      PCI configuration space
 360                144 = /dev/nvram        Non-volatile configuration RAM
 361                145 = /dev/hfmodem      Soundcard shortwave modem control
 362                146 = /dev/graphics     Linux/SGI graphics device
 363                147 = /dev/opengl       Linux/SGI OpenGL pipe
 364                148 = /dev/gfx          Linux/SGI graphics effects device
 365                149 = /dev/input/mouse  Linux/SGI Irix emulation mouse
 366                150 = /dev/input/keyboard Linux/SGI Irix emulation keyboard
 367                151 = /dev/led          Front panel LEDs
 368                152 = /dev/kpoll        Kernel Poll Driver
 369                153 = /dev/mergemem     Memory merge device
 370                154 = /dev/pmu          Macintosh PowerBook power manager
 371                155 = /dev/isictl       MultiTech ISICom serial control
 372                156 = /dev/lcd          Front panel LCD display
 373                157 = /dev/ac           Applicom Intl Profibus card
 374                158 = /dev/nwbutton     Netwinder external button
 375                159 = /dev/nwdebug      Netwinder debug interface
 376                160 = /dev/nwflash      Netwinder flash memory
 377                161 = /dev/userdma      User-space DMA access
 378                162 = /dev/smbus        System Management Bus
 379                163 = /dev/lik          Logitech Internet Keyboard
 380                164 = /dev/ipmo         Intel Intelligent Platform Management
 381                165 = /dev/vmmon        VMWare virtual machine monitor
 382                166 = /dev/i2o/ctl      I2O configuration manager
 383                167 = /dev/specialix_sxctl Specialix serial control
 384                168 = /dev/tcldrv       Technology Concepts serial control
 385                169 = /dev/specialix_rioctl Specialix RIO serial control
 386                170 = /dev/thinkpad/thinkpad    IBM Thinkpad devices
 387                171 = /dev/srripc       QNX4 API IPC manager
 388                172 = /dev/usemaclone   Semaphore clone device
 389                173 = /dev/ipmikcs      Intelligent Platform Management
 390                174 = /dev/uctrl        SPARCbook 3 microcontroller
 391                175 = /dev/agpgart      AGP Graphics Address Remapping Table
 392                176 = /dev/gtrsc        Gorgy Timing radio clock
 393                177 = /dev/cbm          Serial CBM bus
 394                178 = /dev/jsflash      JavaStation OS flash SIMM
 395                179 = /dev/xsvc         High-speed shared-mem/semaphore service
 396                180 = /dev/vrbuttons    Vr41xx button input device
 397                181 = /dev/toshiba      Toshiba laptop SMM support
 398                182 = /dev/perfctr      Performance-monitoring counters
 399                183 = /dev/hwrng        Generic random number generator
 400                184 = /dev/cpu/microcode CPU microcode update interface
 401                186 = /dev/atomicps     Atomic shapshot of process state data
 402                187 = /dev/irnet        IrNET device
 403                188 = /dev/smbusbios    SMBus BIOS
 404                189 = /dev/ussp_ctl     User space serial port control
 405                190 = /dev/crash        Mission Critical Linux crash dump facility
 406                191 = /dev/pcl181       <information missing>
 407                192 = /dev/nas_xbus     NAS xbus LCD/buttons access
 408                193 = /dev/d7s          SPARC 7-segment display
 409                194 = /dev/zkshim       Zero-Knowledge network shim control
 410                195 = /dev/elographics/e2201    Elographics touchscreen E271-2201
 411                198 = /dev/sexec        Signed executable interface
 412                199 = /dev/scanners/cuecat :CueCat barcode scanner
 413                200 = /dev/net/tun      TAP/TUN network device
 414                201 = /dev/button/gulpb Transmeta GULP-B buttons
 415                202 = /dev/emd/ctl      Enhanced Metadisk RAID (EMD) control
 416                204 = /dev/video/em8300         EM8300 DVD decoder control
 417                205 = /dev/video/em8300_mv      EM8300 DVD decoder video
 418                206 = /dev/video/em8300_ma      EM8300 DVD decoder audio
 419                207 = /dev/video/em8300_sp      EM8300 DVD decoder subpicture
 420                208 = /dev/compaq/cpqphpc       Compaq PCI Hot Plug Controller
 421                209 = /dev/compaq/cpqrid        Compaq Remote Insight Driver
 422                210 = /dev/impi/bt      IMPI coprocessor block transfer
 423                211 = /dev/impi/smic    IMPI coprocessor stream interface
 424                212 = /dev/watchdogs/0  First watchdog device
 425                213 = /dev/watchdogs/1  Second watchdog device
 426                214 = /dev/watchdogs/2  Third watchdog device
 427                215 = /dev/watchdogs/3  Fourth watchdog device
 428                216 = /dev/fujitsu/apanel       Fujitsu/Siemens application panel
 429                217 = /dev/ni/natmotn           National Instruments Motion
 430                218 = /dev/kchuid       Inter-process chuid control
 431                219 = /dev/modems/mwave MWave modem firmware upload
 432                220 = /dev/mptctl       Message passing technology (MPT) control
 433                221 = /dev/mvista/hssdsi        Montavista PICMG hot swap system driver
 434                222 = /dev/mvista/hasi          Montavista PICMG high availability
 435                223 = /dev/input/uinput         User level driver support for input
 436                224 = /dev/tpm          TCPA TPM driver
 437                225 = /dev/pps          Pulse Per Second driver
 438                226 = /dev/systrace     Systrace device
 439                227 = /dev/mcelog       X86_64 Machine Check Exception driver
 440                228 = /dev/hpet         HPET driver
 441                229 = /dev/fuse         Fuse (virtual filesystem in user-space)
 442                230 = /dev/midishare    MidiShare driver
 443                231 = /dev/snapshot     System memory snapshot device
 444                232 = /dev/kvm          Kernel-based virtual machine (hardware virtualization extensions)
 445                233 = /dev/kmview       View-OS A process with a view
 446                240-254                 Reserved for local use
 447                255                     Reserved for MISC_DYNAMIC_MINOR
 448
 449 11 char        Raw keyboard device     (Linux/SPARC only)
 450                  0 = /dev/kbd          Raw keyboard device
 451
 452 11 char        Serial Mux device       (Linux/PA-RISC only)
 453                  0 = /dev/ttyB0        First mux port
 454                  1 = /dev/ttyB1        Second mux port
 455                    ...
 456
 457 11 block       SCSI CD-ROM devices
 458                  0 = /dev/scd0         First SCSI CD-ROM
 459                  1 = /dev/scd1         Second SCSI CD-ROM
 460                    ...
 461
 462                The prefix /dev/sr (instead of /dev/scd) has been deprecated.
 463
 464 12 char        QIC-02 tape
 465                  2 = /dev/ntpqic11     QIC-11, no rewind-on-close
 466                  3 = /dev/tpqic11      QIC-11, rewind-on-close
 467                  4 = /dev/ntpqic24     QIC-24, no rewind-on-close
 468                  5 = /dev/tpqic24      QIC-24, rewind-on-close
 469                  6 = /dev/ntpqic120    QIC-120, no rewind-on-close
 470                  7 = /dev/tpqic120     QIC-120, rewind-on-close
 471                  8 = /dev/ntpqic150    QIC-150, no rewind-on-close
 472                  9 = /dev/tpqic150     QIC-150, rewind-on-close
 473
 474                The device names specified are proposed -- if there
 475                are "standard" names for these devices, please let me know.
 476
 477 12 block
 478
 479 13 char        Input core
 480                  0 = /dev/input/js0    First joystick
 481                  1 = /dev/input/js1    Second joystick
 482                    ...
 483                 32 = /dev/input/mouse0 First mouse
 484                 33 = /dev/input/mouse1 Second mouse
 485                    ...
 486                 63 = /dev/input/mice   Unified mouse
 487                 64 = /dev/input/event0 First event queue
 488                 65 = /dev/input/event1 Second event queue
 489                    ...
 490
 491                Each device type has 5 bits (32 minors).
 492
 493 13 block       8-bit MFM/RLL/IDE controller
 494                  0 = /dev/xda          First XT disk whole disk
 495                 64 = /dev/xdb          Second XT disk whole disk
 496
 497                Partitions are handled in the same way as IDE disks
 498                (see major number 3).
 499
 500 14 char        Open Sound System (OSS)
 501                  0 = /dev/mixer        Mixer control
 502                  1 = /dev/sequencer    Audio sequencer
 503                  2 = /dev/midi00       First MIDI port
 504                  3 = /dev/dsp          Digital audio
 505                  4 = /dev/audio        Sun-compatible digital audio
 506                  6 =
 507                  7 = /dev/audioctl     SPARC audio control device
 508                  8 = /dev/sequencer2   Sequencer -- alternate device
 509                 16 = /dev/mixer1       Second soundcard mixer control
 510                 17 = /dev/patmgr0      Sequencer patch manager
 511                 18 = /dev/midi01       Second MIDI port
 512                 19 = /dev/dsp1         Second soundcard digital audio
 513                 20 = /dev/audio1       Second soundcard Sun digital audio
 514                 33 = /dev/patmgr1      Sequencer patch manager
 515                 34 = /dev/midi02       Third MIDI port
 516                 50 = /dev/midi03       Fourth MIDI port
 517
 518 14 block
 519
 520 15 char        Joystick
 521                  0 = /dev/js0          First analog joystick
 522                  1 = /dev/js1          Second analog joystick
 523                    ...
 524                128 = /dev/djs0         First digital joystick
 525                129 = /dev/djs1         Second digital joystick
 526                    ...
 527 15 block       Sony CDU-31A/CDU-33A CD-ROM
 528                  0 = /dev/sonycd       Sony CDU-31a CD-ROM
 529
 530 16 char        Non-SCSI scanners
 531                  0 = /dev/gs4500       Genius 4500 handheld scanner
 532
 533 16 block       GoldStar CD-ROM
 534                  0 = /dev/gscd         GoldStar CD-ROM
 535
 536 17 char        OBSOLETE (was Chase serial card)
 537                  0 = /dev/ttyH0        First Chase port
 538                  1 = /dev/ttyH1        Second Chase port
 539                    ...
 540 17 block       Optics Storage CD-ROM
 541                  0 = /dev/optcd        Optics Storage CD-ROM
 542
 543 18 char        OBSOLETE (was Chase serial card - alternate devices)
 544                  0 = /dev/cuh0         Callout device for ttyH0
 545                  1 = /dev/cuh1         Callout device for ttyH1
 546                    ...
 547 18 block       Sanyo CD-ROM
 548                  0 = /dev/sjcd         Sanyo CD-ROM
 549
 550 19 char        Cyclades serial card
 551                  0 = /dev/ttyC0        First Cyclades port
 552                    ...
 553                 31 = /dev/ttyC31       32nd Cyclades port
 554
 555 19 block       "Double" compressed disk
 556                  0 = /dev/double0      First compressed disk
 557                    ...
 558                  7 = /dev/double7      Eighth compressed disk
 559                128 = /dev/cdouble0     Mirror of first compressed disk
 560                    ...
 561                135 = /dev/cdouble7     Mirror of eighth compressed disk
 562
 563                See the Double documentation for the meaning of the
 564                mirror devices.
 565
 566 20 char        Cyclades serial card - alternate devices
 567                  0 = /dev/cub0         Callout device for ttyC0
 568                    ...
 569                 31 = /dev/cub31        Callout device for ttyC31
 570
 571 20 block       Hitachi CD-ROM (under development)
 572                  0 = /dev/hitcd        Hitachi CD-ROM
 573
 574 21 char        Generic SCSI access
 575                  0 = /dev/sg0          First generic SCSI device
 576                  1 = /dev/sg1          Second generic SCSI device
 577                    ...
 578
 579                Most distributions name these /dev/sga, /dev/sgb...;
 580                this sets an unnecessary limit of 26 SCSI devices in
 581                the system and is counter to standard Linux
 582                device-naming practice.
 583
 584 21 block       Acorn MFM hard drive interface
 585                  0 = /dev/mfma         First MFM drive whole disk
 586                 64 = /dev/mfmb         Second MFM drive whole disk
 587
 588                This device is used on the ARM-based Acorn RiscPC.
 589                Partitions are handled the same way as for IDE disks
 590                (see major number 3).
 591
 592 22 char        Digiboard serial card
 593                  0 = /dev/ttyD0        First Digiboard port
 594                  1 = /dev/ttyD1        Second Digiboard port
 595                    ...
 596 22 block       Second IDE hard disk/CD-ROM interface
 597                  0 = /dev/hdc          Master: whole disk (or CD-ROM)
 598                 64 = /dev/hdd          Slave: whole disk (or CD-ROM)
 599
 600                Partitions are handled the same way as for the first
 601                interface (see major number 3).
 602
 603 23 char        Digiboard serial card - alternate devices
 604                  0 = /dev/cud0         Callout device for ttyD0
 605                  1 = /dev/cud1         Callout device for ttyD1
 606                      ...
 607 23 block       Mitsumi proprietary CD-ROM
 608                  0 = /dev/mcd          Mitsumi CD-ROM
 609
 610 24 char        Stallion serial card
 611                  0 = /dev/ttyE0        Stallion port 0 card 0
 612                  1 = /dev/ttyE1        Stallion port 1 card 0
 613                    ...
 614                 64 = /dev/ttyE64       Stallion port 0 card 1
 615                 65 = /dev/ttyE65       Stallion port 1 card 1
 616                      ...
 617                128 = /dev/ttyE128      Stallion port 0 card 2
 618                129 = /dev/ttyE129      Stallion port 1 card 2
 619                    ...
 620                192 = /dev/ttyE192      Stallion port 0 card 3
 621                193 = /dev/ttyE193      Stallion port 1 card 3
 622                    ...
 623 24 block       Sony CDU-535 CD-ROM
 624                  0 = /dev/cdu535       Sony CDU-535 CD-ROM
 625
 626 25 char        Stallion serial card - alternate devices
 627                  0 = /dev/cue0         Callout device for ttyE0
 628                  1 = /dev/cue1         Callout device for ttyE1
 629                    ...
 630                 64 = /dev/cue64        Callout device for ttyE64
 631                 65 = /dev/cue65        Callout device for ttyE65
 632                    ...
 633                128 = /dev/cue128       Callout device for ttyE128
 634                129 = /dev/cue129       Callout device for ttyE129
 635                    ...
 636                192 = /dev/cue192       Callout device for ttyE192
 637                193 = /dev/cue193       Callout device for ttyE193
 638                      ...
 639 25 block       First Matsushita (Panasonic/SoundBlaster) CD-ROM
 640                  0 = /dev/sbpcd0       Panasonic CD-ROM controller 0 unit 0
 641                  1 = /dev/sbpcd1       Panasonic CD-ROM controller 0 unit 1
 642                  2 = /dev/sbpcd2       Panasonic CD-ROM controller 0 unit 2
 643                  3 = /dev/sbpcd3       Panasonic CD-ROM controller 0 unit 3
 644
 645 26 char
 646
 647 26 block       Second Matsushita (Panasonic/SoundBlaster) CD-ROM
 648                  0 = /dev/sbpcd4       Panasonic CD-ROM controller 1 unit 0
 649                  1 = /dev/sbpcd5       Panasonic CD-ROM controller 1 unit 1
 650                  2 = /dev/sbpcd6       Panasonic CD-ROM controller 1 unit 2
 651                  3 = /dev/sbpcd7       Panasonic CD-ROM controller 1 unit 3
 652
 653 27 char        QIC-117 tape
 654                  0 = /dev/qft0         Unit 0, rewind-on-close
 655                  1 = /dev/qft1         Unit 1, rewind-on-close
 656                  2 = /dev/qft2         Unit 2, rewind-on-close
 657                  3 = /dev/qft3         Unit 3, rewind-on-close
 658                  4 = /dev/nqft0        Unit 0, no rewind-on-close
 659                  5 = /dev/nqft1        Unit 1, no rewind-on-close
 660                  6 = /dev/nqft2        Unit 2, no rewind-on-close
 661                  7 = /dev/nqft3        Unit 3, no rewind-on-close
 662                 16 = /dev/zqft0        Unit 0, rewind-on-close, compression
 663                 17 = /dev/zqft1        Unit 1, rewind-on-close, compression
 664                 18 = /dev/zqft2        Unit 2, rewind-on-close, compression
 665                 19 = /dev/zqft3        Unit 3, rewind-on-close, compression
 666                 20 = /dev/nzqft0       Unit 0, no rewind-on-close, compression
 667                 21 = /dev/nzqft1       Unit 1, no rewind-on-close, compression
 668                 22 = /dev/nzqft2       Unit 2, no rewind-on-close, compression
 669                 23 = /dev/nzqft3       Unit 3, no rewind-on-close, compression
 670                 32 = /dev/rawqft0      Unit 0, rewind-on-close, no file marks
 671                 33 = /dev/rawqft1      Unit 1, rewind-on-close, no file marks
 672                 34 = /dev/rawqft2      Unit 2, rewind-on-close, no file marks
 673                 35 = /dev/rawqft3      Unit 3, rewind-on-close, no file marks
 674                 36 = /dev/nrawqft0     Unit 0, no rewind-on-close, no file marks
 675                 37 = /dev/nrawqft1     Unit 1, no rewind-on-close, no file marks
 676                 38 = /dev/nrawqft2     Unit 2, no rewind-on-close, no file marks
 677                 39 = /dev/nrawqft3     Unit 3, no rewind-on-close, no file marks
 678
 679 27 block       Third Matsushita (Panasonic/SoundBlaster) CD-ROM
 680                  0 = /dev/sbpcd8       Panasonic CD-ROM controller 2 unit 0
 681                  1 = /dev/sbpcd9       Panasonic CD-ROM controller 2 unit 1
 682                  2 = /dev/sbpcd10      Panasonic CD-ROM controller 2 unit 2
 683                  3 = /dev/sbpcd11      Panasonic CD-ROM controller 2 unit 3
 684
 685 28 char        Stallion serial card - card programming
 686                  0 = /dev/staliomem0   First Stallion card I/O memory
 687                  1 = /dev/staliomem1   Second Stallion card I/O memory
 688                  2 = /dev/staliomem2   Third Stallion card I/O memory
 689                  3 = /dev/staliomem3   Fourth Stallion card I/O memory
 690
 691 28 char        Atari SLM ACSI laser printer (68k/Atari)
 692                  0 = /dev/slm0         First SLM laser printer
 693                  1 = /dev/slm1         Second SLM laser printer
 694                    ...
 695 28 block       Fourth Matsushita (Panasonic/SoundBlaster) CD-ROM
 696                  0 = /dev/sbpcd12      Panasonic CD-ROM controller 3 unit 0
 697                  1 = /dev/sbpcd13      Panasonic CD-ROM controller 3 unit 1
 698                  2 = /dev/sbpcd14      Panasonic CD-ROM controller 3 unit 2
 699                  3 = /dev/sbpcd15      Panasonic CD-ROM controller 3 unit 3
 700
 701 28 block       ACSI disk (68k/Atari)
 702                  0 = /dev/ada          First ACSI disk whole disk
 703                 16 = /dev/adb          Second ACSI disk whole disk
 704                 32 = /dev/adc          Third ACSI disk whole disk
 705                    ...
 706                240 = /dev/adp          16th ACSI disk whole disk
 707
 708                Partitions are handled in the same way as for IDE
 709                disks (see major number 3) except that the limit on
 710                partitions is 15, like SCSI.
 711
 712 29 char        Universal frame buffer
 713                  0 = /dev/fb0          First frame buffer
 714                  1 = /dev/fb1          Second frame buffer
 715                    ...
 716                 31 = /dev/fb31         32nd frame buffer
 717
 718 29 block       Aztech/Orchid/Okano/Wearnes CD-ROM
 719                  0 = /dev/aztcd        Aztech CD-ROM
 720
 721 30 char        iBCS-2 compatibility devices
 722                  0 = /dev/socksys      Socket access
 723                  1 = /dev/spx          SVR3 local X interface
 724                 32 = /dev/inet/ip      Network access
 725                 33 = /dev/inet/icmp
 726                 34 = /dev/inet/ggp
 727                 35 = /dev/inet/ipip
 728                 36 = /dev/inet/tcp
 729                 37 = /dev/inet/egp
 730                 38 = /dev/inet/pup
 731                 39 = /dev/inet/udp
 732                 40 = /dev/inet/idp
 733                 41 = /dev/inet/rawip
 734
 735                Additionally, iBCS-2 requires the following links:
 736
 737                /dev/ip -> /dev/inet/ip
 738                /dev/icmp -> /dev/inet/icmp
 739                /dev/ggp -> /dev/inet/ggp
 740                /dev/ipip -> /dev/inet/ipip
 741                /dev/tcp -> /dev/inet/tcp
 742                /dev/egp -> /dev/inet/egp
 743                /dev/pup -> /dev/inet/pup
 744                /dev/udp -> /dev/inet/udp
 745                /dev/idp -> /dev/inet/idp
 746                /dev/rawip -> /dev/inet/rawip
 747                /dev/inet/arp -> /dev/inet/udp
 748                /dev/inet/rip -> /dev/inet/udp
 749                /dev/nfsd -> /dev/socksys
 750                /dev/X0R -> /dev/null (? apparently not required ?)
 751
 752 30 block       Philips LMS CM-205 CD-ROM
 753                  0 = /dev/cm205cd      Philips LMS CM-205 CD-ROM
 754
 755                /dev/lmscd is an older name for this device.  This
 756                driver does not work with the CM-205MS CD-ROM.
 757
 758 31 char        MPU-401 MIDI
 759                  0 = /dev/mpu401data   MPU-401 data port
 760                  1 = /dev/mpu401stat   MPU-401 status port
 761
 762 31 block       ROM/flash memory card
 763                  0 = /dev/rom0         First ROM card (rw)
 764                      ...
 765                  7 = /dev/rom7         Eighth ROM card (rw)
 766                  8 = /dev/rrom0        First ROM card (ro)
 767                    ...
 768                 15 = /dev/rrom7        Eighth ROM card (ro)
 769                 16 = /dev/flash0       First flash memory card (rw)
 770                    ...
 771                 23 = /dev/flash7       Eighth flash memory card (rw)
 772                 24 = /dev/rflash0      First flash memory card (ro)
 773                    ...
 774                 31 = /dev/rflash7      Eighth flash memory card (ro)
 775
 776                The read-write (rw) devices support back-caching
 777                written data in RAM, as well as writing to flash RAM
 778                devices.  The read-only devices (ro) support reading
 779                only.
 780
 781 32 char        Specialix serial card
 782                  0 = /dev/ttyX0        First Specialix port
 783                  1 = /dev/ttyX1        Second Specialix port
 784                    ...
 785 32 block       Philips LMS CM-206 CD-ROM
 786                  0 = /dev/cm206cd      Philips LMS CM-206 CD-ROM
 787
 788 33 char        Specialix serial card - alternate devices
 789                  0 = /dev/cux0         Callout device for ttyX0
 790                  1 = /dev/cux1         Callout device for ttyX1
 791                    ...
 792 33 block       Third IDE hard disk/CD-ROM interface
 793                  0 = /dev/hde          Master: whole disk (or CD-ROM)
 794                 64 = /dev/hdf          Slave: whole disk (or CD-ROM)
 795
 796                Partitions are handled the same way as for the first
 797                interface (see major number 3).
 798
 799 34 char        Z8530 HDLC driver
 800                  0 = /dev/scc0         First Z8530, first port
 801                  1 = /dev/scc1         First Z8530, second port
 802                  2 = /dev/scc2         Second Z8530, first port
 803                  3 = /dev/scc3         Second Z8530, second port
 804                    ...
 805
 806                In a previous version these devices were named
 807                /dev/sc1 for /dev/scc0, /dev/sc2 for /dev/scc1, and so
 808                on.
 809
 810 34 block       Fourth IDE hard disk/CD-ROM interface
 811                  0 = /dev/hdg          Master: whole disk (or CD-ROM)
 812                 64 = /dev/hdh          Slave: whole disk (or CD-ROM)
 813
 814                Partitions are handled the same way as for the first
 815                interface (see major number 3).
 816
 817 35 char        tclmidi MIDI driver
 818                  0 = /dev/midi0        First MIDI port, kernel timed
 819                  1 = /dev/midi1        Second MIDI port, kernel timed
 820                  2 = /dev/midi2        Third MIDI port, kernel timed
 821                  3 = /dev/midi3        Fourth MIDI port, kernel timed
 822                 64 = /dev/rmidi0       First MIDI port, untimed
 823                 65 = /dev/rmidi1       Second MIDI port, untimed
 824                 66 = /dev/rmidi2       Third MIDI port, untimed
 825                 67 = /dev/rmidi3       Fourth MIDI port, untimed
 826                128 = /dev/smpte0       First MIDI port, SMPTE timed
 827                129 = /dev/smpte1       Second MIDI port, SMPTE timed
 828                130 = /dev/smpte2       Third MIDI port, SMPTE timed
 829                131 = /dev/smpte3       Fourth MIDI port, SMPTE timed
 830
 831 35 block       Slow memory ramdisk
 832                  0 = /dev/slram        Slow memory ramdisk
 833
 834 36 char        Netlink support
 835                  0 = /dev/route        Routing, device updates, kernel to user
 836                  1 = /dev/skip         enSKIP security cache control
 837                  3 = /dev/fwmonitor    Firewall packet copies
 838                 16 = /dev/tap0         First Ethertap device
 839                    ...
 840                 31 = /dev/tap15        16th Ethertap device
 841
 842 36 block       MCA ESDI hard disk
 843                  0 = /dev/eda          First ESDI disk whole disk
 844                 64 = /dev/edb          Second ESDI disk whole disk
 845                    ...
 846
 847                Partitions are handled in the same way as IDE disks
 848                (see major number 3).
 849
 850 37 char        IDE tape
 851                  0 = /dev/ht0          First IDE tape
 852                  1 = /dev/ht1          Second IDE tape
 853                    ...
 854                128 = /dev/nht0         First IDE tape, no rewind-on-close
 855                129 = /dev/nht1         Second IDE tape, no rewind-on-close
 856                    ...
 857
 858                Currently, only one IDE tape drive is supported.
 859
 860 37 block       Zorro II ramdisk
 861                  0 = /dev/z2ram        Zorro II ramdisk
 862
 863 38 char        Myricom PCI Myrinet board
 864                  0 = /dev/mlanai0      First Myrinet board
 865                  1 = /dev/mlanai1      Second Myrinet board
 866                    ...
 867
 868                This device is used for status query, board control
 869                and "user level packet I/O."  This board is also
 870                accessible as a standard networking "eth" device.
 871
 872 38 block       OBSOLETE (was Linux/AP+)
 873
 874 39 char        ML-16P experimental I/O board
 875                  0 = /dev/ml16pa-a0    First card, first analog channel
 876                  1 = /dev/ml16pa-a1    First card, second analog channel
 877                    ...
 878                 15 = /dev/ml16pa-a15   First card, 16th analog channel
 879                 16 = /dev/ml16pa-d     First card, digital lines
 880                 17 = /dev/ml16pa-c0    First card, first counter/timer
 881                 18 = /dev/ml16pa-c1    First card, second counter/timer
 882                 19 = /dev/ml16pa-c2    First card, third counter/timer
 883                 32 = /dev/ml16pb-a0    Second card, first analog channel
 884                 33 = /dev/ml16pb-a1    Second card, second analog channel
 885                    ...
 886                 47 = /dev/ml16pb-a15   Second card, 16th analog channel
 887                 48 = /dev/ml16pb-d     Second card, digital lines
 888                 49 = /dev/ml16pb-c0    Second card, first counter/timer
 889                 50 = /dev/ml16pb-c1    Second card, second counter/timer
 890                 51 = /dev/ml16pb-c2    Second card, third counter/timer
 891                      ...
 892 39 block
 893
 894 40 char
 895
 896 40 block
 897
 898 41 char        Yet Another Micro Monitor
 899                  0 = /dev/yamm         Yet Another Micro Monitor
 900
 901 41 block
 902
 903 42 char        Demo/sample use
 904
 905 42 block       Demo/sample use
 906
 907                This number is intended for use in sample code, as
 908                well as a general "example" device number.  It
 909                should never be used for a device driver that is being
 910                distributed; either obtain an official number or use
 911                the local/experimental range.  The sudden addition or
 912                removal of a driver with this number should not cause
 913                ill effects to the system (bugs excepted.)
 914
 915                IN PARTICULAR, ANY DISTRIBUTION WHICH CONTAINS A
 916                DEVICE DRIVER USING MAJOR NUMBER 42 IS NONCOMPLIANT.
 917
 918 43 char        isdn4linux virtual modem
 919                  0 = /dev/ttyI0        First virtual modem
 920                    ...
 921                 63 = /dev/ttyI63       64th virtual modem
 922
 923 43 block       Network block devices
 924                  0 = /dev/nb0          First network block device
 925                  1 = /dev/nb1          Second network block device
 926                    ...
 927
 928                Network Block Device is somehow similar to loopback
 929                devices: If you read from it, it sends packet across
 930                network asking server for data. If you write to it, it
 931                sends packet telling server to write. It could be used
 932                to mounting filesystems over the net, swapping over
 933                the net, implementing block device in userland etc.
 934
 935 44 char        isdn4linux virtual modem - alternate devices
 936                  0 = /dev/cui0         Callout device for ttyI0
 937                    ...
 938                 63 = /dev/cui63        Callout device for ttyI63
 939
 940 44 block       Flash Translation Layer (FTL) filesystems
 941                  0 = /dev/ftla         FTL on first Memory Technology Device
 942                 16 = /dev/ftlb         FTL on second Memory Technology Device
 943                 32 = /dev/ftlc         FTL on third Memory Technology Device
 944                    ...
 945                240 = /dev/ftlp         FTL on 16th Memory Technology Device
 946
 947                Partitions are handled in the same way as for IDE
 948                disks (see major number 3) except that the partition
 949                limit is 15 rather than 63 per disk (same as SCSI.)
 950
 951 45 char        isdn4linux ISDN BRI driver
 952                  0 = /dev/isdn0        First virtual B channel raw data
 953                    ...
 954                 63 = /dev/isdn63       64th virtual B channel raw data
 955                 64 = /dev/isdnctrl0    First channel control/debug
 956                    ...
 957                127 = /dev/isdnctrl63   64th channel control/debug
 958
 959                128 = /dev/ippp0        First SyncPPP device
 960                    ...
 961                191 = /dev/ippp63       64th SyncPPP device
 962
 963                255 = /dev/isdninfo     ISDN monitor interface
 964
 965 45 block       Parallel port IDE disk devices
 966                  0 = /dev/pda          First parallel port IDE disk
 967                 16 = /dev/pdb          Second parallel port IDE disk
 968                 32 = /dev/pdc          Third parallel port IDE disk
 969                 48 = /dev/pdd          Fourth parallel port IDE disk
 970
 971                Partitions are handled in the same way as for IDE
 972                disks (see major number 3) except that the partition
 973                limit is 15 rather than 63 per disk.
 974
 975 46 char        Comtrol Rocketport serial card
 976                  0 = /dev/ttyR0        First Rocketport port
 977                  1 = /dev/ttyR1        Second Rocketport port
 978                    ...
 979 46 block       Parallel port ATAPI CD-ROM devices
 980                  0 = /dev/pcd0         First parallel port ATAPI CD-ROM
 981                  1 = /dev/pcd1         Second parallel port ATAPI CD-ROM
 982                  2 = /dev/pcd2         Third parallel port ATAPI CD-ROM
 983                  3 = /dev/pcd3         Fourth parallel port ATAPI CD-ROM
 984
 985 47 char        Comtrol Rocketport serial card - alternate devices
 986                  0 = /dev/cur0         Callout device for ttyR0
 987                  1 = /dev/cur1         Callout device for ttyR1
 988                    ...
 989 47 block       Parallel port ATAPI disk devices
 990                  0 = /dev/pf0          First parallel port ATAPI disk
 991                  1 = /dev/pf1          Second parallel port ATAPI disk
 992                  2 = /dev/pf2          Third parallel port ATAPI disk
 993                  3 = /dev/pf3          Fourth parallel port ATAPI disk
 994
 995                This driver is intended for floppy disks and similar
 996                devices and hence does not support partitioning.
 997
 998 48 char        SDL RISCom serial card
 999                  0 = /dev/ttyL0        First RISCom port
1000                  1 = /dev/ttyL1        Second RISCom port
1001                    ...
1002 48 block       Mylex DAC960 PCI RAID controller; first controller
1003                  0 = /dev/rd/c0d0      First disk, whole disk
1004                  8 = /dev/rd/c0d1      Second disk, whole disk
1005                    ...
1006                248 = /dev/rd/c0d31     32nd disk, whole disk
1007
1008                For partitions add:
1009                  0 = /dev/rd/c?d?      Whole disk
1010                  1 = /dev/rd/c?d?p1    First partition
1011                    ...
1012                  7 = /dev/rd/c?d?p7    Seventh partition
1013
1014 49 char        SDL RISCom serial card - alternate devices
1015                  0 = /dev/cul0         Callout device for ttyL0
1016                  1 = /dev/cul1         Callout device for ttyL1
1017                    ...
1018 49 block       Mylex DAC960 PCI RAID controller; second controller
1019                  0 = /dev/rd/c1d0      First disk, whole disk
1020                  8 = /dev/rd/c1d1      Second disk, whole disk
1021                    ...
1022                248 = /dev/rd/c1d31     32nd disk, whole disk
1023
1024                Partitions are handled as for major 48.
1025
1026 50 char        Reserved for GLINT
1027
1028 50 block       Mylex DAC960 PCI RAID controller; third controller
1029                  0 = /dev/rd/c2d0      First disk, whole disk
1030                  8 = /dev/rd/c2d1      Second disk, whole disk
1031                    ...
1032                248 = /dev/rd/c2d31     32nd disk, whole disk
1033
1034 51 char        Baycom radio modem OR Radio Tech BIM-XXX-RS232 radio modem
1035                  0 = /dev/bc0          First Baycom radio modem
1036                  1 = /dev/bc1          Second Baycom radio modem
1037                    ...
1038 51 block       Mylex DAC960 PCI RAID controller; fourth controller
1039                  0 = /dev/rd/c3d0      First disk, whole disk
1040                  8 = /dev/rd/c3d1      Second disk, whole disk
1041                    ...
1042                248 = /dev/rd/c3d31     32nd disk, whole disk
1043
1044                Partitions are handled as for major 48.
1045
1046 52 char        Spellcaster DataComm/BRI ISDN card
1047                  0 = /dev/dcbri0       First DataComm card
1048                  1 = /dev/dcbri1       Second DataComm card
1049                  2 = /dev/dcbri2       Third DataComm card
1050                  3 = /dev/dcbri3       Fourth DataComm card
1051
1052 52 block       Mylex DAC960 PCI RAID controller; fifth controller
1053                  0 = /dev/rd/c4d0      First disk, whole disk
1054                  8 = /dev/rd/c4d1      Second disk, whole disk
1055                    ...
1056                248 = /dev/rd/c4d31     32nd disk, whole disk
1057
1058                Partitions are handled as for major 48.
1059
1060 53 char        BDM interface for remote debugging MC683xx microcontrollers
1061                  0 = /dev/pd_bdm0      PD BDM interface on lp0
1062                  1 = /dev/pd_bdm1      PD BDM interface on lp1
1063                  2 = /dev/pd_bdm2      PD BDM interface on lp2
1064                  4 = /dev/icd_bdm0     ICD BDM interface on lp0
1065                  5 = /dev/icd_bdm1     ICD BDM interface on lp1
1066                  6 = /dev/icd_bdm2     ICD BDM interface on lp2
1067
1068                This device is used for the interfacing to the MC683xx
1069                microcontrollers via Background Debug Mode by use of a
1070                Parallel Port interface. PD is the Motorola Public
1071                Domain Interface and ICD is the commercial interface
1072                by P&E.
1073
1074 53 block       Mylex DAC960 PCI RAID controller; sixth controller
1075                  0 = /dev/rd/c5d0      First disk, whole disk
1076                  8 = /dev/rd/c5d1      Second disk, whole disk
1077                    ...
1078                248 = /dev/rd/c5d31     32nd disk, whole disk
1079
1080                Partitions are handled as for major 48.
1081
1082 54 char        Electrocardiognosis Holter serial card
1083                  0 = /dev/holter0      First Holter port
1084                  1 = /dev/holter1      Second Holter port
1085                  2 = /dev/holter2      Third Holter port
1086
1087                A custom serial card used by Electrocardiognosis SRL
1088                <mseritan@ottonel.pub.ro> to transfer data from Holter
1089                24-hour heart monitoring equipment.
1090
1091 54 block       Mylex DAC960 PCI RAID controller; seventh controller
1092                  0 = /dev/rd/c6d0      First disk, whole disk
1093                  8 = /dev/rd/c6d1      Second disk, whole disk
1094                    ...
1095                248 = /dev/rd/c6d31     32nd disk, whole disk
1096
1097                Partitions are handled as for major 48.
1098
1099 55 char        DSP56001 digital signal processor
1100                  0 = /dev/dsp56k       First DSP56001
1101
1102 55 block       Mylex DAC960 PCI RAID controller; eighth controller
1103                  0 = /dev/rd/c7d0      First disk, whole disk
1104                  8 = /dev/rd/c7d1      Second disk, whole disk
1105                    ...
1106                248 = /dev/rd/c7d31     32nd disk, whole disk
1107
1108                Partitions are handled as for major 48.
1109
1110 56 char        Apple Desktop Bus
1111                  0 = /dev/adb          ADB bus control
1112
1113                Additional devices will be added to this number, all
1114                starting with /dev/adb.
1115
1116 56 block       Fifth IDE hard disk/CD-ROM interface
1117                  0 = /dev/hdi          Master: whole disk (or CD-ROM)
1118                 64 = /dev/hdj          Slave: whole disk (or CD-ROM)
1119
1120                Partitions are handled the same way as for the first
1121                interface (see major number 3).
1122
1123 57 char        Hayes ESP serial card
1124                  0 = /dev/ttyP0        First ESP port
1125                  1 = /dev/ttyP1        Second ESP port
1126                    ...
1127
1128 57 block       Sixth IDE hard disk/CD-ROM interface
1129                  0 = /dev/hdk          Master: whole disk (or CD-ROM)
1130                 64 = /dev/hdl          Slave: whole disk (or CD-ROM)
1131
1132                Partitions are handled the same way as for the first
1133                interface (see major number 3).
1134
1135 58 char        Hayes ESP serial card - alternate devices
1136                  0 = /dev/cup0         Callout device for ttyP0
1137                  1 = /dev/cup1         Callout device for ttyP1
1138                    ...
1139
1140 58 block       Reserved for logical volume manager
1141
1142 59 char        sf firewall package
1143                  0 = /dev/firewall     Communication with sf kernel module
1144
1145 59 block       Generic PDA filesystem device
1146                  0 = /dev/pda0         First PDA device
1147                  1 = /dev/pda1         Second PDA device
1148                    ...
1149
1150                The pda devices are used to mount filesystems on
1151                remote pda's (basically slow handheld machines with
1152                proprietary OS's and limited memory and storage
1153                running small fs translation drivers) through serial /
1154                IRDA / parallel links.
1155
1156                NAMING CONFLICT -- PROPOSED REVISED NAME /dev/rpda0 etc
1157
1158 60-63 char     LOCAL/EXPERIMENTAL USE
1159
1160 60-63 block    LOCAL/EXPERIMENTAL USE
1161                Allocated for local/experimental use.  For devices not
1162                assigned official numbers, these ranges should be
1163                used in order to avoid conflicting with future assignments.
1164
1165 64 char        ENskip kernel encryption package
1166                  0 = /dev/enskip       Communication with ENskip kernel module
1167
1168 64 block       Scramdisk/DriveCrypt encrypted devices
1169                  0 = /dev/scramdisk/master    Master node for ioctls
1170                  1 = /dev/scramdisk/1         First encrypted device
1171                  2 = /dev/scramdisk/2         Second encrypted device
1172                  ...
1173                255 = /dev/scramdisk/255       255th encrypted device
1174
1175                The filename of the encrypted container and the passwords
1176                are sent via ioctls (using the sdmount tool) to the master
1177                node which then activates them via one of the
1178                /dev/scramdisk/x nodes for loop mounting (all handled
1179                through the sdmount tool).
1180
1181                Requested by: andy@scramdisklinux.org
1182
1183 65 char        Sundance "plink" Transputer boards (obsolete, unused)
1184                  0 = /dev/plink0       First plink device
1185                  1 = /dev/plink1       Second plink device
1186                  2 = /dev/plink2       Third plink device
1187                  3 = /dev/plink3       Fourth plink device
1188                 64 = /dev/rplink0      First plink device, raw
1189                 65 = /dev/rplink1      Second plink device, raw
1190                 66 = /dev/rplink2      Third plink device, raw
1191                 67 = /dev/rplink3      Fourth plink device, raw
1192                128 = /dev/plink0d      First plink device, debug
1193                129 = /dev/plink1d      Second plink device, debug
1194                130 = /dev/plink2d      Third plink device, debug
1195                131 = /dev/plink3d      Fourth plink device, debug
1196                192 = /dev/rplink0d     First plink device, raw, debug
1197                193 = /dev/rplink1d     Second plink device, raw, debug
1198                194 = /dev/rplink2d     Third plink device, raw, debug
1199                195 = /dev/rplink3d     Fourth plink device, raw, debug
1200
1201                This is a commercial driver; contact James Howes
1202                <jth@prosig.demon.co.uk> for information.
1203
1204 65 block       SCSI disk devices (16-31)
1205                  0 = /dev/sdq          17th SCSI disk whole disk
1206                 16 = /dev/sdr          18th SCSI disk whole disk
1207                 32 = /dev/sds          19th SCSI disk whole disk
1208                    ...
1209                240 = /dev/sdaf         32nd SCSI disk whole disk
1210
1211                Partitions are handled in the same way as for IDE
1212                disks (see major number 3) except that the limit on
1213                partitions is 15.
1214
1215 66 char        YARC PowerPC PCI coprocessor card
1216                  0 = /dev/yppcpci0     First YARC card
1217                  1 = /dev/yppcpci1     Second YARC card
1218                    ...
1219
1220 66 block       SCSI disk devices (32-47)
1221                  0 = /dev/sdag         33th SCSI disk whole disk
1222                 16 = /dev/sdah         34th SCSI disk whole disk
1223                 32 = /dev/sdai         35th SCSI disk whole disk
1224                    ...
1225                240 = /dev/sdav         48nd SCSI disk whole disk
1226
1227                Partitions are handled in the same way as for IDE
1228                disks (see major number 3) except that the limit on
1229                partitions is 15.
1230
1231 67 char        Coda network file system
1232                  0 = /dev/cfs0         Coda cache manager
1233
1234                See http://www.coda.cs.cmu.edu for information about Coda.
1235
1236 67 block       SCSI disk devices (48-63)
1237                  0 = /dev/sdaw         49th SCSI disk whole disk
1238                 16 = /dev/sdax         50th SCSI disk whole disk
1239                 32 = /dev/sday         51st SCSI disk whole disk
1240                    ...
1241                240 = /dev/sdbl         64th SCSI disk whole disk
1242
1243                Partitions are handled in the same way as for IDE
1244                disks (see major number 3) except that the limit on
1245                partitions is 15.
1246
1247 68 char        CAPI 2.0 interface
1248                  0 = /dev/capi20       Control device
1249                  1 = /dev/capi20.00    First CAPI 2.0 application
1250                  2 = /dev/capi20.01    Second CAPI 2.0 application
1251                    ...
1252                 20 = /dev/capi20.19    19th CAPI 2.0 application
1253
1254                ISDN CAPI 2.0 driver for use with CAPI 2.0
1255                applications; currently supports the AVM B1 card.
1256
1257 68 block       SCSI disk devices (64-79)
1258                  0 = /dev/sdbm         65th SCSI disk whole disk
1259                 16 = /dev/sdbn         66th SCSI disk whole disk
1260                 32 = /dev/sdbo         67th SCSI disk whole disk
1261                    ...
1262                240 = /dev/sdcb         80th SCSI disk whole disk
1263
1264                Partitions are handled in the same way as for IDE
1265                disks (see major number 3) except that the limit on
1266                partitions is 15.
1267
1268 69 char        MA16 numeric accelerator card
1269                  0 = /dev/ma16         Board memory access
1270
1271 69 block       SCSI disk devices (80-95)
1272                  0 = /dev/sdcc         81st SCSI disk whole disk
1273                 16 = /dev/sdcd         82nd SCSI disk whole disk
1274                 32 = /dev/sdce         83th SCSI disk whole disk
1275                    ...
1276                240 = /dev/sdcr         96th SCSI disk whole disk
1277
1278                Partitions are handled in the same way as for IDE
1279                disks (see major number 3) except that the limit on
1280                partitions is 15.
1281
1282 70 char        SpellCaster Protocol Services Interface
1283                  0 = /dev/apscfg       Configuration interface
1284                  1 = /dev/apsauth      Authentication interface
1285                  2 = /dev/apslog       Logging interface
1286                  3 = /dev/apsdbg       Debugging interface
1287                 64 = /dev/apsisdn      ISDN command interface
1288                 65 = /dev/apsasync     Async command interface
1289                128 = /dev/apsmon       Monitor interface
1290
1291 70 block       SCSI disk devices (96-111)
1292                  0 = /dev/sdcs         97th SCSI disk whole disk
1293                 16 = /dev/sdct         98th SCSI disk whole disk
1294                 32 = /dev/sdcu         99th SCSI disk whole disk
1295                    ...
1296                240 = /dev/sddh         112nd SCSI disk whole disk
1297
1298                Partitions are handled in the same way as for IDE
1299                disks (see major number 3) except that the limit on
1300                partitions is 15.
1301
1302 71 char        Computone IntelliPort II serial card
1303                  0 = /dev/ttyF0        IntelliPort II board 0, port 0
1304                  1 = /dev/ttyF1        IntelliPort II board 0, port 1
1305                    ...
1306                 63 = /dev/ttyF63       IntelliPort II board 0, port 63
1307                 64 = /dev/ttyF64       IntelliPort II board 1, port 0
1308                 65 = /dev/ttyF65       IntelliPort II board 1, port 1
1309                    ...
1310                127 = /dev/ttyF127      IntelliPort II board 1, port 63
1311                128 = /dev/ttyF128      IntelliPort II board 2, port 0
1312                129 = /dev/ttyF129      IntelliPort II board 2, port 1
1313                    ...
1314                191 = /dev/ttyF191      IntelliPort II board 2, port 63
1315                192 = /dev/ttyF192      IntelliPort II board 3, port 0
1316                193 = /dev/ttyF193      IntelliPort II board 3, port 1
1317                    ...
1318                255 = /dev/ttyF255      IntelliPort II board 3, port 63
1319
1320 71 block       SCSI disk devices (112-127)
1321                  0 = /dev/sddi         113th SCSI disk whole disk
1322                 16 = /dev/sddj         114th SCSI disk whole disk
1323                 32 = /dev/sddk         115th SCSI disk whole disk
1324                    ...
1325                240 = /dev/sddx         128th SCSI disk whole disk
1326
1327                Partitions are handled in the same way as for IDE
1328                disks (see major number 3) except that the limit on
1329                partitions is 15.
1330
1331 72 char        Computone IntelliPort II serial card - alternate devices
1332                  0 = /dev/cuf0         Callout device for ttyF0
1333                  1 = /dev/cuf1         Callout device for ttyF1
1334                    ...
1335                 63 = /dev/cuf63        Callout device for ttyF63
1336                 64 = /dev/cuf64        Callout device for ttyF64
1337                 65 = /dev/cuf65        Callout device for ttyF65
1338                    ...
1339                127 = /dev/cuf127       Callout device for ttyF127
1340                128 = /dev/cuf128       Callout device for ttyF128
1341                129 = /dev/cuf129       Callout device for ttyF129
1342                    ...
1343                191 = /dev/cuf191       Callout device for ttyF191
1344                192 = /dev/cuf192       Callout device for ttyF192
1345                193 = /dev/cuf193       Callout device for ttyF193
1346                    ...
1347                255 = /dev/cuf255       Callout device for ttyF255
1348
1349 72 block       Compaq Intelligent Drive Array, first controller
1350                  0 = /dev/ida/c0d0     First logical drive whole disk
1351                 16 = /dev/ida/c0d1     Second logical drive whole disk
1352                    ...
1353                240 = /dev/ida/c0d15    16th logical drive whole disk
1354
1355                Partitions are handled the same way as for Mylex
1356                DAC960 (see major number 48) except that the limit on
1357                partitions is 15.
1358
1359 73 char        Computone IntelliPort II serial card - control devices
1360                  0 = /dev/ip2ipl0      Loadware device for board 0
1361                  1 = /dev/ip2stat0     Status device for board 0
1362                  4 = /dev/ip2ipl1      Loadware device for board 1
1363                  5 = /dev/ip2stat1     Status device for board 1
1364                  8 = /dev/ip2ipl2      Loadware device for board 2
1365                  9 = /dev/ip2stat2     Status device for board 2
1366                 12 = /dev/ip2ipl3      Loadware device for board 3
1367                 13 = /dev/ip2stat3     Status device for board 3
1368
1369 73 block       Compaq Intelligent Drive Array, second controller
1370                  0 = /dev/ida/c1d0     First logical drive whole disk
1371                 16 = /dev/ida/c1d1     Second logical drive whole disk
1372                    ...
1373                240 = /dev/ida/c1d15    16th logical drive whole disk
1374
1375                Partitions are handled the same way as for Mylex
1376                DAC960 (see major number 48) except that the limit on
1377                partitions is 15.
1378
1379 74 char        SCI bridge
1380                  0 = /dev/SCI/0        SCI device 0
1381                  1 = /dev/SCI/1        SCI device 1
1382                    ...
1383
1384                Currently for Dolphin Interconnect Solutions' PCI-SCI
1385                bridge.
1386
1387 74 block       Compaq Intelligent Drive Array, third controller
1388                  0 = /dev/ida/c2d0     First logical drive whole disk
1389                 16 = /dev/ida/c2d1     Second logical drive whole disk
1390                    ...
1391                240 = /dev/ida/c2d15    16th logical drive whole disk
1392
1393                Partitions are handled the same way as for Mylex
1394                DAC960 (see major number 48) except that the limit on
1395                partitions is 15.
1396
1397 75 char        Specialix IO8+ serial card
1398                  0 = /dev/ttyW0        First IO8+ port, first card
1399                  1 = /dev/ttyW1        Second IO8+ port, first card
1400                    ...
1401                  8 = /dev/ttyW8        First IO8+ port, second card
1402                    ...
1403
1404 75 block       Compaq Intelligent Drive Array, fourth controller
1405                  0 = /dev/ida/c3d0     First logical drive whole disk
1406                 16 = /dev/ida/c3d1     Second logical drive whole disk
1407                    ...
1408                240 = /dev/ida/c3d15    16th logical drive whole disk
1409
1410                Partitions are handled the same way as for Mylex
1411                DAC960 (see major number 48) except that the limit on
1412                partitions is 15.
1413
1414 76 char        Specialix IO8+ serial card - alternate devices
1415                  0 = /dev/cuw0         Callout device for ttyW0
1416                  1 = /dev/cuw1         Callout device for ttyW1
1417                    ...
1418                  8 = /dev/cuw8         Callout device for ttyW8
1419                    ...
1420
1421 76 block       Compaq Intelligent Drive Array, fifth controller
1422                  0 = /dev/ida/c4d0     First logical drive whole disk
1423                 16 = /dev/ida/c4d1     Second logical drive whole disk
1424                    ...
1425                240 = /dev/ida/c4d15    16th logical drive whole disk
1426
1427                Partitions are handled the same way as for Mylex
1428                DAC960 (see major number 48) except that the limit on
1429                partitions is 15.
1430
1431
1432 77 char        ComScire Quantum Noise Generator
1433                  0 = /dev/qng          ComScire Quantum Noise Generator
1434
1435 77 block       Compaq Intelligent Drive Array, sixth controller
1436                  0 = /dev/ida/c5d0     First logical drive whole disk
1437                 16 = /dev/ida/c5d1     Second logical drive whole disk
1438                    ...
1439                240 = /dev/ida/c5d15    16th logical drive whole disk
1440
1441                Partitions are handled the same way as for Mylex
1442                DAC960 (see major number 48) except that the limit on
1443                partitions is 15.
1444
1445 78 char        PAM Software's multimodem boards
1446                  0 = /dev/ttyM0        First PAM modem
1447                  1 = /dev/ttyM1        Second PAM modem
1448                    ...
1449
1450 78 block       Compaq Intelligent Drive Array, seventh controller
1451                  0 = /dev/ida/c6d0     First logical drive whole disk
1452                 16 = /dev/ida/c6d1     Second logical drive whole disk
1453                    ...
1454                240 = /dev/ida/c6d15    16th logical drive whole disk
1455
1456                Partitions are handled the same way as for Mylex
1457                DAC960 (see major number 48) except that the limit on
1458                partitions is 15.
1459
1460 79 char        PAM Software's multimodem boards - alternate devices
1461                  0 = /dev/cum0         Callout device for ttyM0
1462                  1 = /dev/cum1         Callout device for ttyM1
1463                    ...
1464
1465 79 block       Compaq Intelligent Drive Array, eighth controller
1466                  0 = /dev/ida/c7d0     First logical drive whole disk
1467                 16 = /dev/ida/c7d1     Second logical drive whole disk
1468                    ...
1469                240 = /dev/ida/c715     16th logical drive whole disk
1470
1471                Partitions are handled the same way as for Mylex
1472                DAC960 (see major number 48) except that the limit on
1473                partitions is 15.
1474
1475 80 char        Photometrics AT200 CCD camera
1476                  0 = /dev/at200        Photometrics AT200 CCD camera
1477
1478 80 block       I2O hard disk
1479                  0 = /dev/i2o/hda      First I2O hard disk, whole disk
1480                 16 = /dev/i2o/hdb      Second I2O hard disk, whole disk
1481                    ...
1482                240 = /dev/i2o/hdp      16th I2O hard disk, whole disk
1483
1484                Partitions are handled in the same way as for IDE
1485                disks (see major number 3) except that the limit on
1486                partitions is 15.
1487
1488 81 char        video4linux
1489                  0 = /dev/video0       Video capture/overlay device
1490                    ...
1491                 63 = /dev/video63      Video capture/overlay device
1492                 64 = /dev/radio0       Radio device
1493                    ...
1494                127 = /dev/radio63      Radio device
1495                192 = /dev/vtx0         Teletext device
1496                    ...
1497                223 = /dev/vtx31        Teletext device
1498                224 = /dev/vbi0         Vertical blank interrupt
1499                    ...
1500                255 = /dev/vbi31        Vertical blank interrupt
1501
1502 81 block       I2O hard disk
1503                  0 = /dev/i2o/hdq      17th I2O hard disk, whole disk
1504                 16 = /dev/i2o/hdr      18th I2O hard disk, whole disk
1505                    ...
1506                240 = /dev/i2o/hdaf     32nd I2O hard disk, whole disk
1507
1508                Partitions are handled in the same way as for IDE
1509                disks (see major number 3) except that the limit on
1510                partitions is 15.
1511
1512 82 char        WiNRADiO communications receiver card
1513                  0 = /dev/winradio0    First WiNRADiO card
1514                  1 = /dev/winradio1    Second WiNRADiO card
1515                    ...
1516
1517                The driver and documentation may be obtained from
1518                http://www.proximity.com.au/~brian/winradio/
1519
1520 82 block       I2O hard disk
1521                  0 = /dev/i2o/hdag     33rd I2O hard disk, whole disk
1522                 16 = /dev/i2o/hdah     34th I2O hard disk, whole disk
1523                    ...
1524                240 = /dev/i2o/hdav     48th I2O hard disk, whole disk
1525
1526                Partitions are handled in the same way as for IDE
1527                disks (see major number 3) except that the limit on
1528                partitions is 15.
1529
1530 83 char        Matrox mga_vid video driver
1531                 0 = /dev/mga_vid0      1st video card
1532                 1 = /dev/mga_vid1      2nd video card
1533                 2 = /dev/mga_vid2      3rd video card
1534                  ...
1535                15 = /dev/mga_vid15     16th video card
1536
1537 83 block       I2O hard disk
1538                  0 = /dev/i2o/hdaw     49th I2O hard disk, whole disk
1539                 16 = /dev/i2o/hdax     50th I2O hard disk, whole disk
1540                    ...
1541                240 = /dev/i2o/hdbl     64th I2O hard disk, whole disk
1542
1543                Partitions are handled in the same way as for IDE
1544                disks (see major number 3) except that the limit on
1545                partitions is 15.
1546
1547 84 char        Ikon 1011[57] Versatec Greensheet Interface
1548                  0 = /dev/ihcp0        First Greensheet port
1549                  1 = /dev/ihcp1        Second Greensheet port
1550
1551 84 block       I2O hard disk
1552                  0 = /dev/i2o/hdbm     65th I2O hard disk, whole disk
1553                 16 = /dev/i2o/hdbn     66th I2O hard disk, whole disk
1554                    ...
1555                240 = /dev/i2o/hdcb     80th I2O hard disk, whole disk
1556
1557                Partitions are handled in the same way as for IDE
1558                disks (see major number 3) except that the limit on
1559                partitions is 15.
1560
1561 85 char        Linux/SGI shared memory input queue
1562                  0 = /dev/shmiq        Master shared input queue
1563                  1 = /dev/qcntl0       First device pushed
1564                  2 = /dev/qcntl1       Second device pushed
1565                    ...
1566
1567 85 block       I2O hard disk
1568                  0 = /dev/i2o/hdcc     81st I2O hard disk, whole disk
1569                 16 = /dev/i2o/hdcd     82nd I2O hard disk, whole disk
1570                    ...
1571                240 = /dev/i2o/hdcr     96th I2O hard disk, whole disk
1572
1573                Partitions are handled in the same way as for IDE
1574                disks (see major number 3) except that the limit on
1575                partitions is 15.
1576
1577 86 char        SCSI media changer
1578                  0 = /dev/sch0         First SCSI media changer
1579                  1 = /dev/sch1         Second SCSI media changer
1580                    ...
1581
1582 86 block       I2O hard disk
1583                  0 = /dev/i2o/hdcs     97th I2O hard disk, whole disk
1584                 16 = /dev/i2o/hdct     98th I2O hard disk, whole disk
1585                    ...
1586                240 = /dev/i2o/hddh     112th I2O hard disk, whole disk
1587
1588                Partitions are handled in the same way as for IDE
1589                disks (see major number 3) except that the limit on
1590                partitions is 15.
1591
1592 87 char        Sony Control-A1 stereo control bus
1593                  0 = /dev/controla0    First device on chain
1594                  1 = /dev/controla1    Second device on chain
1595                    ...
1596
1597 87 block       I2O hard disk
1598                  0 = /dev/i2o/hddi     113rd I2O hard disk, whole disk
1599                 16 = /dev/i2o/hddj     114th I2O hard disk, whole disk
1600                    ...
1601                240 = /dev/i2o/hddx     128th I2O hard disk, whole disk
1602
1603                Partitions are handled in the same way as for IDE
1604                disks (see major number 3) except that the limit on
1605                partitions is 15.
1606
1607 88 char        COMX synchronous serial card
1608                  0 = /dev/comx0        COMX channel 0
1609                  1 = /dev/comx1        COMX channel 1
1610                    ...
1611
1612 88 block       Seventh IDE hard disk/CD-ROM interface
1613                  0 = /dev/hdm          Master: whole disk (or CD-ROM)
1614                 64 = /dev/hdn          Slave: whole disk (or CD-ROM)
1615
1616                Partitions are handled the same way as for the first
1617                interface (see major number 3).
1618
1619 89 char        I2C bus interface
1620                  0 = /dev/i2c-0        First I2C adapter
1621                  1 = /dev/i2c-1        Second I2C adapter
1622                    ...
1623
1624 89 block       Eighth IDE hard disk/CD-ROM interface
1625                  0 = /dev/hdo          Master: whole disk (or CD-ROM)
1626                 64 = /dev/hdp          Slave: whole disk (or CD-ROM)
1627
1628                Partitions are handled the same way as for the first
1629                interface (see major number 3).
1630
1631 90 char        Memory Technology Device (RAM, ROM, Flash)
1632                  0 = /dev/mtd0         First MTD (rw)
1633                  1 = /dev/mtdr0        First MTD (ro)
1634                    ...
1635                 30 = /dev/mtd15        16th MTD (rw)
1636                 31 = /dev/mtdr15       16th MTD (ro)
1637
1638 90 block       Ninth IDE hard disk/CD-ROM interface
1639                  0 = /dev/hdq          Master: whole disk (or CD-ROM)
1640                 64 = /dev/hdr          Slave: whole disk (or CD-ROM)
1641
1642                Partitions are handled the same way as for the first
1643                interface (see major number 3).
1644
1645 91 char        CAN-Bus devices
1646                  0 = /dev/can0         First CAN-Bus controller
1647                  1 = /dev/can1         Second CAN-Bus controller
1648                    ...
1649
1650 91 block       Tenth IDE hard disk/CD-ROM interface
1651                  0 = /dev/hds          Master: whole disk (or CD-ROM)
1652                 64 = /dev/hdt          Slave: whole disk (or CD-ROM)
1653
1654                Partitions are handled the same way as for the first
1655                interface (see major number 3).
1656
1657 92 char        Reserved for ith Kommunikationstechnik MIC ISDN card
1658
1659 92 block       PPDD encrypted disk driver
1660                  0 = /dev/ppdd0        First encrypted disk
1661                  1 = /dev/ppdd1        Second encrypted disk
1662                    ...
1663
1664                Partitions are handled in the same way as for IDE
1665                disks (see major number 3) except that the limit on
1666                partitions is 15.
1667
1668 93 char
1669
1670 93 block       NAND Flash Translation Layer filesystem
1671                  0 = /dev/nftla        First NFTL layer
1672                 16 = /dev/nftlb        Second NFTL layer
1673                    ...
1674                240 = /dev/nftlp        16th NTFL layer
1675
1676 94 char
1677
1678 94 block       IBM S/390 DASD block storage
1679                  0 = /dev/dasda First DASD device, major
1680                  1 = /dev/dasda1 First DASD device, block 1
1681                  2 = /dev/dasda2 First DASD device, block 2
1682                  3 = /dev/dasda3 First DASD device, block 3
1683                  4 = /dev/dasdb Second DASD device, major
1684                  5 = /dev/dasdb1 Second DASD device, block 1
1685                  6 = /dev/dasdb2 Second DASD device, block 2
1686                  7 = /dev/dasdb3 Second DASD device, block 3
1687                    ...
1688
1689 95 char        IP filter
1690                  0 = /dev/ipl          Filter control device/log file
1691                  1 = /dev/ipnat        NAT control device/log file
1692                  2 = /dev/ipstate      State information log file
1693                  3 = /dev/ipauth       Authentication control device/log file
1694                    ...
1695
1696 96 char        Parallel port ATAPI tape devices
1697                  0 = /dev/pt0          First parallel port ATAPI tape
1698                  1 = /dev/pt1          Second parallel port ATAPI tape
1699                    ...
1700                128 = /dev/npt0         First p.p. ATAPI tape, no rewind
1701                129 = /dev/npt1         Second p.p. ATAPI tape, no rewind
1702                    ...
1703
1704 96 block       Inverse NAND Flash Translation Layer
1705                  0 = /dev/inftla First INFTL layer
1706                 16 = /dev/inftlb Second INFTL layer
1707                    ...
1708                240 = /dev/inftlp       16th INTFL layer
1709
1710 97 char        Parallel port generic ATAPI interface
1711                  0 = /dev/pg0          First parallel port ATAPI device
1712                  1 = /dev/pg1          Second parallel port ATAPI device
1713                  2 = /dev/pg2          Third parallel port ATAPI device
1714                  3 = /dev/pg3          Fourth parallel port ATAPI device
1715
1716                These devices support the same API as the generic SCSI
1717                devices.
1718
1719 98 char        Control and Measurement Device (comedi)
1720                  0 = /dev/comedi0      First comedi device
1721                  1 = /dev/comedi1      Second comedi device
1722                    ...
1723
1724                See http://stm.lbl.gov/comedi or http://www.llp.fu-berlin.de/.
1725
1726 98 block       User-mode virtual block device
1727                  0 = /dev/ubda         First user-mode block device
1728                 16 = /dev/udbb         Second user-mode block device
1729                    ...
1730
1731                Partitions are handled in the same way as for IDE
1732                disks (see major number 3) except that the limit on
1733                partitions is 15.
1734
1735                This device is used by the user-mode virtual kernel port.
1736
1737 99 char        Raw parallel ports
1738                  0 = /dev/parport0     First parallel port
1739                  1 = /dev/parport1     Second parallel port
1740                    ...
1741
1742 99 block       JavaStation flash disk
1743                  0 = /dev/jsfd         JavaStation flash disk
1744
1745100 char        Telephony for Linux
1746                  0 = /dev/phone0       First telephony device
1747                  1 = /dev/phone1       Second telephony device
1748                    ...
1749
1750101 char        Motorola DSP 56xxx board
1751                  0 = /dev/mdspstat     Status information
1752                  1 = /dev/mdsp1        First DSP board I/O controls
1753                    ...
1754                 16 = /dev/mdsp16       16th DSP board I/O controls
1755
1756101 block       AMI HyperDisk RAID controller
1757                  0 = /dev/amiraid/ar0  First array whole disk
1758                 16 = /dev/amiraid/ar1  Second array whole disk
1759                    ...
1760                240 = /dev/amiraid/ar15 16th array whole disk
1761
1762                For each device, partitions are added as:
1763                  0 = /dev/amiraid/ar?    Whole disk
1764                  1 = /dev/amiraid/ar?p1  First partition
1765                  2 = /dev/amiraid/ar?p2  Second partition
1766                    ...
1767                 15 = /dev/amiraid/ar?p15 15th partition
1768
1769102 char
1770
1771102 block       Compressed block device
1772                  0 = /dev/cbd/a        First compressed block device, whole device
1773                 16 = /dev/cbd/b        Second compressed block device, whole device
1774                    ...
1775                240 = /dev/cbd/p        16th compressed block device, whole device
1776
1777                Partitions are handled in the same way as for IDE
1778                disks (see major number 3) except that the limit on
1779                partitions is 15.
1780
1781103 char        Arla network file system
1782                  0 = /dev/nnpfs0       First NNPFS device
1783                  1 = /dev/nnpfs1       Second NNPFS device
1784
1785                Arla is a free clone of the Andrew File System, AFS.
1786                The NNPFS device gives user mode filesystem
1787                implementations a kernel presence for caching and easy
1788                mounting.  For more information about the project,
1789                write to <arla-drinkers@stacken.kth.se> or see
1790                http://www.stacken.kth.se/project/arla/
1791
1792103 block       Audit device
1793                  0 = /dev/audit        Audit device
1794
1795104 char        Flash BIOS support
1796
1797104 block       Compaq Next Generation Drive Array, first controller
1798                  0 = /dev/cciss/c0d0   First logical drive, whole disk
1799                 16 = /dev/cciss/c0d1   Second logical drive, whole disk
1800                    ...
1801                240 = /dev/cciss/c0d15  16th logical drive, whole disk
1802
1803                Partitions are handled the same way as for Mylex
1804                DAC960 (see major number 48) except that the limit on
1805                partitions is 15.
1806
1807105 char        Comtrol VS-1000 serial controller
1808                  0 = /dev/ttyV0        First VS-1000 port
1809                  1 = /dev/ttyV1        Second VS-1000 port
1810                    ...
1811
1812105 block       Compaq Next Generation Drive Array, second controller
1813                  0 = /dev/cciss/c1d0   First logical drive, whole disk
1814                 16 = /dev/cciss/c1d1   Second logical drive, whole disk
1815                    ...
1816                240 = /dev/cciss/c1d15  16th logical drive, whole disk
1817
1818                Partitions are handled the same way as for Mylex
1819                DAC960 (see major number 48) except that the limit on
1820                partitions is 15.
1821
1822106 char        Comtrol VS-1000 serial controller - alternate devices
1823                  0 = /dev/cuv0         First VS-1000 port
1824                  1 = /dev/cuv1         Second VS-1000 port
1825                    ...
1826
1827106 block       Compaq Next Generation Drive Array, third controller
1828                  0 = /dev/cciss/c2d0   First logical drive, whole disk
1829                 16 = /dev/cciss/c2d1   Second logical drive, whole disk
1830                    ...
1831                240 = /dev/cciss/c2d15  16th logical drive, whole disk
1832
1833                Partitions are handled the same way as for Mylex
1834                DAC960 (see major number 48) except that the limit on
1835                partitions is 15.
1836
1837107 char        3Dfx Voodoo Graphics device
1838                  0 = /dev/3dfx         Primary 3Dfx graphics device
1839
1840107 block       Compaq Next Generation Drive Array, fourth controller
1841                  0 = /dev/cciss/c3d0   First logical drive, whole disk
1842                 16 = /dev/cciss/c3d1   Second logical drive, whole disk
1843                    ...
1844                240 = /dev/cciss/c3d15  16th logical drive, whole disk
1845
1846                Partitions are handled the same way as for Mylex
1847                DAC960 (see major number 48) except that the limit on
1848                partitions is 15.
1849
1850108 char        Device independent PPP interface
1851                  0 = /dev/ppp          Device independent PPP interface
1852
1853108 block       Compaq Next Generation Drive Array, fifth controller
1854                  0 = /dev/cciss/c4d0   First logical drive, whole disk
1855                 16 = /dev/cciss/c4d1   Second logical drive, whole disk
1856                    ...
1857                240 = /dev/cciss/c4d15  16th logical drive, whole disk
1858
1859                Partitions are handled the same way as for Mylex
1860                DAC960 (see major number 48) except that the limit on
1861                partitions is 15.
1862
1863109 char        Reserved for logical volume manager
1864
1865109 block       Compaq Next Generation Drive Array, sixth controller
1866                  0 = /dev/cciss/c5d0   First logical drive, whole disk
1867                 16 = /dev/cciss/c5d1   Second logical drive, whole disk
1868                    ...
1869                240 = /dev/cciss/c5d15  16th logical drive, whole disk
1870
1871                Partitions are handled the same way as for Mylex
1872                DAC960 (see major number 48) except that the limit on
1873                partitions is 15.
1874
1875110 char        miroMEDIA Surround board
1876                  0 = /dev/srnd0        First miroMEDIA Surround board
1877                  1 = /dev/srnd1        Second miroMEDIA Surround board
1878                    ...
1879
1880110 block       Compaq Next Generation Drive Array, seventh controller
1881                  0 = /dev/cciss/c6d0   First logical drive, whole disk
1882                 16 = /dev/cciss/c6d1   Second logical drive, whole disk
1883                    ...
1884                240 = /dev/cciss/c6d15  16th logical drive, whole disk
1885
1886                Partitions are handled the same way as for Mylex
1887                DAC960 (see major number 48) except that the limit on
1888                partitions is 15.
1889
1890111 char
1891
1892111 block       Compaq Next Generation Drive Array, eighth controller
1893                  0 = /dev/cciss/c7d0   First logical drive, whole disk
1894                 16 = /dev/cciss/c7d1   Second logical drive, whole disk
1895                    ...
1896                240 = /dev/cciss/c7d15  16th logical drive, whole disk
1897
1898                Partitions are handled the same way as for Mylex
1899                DAC960 (see major number 48) except that the limit on
1900                partitions is 15.
1901
1902112 char        ISI serial card
1903                  0 = /dev/ttyM0        First ISI port
1904                  1 = /dev/ttyM1        Second ISI port
1905                    ...
1906
1907                There is currently a device-naming conflict between
1908                these and PAM multimodems (major 78).
1909
1910112 block       IBM iSeries virtual disk
1911                  0 = /dev/iseries/vda  First virtual disk, whole disk
1912                  8 = /dev/iseries/vdb  Second virtual disk, whole disk
1913                    ...
1914                200 = /dev/iseries/vdz  26th virtual disk, whole disk
1915                208 = /dev/iseries/vdaa 27th virtual disk, whole disk
1916                    ...
1917                248 = /dev/iseries/vdaf 32nd virtual disk, whole disk
1918
1919                Partitions are handled in the same way as for IDE
1920                disks (see major number 3) except that the limit on
1921                partitions is 7.
1922
1923113 char        ISI serial card - alternate devices
1924                  0 = /dev/cum0         Callout device for ttyM0
1925                  1 = /dev/cum1         Callout device for ttyM1
1926                    ...
1927
1928113 block       IBM iSeries virtual CD-ROM
1929                  0 = /dev/iseries/vcda First virtual CD-ROM
1930                  1 = /dev/iseries/vcdb Second virtual CD-ROM
1931                    ...
1932
1933114 char        Picture Elements ISE board
1934                  0 = /dev/ise0         First ISE board
1935                  1 = /dev/ise1         Second ISE board
1936                    ...
1937                128 = /dev/isex0        Control node for first ISE board
1938                129 = /dev/isex1        Control node for second ISE board
1939                    ...
1940
1941                The ISE board is an embedded computer, optimized for
1942                image processing. The /dev/iseN nodes are the general
1943                I/O access to the board, the /dev/isex0 nodes command
1944                nodes used to control the board.
1945
1946114 block       IDE BIOS powered software RAID interfaces such as the
1947                Promise Fastrak
1948
1949                  0 = /dev/ataraid/d0
1950                  1 = /dev/ataraid/d0p1
1951                  2 = /dev/ataraid/d0p2
1952                  ...
1953                 16 = /dev/ataraid/d1
1954                 17 = /dev/ataraid/d1p1
1955                 18 = /dev/ataraid/d1p2
1956                  ...
1957                255 = /dev/ataraid/d15p15
1958
1959                Partitions are handled in the same way as for IDE
1960                disks (see major number 3) except that the limit on
1961                partitions is 15.
1962
1963115 char        TI link cable devices (115 was formerly the console driver speaker)
1964                  0 = /dev/tipar0    Parallel cable on first parallel port
1965                  ...
1966                  7 = /dev/tipar7    Parallel cable on seventh parallel port
1967
1968                  8 = /dev/tiser0    Serial cable on first serial port
1969                  ...
1970                 15 = /dev/tiser7    Serial cable on seventh serial port
1971
1972                 16 = /dev/tiusb0    First USB cable
1973                  ...
1974                 47 = /dev/tiusb31   32nd USB cable
1975
1976115 block       NetWare (NWFS) Devices (0-255)
1977
1978                The NWFS (NetWare) devices are used to present a
1979                collection of NetWare Mirror Groups or NetWare
1980                Partitions as a logical storage segment for
1981                use in mounting NetWare volumes.  A maximum of
1982                256 NetWare volumes can be supported in a single
1983                machine.
1984
1985                http://www.kernel.org/pub/linux/kernel/people/jmerkey/nwfs
1986
1987                0 = /dev/nwfs/v0    First NetWare (NWFS) Logical Volume
1988                1 = /dev/nwfs/v1    Second NetWare (NWFS) Logical Volume
1989                2 = /dev/nwfs/v2    Third NetWare (NWFS) Logical Volume
1990                      ...
1991                255 = /dev/nwfs/v255    Last NetWare (NWFS) Logical Volume
1992
1993116 char        Advanced Linux Sound Driver (ALSA)
1994
1995116 block       MicroMemory battery backed RAM adapter (NVRAM)
1996                Supports 16 boards, 15 partitions each.
1997                Requested by neilb at cse.unsw.edu.au.
1998
1999                 0 = /dev/umem/d0      Whole of first board
2000                 1 = /dev/umem/d0p1    First partition of first board
2001                 2 = /dev/umem/d0p2    Second partition of first board
2002                15 = /dev/umem/d0p15   15th partition of first board
2003
2004                16 = /dev/umem/d1      Whole of second board
2005                17 = /dev/umem/d1p1    First partition of second board
2006                    ...
2007                255= /dev/umem/d15p15  15th partition of 16th board.
2008
2009117 char        COSA/SRP synchronous serial card
2010                  0 = /dev/cosa0c0      1st board, 1st channel
2011                  1 = /dev/cosa0c1      1st board, 2nd channel
2012                    ...
2013                 16 = /dev/cosa1c0      2nd board, 1st channel
2014                 17 = /dev/cosa1c1      2nd board, 2nd channel
2015                    ...
2016
2017117 block       Enterprise Volume Management System (EVMS)
2018
2019                The EVMS driver uses a layered, plug-in model to provide
2020                unparalleled flexibility and extensibility in managing
2021                storage.  This allows for easy expansion or customization
2022                of various levels of volume management.  Requested by
2023                Mark Peloquin (peloquin at us.ibm.com).
2024
2025                Note: EVMS populates and manages all the devnodes in
2026                /dev/evms.
2027
2028                http://sf.net/projects/evms
2029
2030                  0 = /dev/evms/block_device   EVMS block device
2031                  1 = /dev/evms/legacyname1    First EVMS legacy device
2032                  2 = /dev/evms/legacyname2    Second EVMS legacy device
2033                    ...
2034                    Both ranges can grow (down or up) until they meet.
2035                    ...
2036                254 = /dev/evms/EVMSname2      Second EVMS native device
2037                255 = /dev/evms/EVMSname1      First EVMS native device
2038
2039                Note: legacyname(s) are derived from the normal legacy
2040                device names.  For example, /dev/hda5 would become
2041                /dev/evms/hda5.
2042
2043118 char        IBM Cryptographic Accelerator
2044                  0 = /dev/ica  Virtual interface to all IBM Crypto Accelerators
2045                  1 = /dev/ica0 IBMCA Device 0
2046                  2 = /dev/ica1 IBMCA Device 1
2047                    ...
2048
2049119 char        VMware virtual network control
2050                  0 = /dev/vnet0        1st virtual network
2051                  1 = /dev/vnet1        2nd virtual network
2052                    ...
2053
2054120-127 char    LOCAL/EXPERIMENTAL USE
2055
2056120-127 block   LOCAL/EXPERIMENTAL USE
2057                Allocated for local/experimental use.  For devices not
2058                assigned official numbers, these ranges should be
2059                used in order to avoid conflicting with future assignments.
2060
2061128-135 char    Unix98 PTY masters
2062
2063                These devices should not have corresponding device
2064                nodes; instead they should be accessed through the
2065                /dev/ptmx cloning interface.
2066
2067128 block       SCSI disk devices (128-143)
2068                  0 = /dev/sddy         129th SCSI disk whole disk
2069                 16 = /dev/sddz         130th SCSI disk whole disk
2070                 32 = /dev/sdea         131th SCSI disk whole disk
2071                    ...
2072                240 = /dev/sden         144th SCSI disk whole disk
2073
2074                Partitions are handled in the same way as for IDE
2075                disks (see major number 3) except that the limit on
2076                partitions is 15.
2077
2078129 block       SCSI disk devices (144-159)
2079                  0 = /dev/sdeo         145th SCSI disk whole disk
2080                 16 = /dev/sdep         146th SCSI disk whole disk
2081                 32 = /dev/sdeq         147th SCSI disk whole disk
2082                    ...
2083                240 = /dev/sdfd         160th SCSI disk whole disk
2084
2085                Partitions are handled in the same way as for IDE
2086                disks (see major number 3) except that the limit on
2087                partitions is 15.
2088
2089130 char        (Misc devices)
2090
2091130 block       SCSI disk devices (160-175)
2092                  0 = /dev/sdfe         161st SCSI disk whole disk
2093                 16 = /dev/sdff         162nd SCSI disk whole disk
2094                 32 = /dev/sdfg         163rd SCSI disk whole disk
2095                    ...
2096                240 = /dev/sdft         176th SCSI disk whole disk
2097
2098                Partitions are handled in the same way as for IDE
2099                disks (see major number 3) except that the limit on
2100                partitions is 15.
2101
2102131 block       SCSI disk devices (176-191)
2103                  0 = /dev/sdfu         177th SCSI disk whole disk
2104                 16 = /dev/sdfv         178th SCSI disk whole disk
2105                 32 = /dev/sdfw         179th SCSI disk whole disk
2106                    ...
2107                240 = /dev/sdgj         192nd SCSI disk whole disk
2108
2109                Partitions are handled in the same way as for IDE
2110                disks (see major number 3) except that the limit on
2111                partitions is 15.
2112
2113132 block       SCSI disk devices (192-207)
2114                  0 = /dev/sdgk         193rd SCSI disk whole disk
2115                 16 = /dev/sdgl         194th SCSI disk whole disk
2116                 32 = /dev/sdgm         195th SCSI disk whole disk
2117                    ...
2118                240 = /dev/sdgz         208th SCSI disk whole disk
2119
2120                Partitions are handled in the same way as for IDE
2121                disks (see major number 3) except that the limit on
2122                partitions is 15.
2123
2124133 block       SCSI disk devices (208-223)
2125                  0 = /dev/sdha         209th SCSI disk whole disk
2126                 16 = /dev/sdhb         210th SCSI disk whole disk
2127                 32 = /dev/sdhc         211th SCSI disk whole disk
2128                    ...
2129                240 = /dev/sdhp         224th SCSI disk whole disk
2130
2131                Partitions are handled in the same way as for IDE
2132                disks (see major number 3) except that the limit on
2133                partitions is 15.
2134
2135134 block       SCSI disk devices (224-239)
2136                  0 = /dev/sdhq         225th SCSI disk whole disk
2137                 16 = /dev/sdhr         226th SCSI disk whole disk
2138                 32 = /dev/sdhs         227th SCSI disk whole disk
2139                    ...
2140                240 = /dev/sdif         240th SCSI disk whole disk
2141
2142                Partitions are handled in the same way as for IDE
2143                disks (see major number 3) except that the limit on
2144                partitions is 15.
2145
2146135 block       SCSI disk devices (240-255)
2147                  0 = /dev/sdig         241st SCSI disk whole disk
2148                 16 = /dev/sdih         242nd SCSI disk whole disk
2149                 32 = /dev/sdih         243rd SCSI disk whole disk
2150                    ...
2151                240 = /dev/sdiv         256th SCSI disk whole disk
2152
2153                Partitions are handled in the same way as for IDE
2154                disks (see major number 3) except that the limit on
2155                partitions is 15.
2156
2157136-143 char    Unix98 PTY slaves
2158                  0 = /dev/pts/0        First Unix98 pseudo-TTY
2159                  1 = /dev/pts/1        Second Unix98 pseudo-TTY
2160                    ...
2161
2162                These device nodes are automatically generated with
2163                the proper permissions and modes by mounting the
2164                devpts filesystem onto /dev/pts with the appropriate
2165                mount options (distribution dependent, however, on
2166                *most* distributions the appropriate options are
2167                "mode=0620,gid=<gid of the "tty" group>".)
2168
2169136 block       Mylex DAC960 PCI RAID controller; ninth controller
2170                  0 = /dev/rd/c8d0      First disk, whole disk
2171                  8 = /dev/rd/c8d1      Second disk, whole disk
2172                    ...
2173                248 = /dev/rd/c8d31     32nd disk, whole disk
2174
2175                Partitions are handled as for major 48.
2176
2177137 block       Mylex DAC960 PCI RAID controller; tenth controller
2178                  0 = /dev/rd/c9d0      First disk, whole disk
2179                  8 = /dev/rd/c9d1      Second disk, whole disk
2180                    ...
2181                248 = /dev/rd/c9d31     32nd disk, whole disk
2182
2183                Partitions are handled as for major 48.
2184
2185138 block       Mylex DAC960 PCI RAID controller; eleventh controller
2186                  0 = /dev/rd/c10d0     First disk, whole disk
2187                  8 = /dev/rd/c10d1     Second disk, whole disk
2188                    ...
2189                248 = /dev/rd/c10d31    32nd disk, whole disk
2190
2191                Partitions are handled as for major 48.
2192
2193139 block       Mylex DAC960 PCI RAID controller; twelfth controller
2194                  0 = /dev/rd/c11d0     First disk, whole disk
2195                  8 = /dev/rd/c11d1     Second disk, whole disk
2196                    ...
2197                248 = /dev/rd/c11d31    32nd disk, whole disk
2198
2199                Partitions are handled as for major 48.
2200
2201140 block       Mylex DAC960 PCI RAID controller; thirteenth controller
2202                  0 = /dev/rd/c12d0     First disk, whole disk
2203                  8 = /dev/rd/c12d1     Second disk, whole disk
2204                    ...
2205                248 = /dev/rd/c12d31    32nd disk, whole disk
2206
2207                Partitions are handled as for major 48.
2208
2209141 block       Mylex DAC960 PCI RAID controller; fourteenth controller
2210                  0 = /dev/rd/c13d0     First disk, whole disk
2211                  8 = /dev/rd/c13d1     Second disk, whole disk
2212                    ...
2213                248 = /dev/rd/c13d31    32nd disk, whole disk
2214
2215                Partitions are handled as for major 48.
2216
2217142 block       Mylex DAC960 PCI RAID controller; fifteenth controller
2218                  0 = /dev/rd/c14d0     First disk, whole disk
2219                  8 = /dev/rd/c14d1     Second disk, whole disk
2220                    ...
2221                248 = /dev/rd/c14d31    32nd disk, whole disk
2222
2223                Partitions are handled as for major 48.
2224
2225143 block       Mylex DAC960 PCI RAID controller; sixteenth controller
2226                  0 = /dev/rd/c15d0     First disk, whole disk
2227                  8 = /dev/rd/c15d1     Second disk, whole disk
2228                    ...
2229                248 = /dev/rd/c15d31    32nd disk, whole disk
2230
2231                Partitions are handled as for major 48.
2232
2233144 char        Encapsulated PPP
2234                  0 = /dev/pppox0       First PPP over Ethernet
2235                    ...
2236                 63 = /dev/pppox63      64th PPP over Ethernet
2237
2238                This is primarily used for ADSL.
2239
2240                The SST 5136-DN DeviceNet interface driver has been
2241                relocated to major 183 due to an unfortunate conflict.
2242
2243144 block       Expansion Area #1 for more non-device (e.g. NFS) mounts
2244                  0 = mounted device 256
2245                255 = mounted device 511
2246
2247145 char        SAM9407-based soundcard
2248                  0 = /dev/sam0_mixer
2249                  1 = /dev/sam0_sequencer
2250                  2 = /dev/sam0_midi00
2251                  3 = /dev/sam0_dsp
2252                  4 = /dev/sam0_audio
2253                  6 = /dev/sam0_sndstat
2254                 18 = /dev/sam0_midi01
2255                 34 = /dev/sam0_midi02
2256                 50 = /dev/sam0_midi03
2257                 64 = /dev/sam1_mixer
2258                    ...
2259                128 = /dev/sam2_mixer
2260                    ...
2261                192 = /dev/sam3_mixer
2262                    ...
2263
2264                Device functions match OSS, but offer a number of
2265                addons, which are sam9407 specific.  OSS can be
2266                operated simultaneously, taking care of the codec.
2267
2268145 block       Expansion Area #2 for more non-device (e.g. NFS) mounts
2269                  0 = mounted device 512
2270                255 = mounted device 767
2271
2272146 char        SYSTRAM SCRAMNet mirrored-memory network
2273                  0 = /dev/scramnet0    First SCRAMNet device
2274                  1 = /dev/scramnet1    Second SCRAMNet device
2275                    ...
2276
2277146 block       Expansion Area #3 for more non-device (e.g. NFS) mounts
2278                  0 = mounted device 768
2279                255 = mounted device 1023
2280
2281147 char        Aureal Semiconductor Vortex Audio device
2282                  0 = /dev/aureal0      First Aureal Vortex
2283                  1 = /dev/aureal1      Second Aureal Vortex
2284                    ...
2285
2286147 block       Distributed Replicated Block Device (DRBD)
2287                  0 = /dev/drbd0        First DRBD device
2288                  1 = /dev/drbd1        Second DRBD device
2289                    ...
2290
2291148 char        Technology Concepts serial card
2292                  0 = /dev/ttyT0        First TCL port
2293                  1 = /dev/ttyT1        Second TCL port
2294                    ...
2295
2296149 char        Technology Concepts serial card - alternate devices
2297                  0 = /dev/cut0         Callout device for ttyT0
2298                  1 = /dev/cut0         Callout device for ttyT1
2299                    ...
2300
2301150 char        Real-Time Linux FIFOs
2302                  0 = /dev/rtf0         First RTLinux FIFO
2303                  1 = /dev/rtf1         Second RTLinux FIFO
2304                    ...
2305
2306151 char        DPT I2O SmartRaid V controller
2307                  0 = /dev/dpti0        First DPT I2O adapter
2308                  1 = /dev/dpti1        Second DPT I2O adapter
2309                    ...
2310
2311152 char        EtherDrive Control Device
2312                  0 = /dev/etherd/ctl   Connect/Disconnect an EtherDrive
2313                  1 = /dev/etherd/err   Monitor errors
2314                  2 = /dev/etherd/raw   Raw AoE packet monitor
2315
2316152 block       EtherDrive Block Devices
2317                  0 = /dev/etherd/0     EtherDrive 0
2318                    ...
2319                255 = /dev/etherd/255   EtherDrive 255
2320
2321153 char        SPI Bus Interface (sometimes referred to as MicroWire)
2322                  0 = /dev/spi0         First SPI device on the bus
2323                  1 = /dev/spi1         Second SPI device on the bus
2324                    ...
2325                 15 = /dev/spi15        Sixteenth SPI device on the bus
2326
2327153 block       Enhanced Metadisk RAID (EMD) storage units
2328                  0 = /dev/emd/0        First unit
2329                  1 = /dev/emd/0p1      Partition 1 on First unit
2330                  2 = /dev/emd/0p2      Partition 2 on First unit
2331                    ...
2332                 15 = /dev/emd/0p15     Partition 15 on First unit
2333
2334                 16 = /dev/emd/1        Second unit
2335                 32 = /dev/emd/2        Third unit
2336                    ...
2337                240 = /dev/emd/15       Sixteenth unit
2338
2339                Partitions are handled in the same way as for IDE
2340                disks (see major number 3) except that the limit on
2341                partitions is 15.
2342
2343154 char        Specialix RIO serial card
2344                  0 = /dev/ttySR0       First RIO port
2345                    ...
2346                255 = /dev/ttySR255     256th RIO port
2347
2348155 char        Specialix RIO serial card - alternate devices
2349                  0 = /dev/cusr0        Callout device for ttySR0
2350                    ...
2351                255 = /dev/cusr255      Callout device for ttySR255
2352
2353156 char        Specialix RIO serial card
2354                  0 = /dev/ttySR256     257th RIO port
2355                    ...
2356                255 = /dev/ttySR511     512th RIO port
2357
2358157 char        Specialix RIO serial card - alternate devices
2359                  0 = /dev/cusr256      Callout device for ttySR256
2360                    ...
2361                255 = /dev/cusr511      Callout device for ttySR511
2362
2363158 char        Dialogic GammaLink fax driver
2364                  0 = /dev/gfax0        GammaLink channel 0
2365                  1 = /dev/gfax1        GammaLink channel 1
2366                    ...
2367
2368159 char        RESERVED
2369
2370159 block       RESERVED
2371
2372160 char        General Purpose Instrument Bus (GPIB)
2373                  0 = /dev/gpib0        First GPIB bus
2374                  1 = /dev/gpib1        Second GPIB bus
2375                    ...
2376
2377160 block       Carmel 8-port SATA Disks on First Controller
2378                  0 = /dev/carmel/0     SATA disk 0 whole disk
2379                  1 = /dev/carmel/0p1   SATA disk 0 partition 1
2380                    ...
2381                 31 = /dev/carmel/0p31  SATA disk 0 partition 31
2382
2383                 32 = /dev/carmel/1     SATA disk 1 whole disk
2384                 64 = /dev/carmel/2     SATA disk 2 whole disk
2385                    ...
2386                224 = /dev/carmel/7     SATA disk 7 whole disk
2387
2388                Partitions are handled in the same way as for IDE
2389                disks (see major number 3) except that the limit on
2390                partitions is 31.
2391
2392161 char        IrCOMM devices (IrDA serial/parallel emulation)
2393                  0 = /dev/ircomm0      First IrCOMM device
2394                  1 = /dev/ircomm1      Second IrCOMM device
2395                    ...
2396                 16 = /dev/irlpt0       First IrLPT device
2397                 17 = /dev/irlpt1       Second IrLPT device
2398                    ...
2399
2400161 block       Carmel 8-port SATA Disks on Second Controller
2401                  0 = /dev/carmel/8     SATA disk 8 whole disk
2402                  1 = /dev/carmel/8p1   SATA disk 8 partition 1
2403                    ...
2404                 31 = /dev/carmel/8p31  SATA disk 8 partition 31
2405
2406                 32 = /dev/carmel/9     SATA disk 9 whole disk
2407                 64 = /dev/carmel/10    SATA disk 10 whole disk
2408                    ...
2409                224 = /dev/carmel/15    SATA disk 15 whole disk
2410
2411                Partitions are handled in the same way as for IDE
2412                disks (see major number 3) except that the limit on
2413                partitions is 31.
2414
2415162 char        Raw block device interface
2416                  0 = /dev/rawctl       Raw I/O control device
2417                  1 = /dev/raw/raw1     First raw I/O device
2418                  2 = /dev/raw/raw2     Second raw I/O device
2419                    ...
2420
2421163 char
2422
2423164 char        Chase Research AT/PCI-Fast serial card
2424                  0 = /dev/ttyCH0       AT/PCI-Fast board 0, port 0
2425                    ...
2426                 15 = /dev/ttyCH15      AT/PCI-Fast board 0, port 15
2427                 16 = /dev/ttyCH16      AT/PCI-Fast board 1, port 0
2428                    ...
2429                 31 = /dev/ttyCH31      AT/PCI-Fast board 1, port 15
2430                 32 = /dev/ttyCH32      AT/PCI-Fast board 2, port 0
2431                    ...
2432                 47 = /dev/ttyCH47      AT/PCI-Fast board 2, port 15
2433                 48 = /dev/ttyCH48      AT/PCI-Fast board 3, port 0
2434                    ...
2435                 63 = /dev/ttyCH63      AT/PCI-Fast board 3, port 15
2436
2437165 char        Chase Research AT/PCI-Fast serial card - alternate devices
2438                  0 = /dev/cuch0        Callout device for ttyCH0
2439                    ...
2440                 63 = /dev/cuch63       Callout device for ttyCH63
2441
2442166 char        ACM USB modems
2443                  0 = /dev/ttyACM0      First ACM modem
2444                  1 = /dev/ttyACM1      Second ACM modem
2445                    ...
2446
2447167 char        ACM USB modems - alternate devices
2448                  0 = /dev/cuacm0       Callout device for ttyACM0
2449                  1 = /dev/cuacm1       Callout device for ttyACM1
2450                    ...
2451
2452168 char        Eracom CSA7000 PCI encryption adaptor
2453                  0 = /dev/ecsa0        First CSA7000
2454                  1 = /dev/ecsa1        Second CSA7000
2455                    ...
2456
2457169 char        Eracom CSA8000 PCI encryption adaptor
2458                  0 = /dev/ecsa8-0      First CSA8000
2459                  1 = /dev/ecsa8-1      Second CSA8000
2460                    ...
2461
2462170 char        AMI MegaRAC remote access controller
2463                  0 = /dev/megarac0     First MegaRAC card
2464                  1 = /dev/megarac1     Second MegaRAC card
2465                    ...
2466
2467171 char        Reserved for IEEE 1394 (Firewire)
2468
2469172 char        Moxa Intellio serial card
2470                  0 = /dev/ttyMX0       First Moxa port
2471                  1 = /dev/ttyMX1       Second Moxa port
2472                    ...
2473                127 = /dev/ttyMX127     128th Moxa port
2474                128 = /dev/moxactl      Moxa control port
2475
2476173 char        Moxa Intellio serial card - alternate devices
2477                  0 = /dev/cumx0        Callout device for ttyMX0
2478                  1 = /dev/cumx1        Callout device for ttyMX1
2479                    ...
2480                127 = /dev/cumx127      Callout device for ttyMX127
2481
2482174 char        SmartIO serial card
2483                  0 = /dev/ttySI0       First SmartIO port
2484                  1 = /dev/ttySI1       Second SmartIO port
2485                    ...
2486
2487175 char        SmartIO serial card - alternate devices
2488                  0 = /dev/cusi0        Callout device for ttySI0
2489                  1 = /dev/cusi1        Callout device for ttySI1
2490                    ...
2491
2492176 char        nCipher nFast PCI crypto accelerator
2493                  0 = /dev/nfastpci0    First nFast PCI device
2494                  1 = /dev/nfastpci1    First nFast PCI device
2495                    ...
2496
2497177 char        TI PCILynx memory spaces
2498                  0 = /dev/pcilynx/aux0  AUX space of first PCILynx card
2499                    ...
2500                 15 = /dev/pcilynx/aux15 AUX space of 16th PCILynx card
2501                 16 = /dev/pcilynx/rom0  ROM space of first PCILynx card
2502                    ...
2503                 31 = /dev/pcilynx/rom15 ROM space of 16th PCILynx card
2504                 32 = /dev/pcilynx/ram0  RAM space of first PCILynx card
2505                    ...
2506                 47 = /dev/pcilynx/ram15 RAM space of 16th PCILynx card
2507
2508178 char        Giganet cLAN1xxx virtual interface adapter
2509                  0 = /dev/clanvi0      First cLAN adapter
2510                  1 = /dev/clanvi1      Second cLAN adapter
2511                    ...
2512
2513179 block       MMC block devices
2514                  0 = /dev/mmcblk0      First SD/MMC card
2515                  1 = /dev/mmcblk0p1    First partition on first MMC card
2516                  8 = /dev/mmcblk1      Second SD/MMC card
2517                    ...
2518
2519179 char        CCube DVXChip-based PCI products
2520                  0 = /dev/dvxirq0      First DVX device
2521                  1 = /dev/dvxirq1      Second DVX device
2522                    ...
2523
2524180 char        USB devices
2525                  0 = /dev/usb/lp0      First USB printer
2526                    ...
2527                 15 = /dev/usb/lp15     16th USB printer
2528                 48 = /dev/usb/scanner0 First USB scanner
2529                    ...
2530                 63 = /dev/usb/scanner15 16th USB scanner
2531                 64 = /dev/usb/rio500   Diamond Rio 500
2532                 65 = /dev/usb/usblcd   USBLCD Interface (info@usblcd.de)
2533                 66 = /dev/usb/cpad0    Synaptics cPad (mouse/LCD)
2534                 96 = /dev/usb/hiddev0  1st USB HID device
2535                    ...
2536                111 = /dev/usb/hiddev15 16th USB HID device
2537                112 = /dev/usb/auer0    1st auerswald ISDN device
2538                    ...
2539                127 = /dev/usb/auer15   16th auerswald ISDN device
2540                128 = /dev/usb/brlvgr0  First Braille Voyager device
2541                    ...
2542                131 = /dev/usb/brlvgr3  Fourth Braille Voyager device
2543                132 = /dev/usb/idmouse  ID Mouse (fingerprint scanner) device
2544                133 = /dev/usb/sisusbvga1       First SiSUSB VGA device
2545                    ...
2546                140 = /dev/usb/sisusbvga8       Eighth SISUSB VGA device
2547                144 = /dev/usb/lcd      USB LCD device
2548                160 = /dev/usb/legousbtower0    1st USB Legotower device
2549                    ...
2550                175 = /dev/usb/legousbtower15   16th USB Legotower device
2551                176 = /dev/usb/usbtmc1  First USB TMC device
2552                   ...
2553                192 = /dev/usb/usbtmc16 16th USB TMC device
2554                240 = /dev/usb/dabusb0  First daubusb device
2555                    ...
2556                243 = /dev/usb/dabusb3  Fourth dabusb device
2557
2558180 block       USB block devices
2559                  0 = /dev/uba          First USB block device
2560                  8 = /dev/ubb          Second USB block device
2561                 16 = /dev/ubc          Third USB block device
2562                    ...
2563
2564181 char        Conrad Electronic parallel port radio clocks
2565                  0 = /dev/pcfclock0    First Conrad radio clock
2566                  1 = /dev/pcfclock1    Second Conrad radio clock
2567                    ...
2568
2569182 char        Picture Elements THR2 binarizer
2570                  0 = /dev/pethr0       First THR2 board
2571                  1 = /dev/pethr1       Second THR2 board
2572                    ...
2573
2574183 char        SST 5136-DN DeviceNet interface
2575                  0 = /dev/ss5136dn0    First DeviceNet interface
2576                  1 = /dev/ss5136dn1    Second DeviceNet interface
2577                    ...
2578
2579                This device used to be assigned to major number 144.
2580                It had to be moved due to an unfortunate conflict.
2581
2582184 char        Picture Elements' video simulator/sender
2583                  0 = /dev/pevss0       First sender board
2584                  1 = /dev/pevss1       Second sender board
2585                    ...
2586
2587185 char        InterMezzo high availability file system
2588                  0 = /dev/intermezzo0  First cache manager
2589                  1 = /dev/intermezzo1  Second cache manager
2590                    ...
2591
2592                See http://www.inter-mezzo.org/ for more information.
2593
2594186 char        Object-based storage control device
2595                  0 = /dev/obd0         First obd control device
2596                  1 = /dev/obd1         Second obd control device
2597                    ...
2598
2599                See ftp://ftp.lustre.org/pub/obd for code and information.
2600
2601187 char        DESkey hardware encryption device
2602                  0 = /dev/deskey0      First DES key
2603                  1 = /dev/deskey1      Second DES key
2604                    ...
2605
2606188 char        USB serial converters
2607                  0 = /dev/ttyUSB0      First USB serial converter
2608                  1 = /dev/ttyUSB1      Second USB serial converter
2609                    ...
2610
2611189 char        USB serial converters - alternate devices
2612                  0 = /dev/cuusb0       Callout device for ttyUSB0
2613                  1 = /dev/cuusb1       Callout device for ttyUSB1
2614                    ...
2615
2616190 char        Kansas City tracker/tuner card
2617                  0 = /dev/kctt0        First KCT/T card
2618                  1 = /dev/kctt1        Second KCT/T card
2619                    ...
2620
2621191 char        Reserved for PCMCIA
2622
2623192 char        Kernel profiling interface
2624                  0 = /dev/profile      Profiling control device
2625                  1 = /dev/profile0     Profiling device for CPU 0
2626                  2 = /dev/profile1     Profiling device for CPU 1
2627                    ...
2628
2629193 char        Kernel event-tracing interface
2630                  0 = /dev/trace        Tracing control device
2631                  1 = /dev/trace0       Tracing device for CPU 0
2632                  2 = /dev/trace1       Tracing device for CPU 1
2633                    ...
2634
2635194 char        linVideoStreams (LINVS)
2636                  0 = /dev/mvideo/status0       Video compression status
2637                  1 = /dev/mvideo/stream0       Video stream
2638                  2 = /dev/mvideo/frame0        Single compressed frame
2639                  3 = /dev/mvideo/rawframe0     Raw uncompressed frame
2640                  4 = /dev/mvideo/codec0        Direct codec access
2641                  5 = /dev/mvideo/video4linux0  Video4Linux compatibility
2642
2643                 16 = /dev/mvideo/status1       Second device
2644                    ...
2645                 32 = /dev/mvideo/status2       Third device
2646                    ...
2647                    ...
2648                240 = /dev/mvideo/status15      16th device
2649                    ...
2650
2651195 char        Nvidia graphics devices
2652                  0 = /dev/nvidia0              First Nvidia card
2653                  1 = /dev/nvidia1              Second Nvidia card
2654                    ...
2655                255 = /dev/nvidiactl            Nvidia card control device
2656
2657196 char        Tormenta T1 card
2658                  0 = /dev/tor/0                Master control channel for all cards
2659                  1 = /dev/tor/1                First DS0
2660                  2 = /dev/tor/2                Second DS0
2661                    ...
2662                 48 = /dev/tor/48               48th DS0
2663                 49 = /dev/tor/49               First pseudo-channel
2664                 50 = /dev/tor/50               Second pseudo-channel
2665                    ...
2666
2667197 char        OpenTNF tracing facility
2668                  0 = /dev/tnf/t0               Trace 0 data extraction
2669                  1 = /dev/tnf/t1               Trace 1 data extraction
2670                    ...
2671                128 = /dev/tnf/status           Tracing facility status
2672                130 = /dev/tnf/trace            Tracing device
2673
2674198 char        Total Impact TPMP2 quad coprocessor PCI card
2675                  0 = /dev/tpmp2/0              First card
2676                  1 = /dev/tpmp2/1              Second card
2677                    ...
2678
2679199 char        Veritas volume manager (VxVM) volumes
2680                  0 = /dev/vx/rdsk/*/*          First volume
2681                  1 = /dev/vx/rdsk/*/*          Second volume
2682                    ...
2683
2684199 block       Veritas volume manager (VxVM) volumes
2685                  0 = /dev/vx/dsk/*/*           First volume
2686                  1 = /dev/vx/dsk/*/*           Second volume
2687                    ...
2688
2689                The namespace in these directories is maintained by
2690                the user space VxVM software.
2691
2692200 char        Veritas VxVM configuration interface
2693                  0 = /dev/vx/config            Configuration access node
2694                  1 = /dev/vx/trace             Volume i/o trace access node
2695                  2 = /dev/vx/iod               Volume i/o daemon access node
2696                  3 = /dev/vx/info              Volume information access node
2697                  4 = /dev/vx/task              Volume tasks access node
2698                  5 = /dev/vx/taskmon           Volume tasks monitor daemon
2699
2700201 char        Veritas VxVM dynamic multipathing driver
2701                  0 = /dev/vx/rdmp/*            First multipath device
2702                  1 = /dev/vx/rdmp/*            Second multipath device
2703                    ...
2704201 block       Veritas VxVM dynamic multipathing driver
2705                  0 = /dev/vx/dmp/*             First multipath device
2706                  1 = /dev/vx/dmp/*             Second multipath device
2707                    ...
2708
2709                The namespace in these directories is maintained by
2710                the user space VxVM software.
2711
2712202 char        CPU model-specific registers
2713                  0 = /dev/cpu/0/msr            MSRs on CPU 0
2714                  1 = /dev/cpu/1/msr            MSRs on CPU 1
2715                    ...
2716
2717202 block       Xen Virtual Block Device
2718                  0 = /dev/xvda       First Xen VBD whole disk
2719                  16 = /dev/xvdb      Second Xen VBD whole disk
2720                  32 = /dev/xvdc      Third Xen VBD whole disk
2721                    ...
2722                  240 = /dev/xvdp     Sixteenth Xen VBD whole disk
2723
2724                Partitions are handled in the same way as for IDE
2725                disks (see major number 3) except that the limit on
2726                partitions is 15.
2727
2728203 char        CPU CPUID information
2729                  0 = /dev/cpu/0/cpuid          CPUID on CPU 0
2730                  1 = /dev/cpu/1/cpuid          CPUID on CPU 1
2731                    ...
2732
2733204 char        Low-density serial ports
2734                  0 = /dev/ttyLU0               LinkUp Systems L72xx UART - port 0
2735                  1 = /dev/ttyLU1               LinkUp Systems L72xx UART - port 1
2736                  2 = /dev/ttyLU2               LinkUp Systems L72xx UART - port 2
2737                  3 = /dev/ttyLU3               LinkUp Systems L72xx UART - port 3
2738                  4 = /dev/ttyFB0               Intel Footbridge (ARM)
2739                  5 = /dev/ttySA0               StrongARM builtin serial port 0
2740                  6 = /dev/ttySA1               StrongARM builtin serial port 1
2741                  7 = /dev/ttySA2               StrongARM builtin serial port 2
2742                  8 = /dev/ttySC0               SCI serial port (SuperH) - port 0
2743                  9 = /dev/ttySC1               SCI serial port (SuperH) - port 1
2744                 10 = /dev/ttySC2               SCI serial port (SuperH) - port 2
2745                 11 = /dev/ttySC3               SCI serial port (SuperH) - port 3
2746                 12 = /dev/ttyFW0               Firmware console - port 0
2747                 13 = /dev/ttyFW1               Firmware console - port 1
2748                 14 = /dev/ttyFW2               Firmware console - port 2
2749                 15 = /dev/ttyFW3               Firmware console - port 3
2750                 16 = /dev/ttyAM0               ARM "AMBA" serial port 0
2751                    ...
2752                 31 = /dev/ttyAM15              ARM "AMBA" serial port 15
2753                 32 = /dev/ttyDB0               DataBooster serial port 0
2754                    ...
2755                 39 = /dev/ttyDB7               DataBooster serial port 7
2756                 40 = /dev/ttySG0               SGI Altix console port
2757                 41 = /dev/ttySMX0              Motorola i.MX - port 0
2758                 42 = /dev/ttySMX1              Motorola i.MX - port 1
2759                 43 = /dev/ttySMX2              Motorola i.MX - port 2
2760                 44 = /dev/ttyMM0               Marvell MPSC - port 0
2761                 45 = /dev/ttyMM1               Marvell MPSC - port 1
2762                 46 = /dev/ttyCPM0              PPC CPM (SCC or SMC) - port 0
2763                    ...
2764                 47 = /dev/ttyCPM5              PPC CPM (SCC or SMC) - port 5
2765                 50 = /dev/ttyIOC0              Altix serial card
2766                    ...
2767                 81 = /dev/ttyIOC31             Altix serial card
2768                 82 = /dev/ttyVR0               NEC VR4100 series SIU
2769                 83 = /dev/ttyVR1               NEC VR4100 series DSIU
2770                 84 = /dev/ttyIOC84             Altix ioc4 serial card
2771                    ...
2772                 115 = /dev/ttyIOC115           Altix ioc4 serial card
2773                 116 = /dev/ttySIOC0            Altix ioc3 serial card
2774                    ...
2775                 147 = /dev/ttySIOC31           Altix ioc3 serial card
2776                 148 = /dev/ttyPSC0             PPC PSC - port 0
2777                    ...
2778                 153 = /dev/ttyPSC5             PPC PSC - port 5
2779                 154 = /dev/ttyAT0              ATMEL serial port 0
2780                    ...
2781                 169 = /dev/ttyAT15             ATMEL serial port 15
2782                 170 = /dev/ttyNX0              Hilscher netX serial port 0
2783                    ...
2784                 185 = /dev/ttyNX15             Hilscher netX serial port 15
2785                 186 = /dev/ttyJ0               JTAG1 DCC protocol based serial port emulation
2786                 187 = /dev/ttyUL0              Xilinx uartlite - port 0
2787                    ...
2788                 190 = /dev/ttyUL3              Xilinx uartlite - port 3
2789                 191 = /dev/xvc0                Xen virtual console - port 0
2790                 192 = /dev/ttyPZ0              pmac_zilog - port 0
2791                    ...
2792                 195 = /dev/ttyPZ3              pmac_zilog - port 3
2793                 196 = /dev/ttyTX0              TX39/49 serial port 0
2794                    ...
2795                 204 = /dev/ttyTX7              TX39/49 serial port 7
2796                 205 = /dev/ttySC0              SC26xx serial port 0
2797                 206 = /dev/ttySC1              SC26xx serial port 1
2798                 207 = /dev/ttySC2              SC26xx serial port 2
2799                 208 = /dev/ttySC3              SC26xx serial port 3
2800                 209 = /dev/ttyMAX0             MAX3100 serial port 0
2801                 210 = /dev/ttyMAX1             MAX3100 serial port 1
2802                 211 = /dev/ttyMAX2             MAX3100 serial port 2
2803                 212 = /dev/ttyMAX3             MAX3100 serial port 3
2804
2805205 char        Low-density serial ports (alternate device)
2806                  0 = /dev/culu0                Callout device for ttyLU0
2807                  1 = /dev/culu1                Callout device for ttyLU1
2808                  2 = /dev/culu2                Callout device for ttyLU2
2809                  3 = /dev/culu3                Callout device for ttyLU3
2810                  4 = /dev/cufb0                Callout device for ttyFB0
2811                  5 = /dev/cusa0                Callout device for ttySA0
2812                  6 = /dev/cusa1                Callout device for ttySA1
2813                  7 = /dev/cusa2                Callout device for ttySA2
2814                  8 = /dev/cusc0                Callout device for ttySC0
2815                  9 = /dev/cusc1                Callout device for ttySC1
2816                 10 = /dev/cusc2                Callout device for ttySC2
2817                 11 = /dev/cusc3                Callout device for ttySC3
2818                 12 = /dev/cufw0                Callout device for ttyFW0
2819                 13 = /dev/cufw1                Callout device for ttyFW1
2820                 14 = /dev/cufw2                Callout device for ttyFW2
2821                 15 = /dev/cufw3                Callout device for ttyFW3
2822                 16 = /dev/cuam0                Callout device for ttyAM0
2823                    ...
2824                 31 = /dev/cuam15               Callout device for ttyAM15
2825                 32 = /dev/cudb0                Callout device for ttyDB0
2826                    ...
2827                 39 = /dev/cudb7                Callout device for ttyDB7
2828                 40 = /dev/cusg0                Callout device for ttySG0
2829                 41 = /dev/ttycusmx0            Callout device for ttySMX0
2830                 42 = /dev/ttycusmx1            Callout device for ttySMX1
2831                 43 = /dev/ttycusmx2            Callout device for ttySMX2
2832                 46 = /dev/cucpm0               Callout device for ttyCPM0
2833                    ...
2834                 49 = /dev/cucpm5               Callout device for ttyCPM5
2835                 50 = /dev/cuioc40              Callout device for ttyIOC40
2836                    ...
2837                 81 = /dev/cuioc431             Callout device for ttyIOC431
2838                 82 = /dev/cuvr0                Callout device for ttyVR0
2839                 83 = /dev/cuvr1                Callout device for ttyVR1
2840
2841206 char        OnStream SC-x0 tape devices
2842                  0 = /dev/osst0                First OnStream SCSI tape, mode 0
2843                  1 = /dev/osst1                Second OnStream SCSI tape, mode 0
2844                    ...
2845                 32 = /dev/osst0l               First OnStream SCSI tape, mode 1
2846                 33 = /dev/osst1l               Second OnStream SCSI tape, mode 1
2847                    ...
2848                 64 = /dev/osst0m               First OnStream SCSI tape, mode 2
2849                 65 = /dev/osst1m               Second OnStream SCSI tape, mode 2
2850                    ...
2851                 96 = /dev/osst0a               First OnStream SCSI tape, mode 3
2852                 97 = /dev/osst1a               Second OnStream SCSI tape, mode 3
2853                    ...
2854                128 = /dev/nosst0               No rewind version of /dev/osst0
2855                129 = /dev/nosst1               No rewind version of /dev/osst1
2856                    ...
2857                160 = /dev/nosst0l              No rewind version of /dev/osst0l
2858                161 = /dev/nosst1l              No rewind version of /dev/osst1l
2859                    ...
2860                192 = /dev/nosst0m              No rewind version of /dev/osst0m
2861                193 = /dev/nosst1m              No rewind version of /dev/osst1m
2862                    ...
2863                224 = /dev/nosst0a              No rewind version of /dev/osst0a
2864                225 = /dev/nosst1a              No rewind version of /dev/osst1a
2865                    ...
2866
2867                The OnStream SC-x0 SCSI tapes do not support the
2868                standard SCSI SASD command set and therefore need
2869                their own driver "osst". Note that the IDE, USB (and
2870                maybe ParPort) versions may be driven via ide-scsi or
2871                usb-storage SCSI emulation and this osst device and
2872                driver as well.  The ADR-x0 drives are QIC-157
2873                compliant and don't need osst.
2874
2875207 char        Compaq ProLiant health feature indicate
2876                  0 = /dev/cpqhealth/cpqw       Redirector interface
2877                  1 = /dev/cpqhealth/crom       EISA CROM
2878                  2 = /dev/cpqhealth/cdt        Data Table
2879                  3 = /dev/cpqhealth/cevt       Event Log
2880                  4 = /dev/cpqhealth/casr       Automatic Server Recovery
2881                  5 = /dev/cpqhealth/cecc       ECC Memory
2882                  6 = /dev/cpqhealth/cmca       Machine Check Architecture
2883                  7 = /dev/cpqhealth/ccsm       Deprecated CDT
2884                  8 = /dev/cpqhealth/cnmi       NMI Handling
2885                  9 = /dev/cpqhealth/css        Sideshow Management
2886                 10 = /dev/cpqhealth/cram       CMOS interface
2887                 11 = /dev/cpqhealth/cpci       PCI IRQ interface
2888
2889208 char        User space serial ports
2890                  0 = /dev/ttyU0                First user space serial port
2891                  1 = /dev/ttyU1                Second user space serial port
2892                    ...
2893
2894209 char        User space serial ports (alternate devices)
2895                  0 = /dev/cuu0                 Callout device for ttyU0
2896                  1 = /dev/cuu1                 Callout device for ttyU1
2897                    ...
2898
2899210 char        SBE, Inc. sync/async serial card
2900                  0 = /dev/sbei/wxcfg0          Configuration device for board 0
2901                  1 = /dev/sbei/dld0            Download device for board 0
2902                  2 = /dev/sbei/wan00           WAN device, port 0, board 0
2903                  3 = /dev/sbei/wan01           WAN device, port 1, board 0
2904                  4 = /dev/sbei/wan02           WAN device, port 2, board 0
2905                  5 = /dev/sbei/wan03           WAN device, port 3, board 0
2906                  6 = /dev/sbei/wanc00          WAN clone device, port 0, board 0
2907                  7 = /dev/sbei/wanc01          WAN clone device, port 1, board 0
2908                  8 = /dev/sbei/wanc02          WAN clone device, port 2, board 0
2909                  9 = /dev/sbei/wanc03          WAN clone device, port 3, board 0
2910                 10 = /dev/sbei/wxcfg1          Configuration device for board 1
2911                 11 = /dev/sbei/dld1            Download device for board 1
2912                 12 = /dev/sbei/wan10           WAN device, port 0, board 1
2913                 13 = /dev/sbei/wan11           WAN device, port 1, board 1
2914                 14 = /dev/sbei/wan12           WAN device, port 2, board 1
2915                 15 = /dev/sbei/wan13           WAN device, port 3, board 1
2916                 16 = /dev/sbei/wanc10          WAN clone device, port 0, board 1
2917                 17 = /dev/sbei/wanc11          WAN clone device, port 1, board 1
2918                 18 = /dev/sbei/wanc12          WAN clone device, port 2, board 1
2919                 19 = /dev/sbei/wanc13          WAN clone device, port 3, board 1
2920                    ...
2921
2922                Yes, each board is really spaced 10 (decimal) apart.
2923
2924211 char        Addinum CPCI1500 digital I/O card
2925                  0 = /dev/addinum/cpci1500/0   First CPCI1500 card
2926                  1 = /dev/addinum/cpci1500/1   Second CPCI1500 card
2927                    ...
2928
2929212 char        LinuxTV.org DVB driver subsystem
2930                  0 = /dev/dvb/adapter0/video0    first video decoder of first card
2931                  1 = /dev/dvb/adapter0/audio0    first audio decoder of first card
2932                  2 = /dev/dvb/adapter0/sec0      (obsolete/unused)
2933                  3 = /dev/dvb/adapter0/frontend0 first frontend device of first card
2934                  4 = /dev/dvb/adapter0/demux0    first demux device of first card
2935                  5 = /dev/dvb/adapter0/dvr0      first digital video recoder device of first card
2936                  6 = /dev/dvb/adapter0/ca0       first common access port of first card
2937                  7 = /dev/dvb/adapter0/net0      first network device of first card
2938                  8 = /dev/dvb/adapter0/osd0      first on-screen-display device of first card
2939                  9 = /dev/dvb/adapter0/video1    second video decoder of first card
2940                    ...
2941                 64 = /dev/dvb/adapter1/video0    first video decoder of second card
2942                    ...
2943                128 = /dev/dvb/adapter2/video0    first video decoder of third card
2944                    ...
2945                196 = /dev/dvb/adapter3/video0    first video decoder of fourth card
2946
2947216 char        Bluetooth RFCOMM TTY devices
2948                  0 = /dev/rfcomm0              First Bluetooth RFCOMM TTY device
2949                  1 = /dev/rfcomm1              Second Bluetooth RFCOMM TTY device
2950                    ...
2951
2952217 char        Bluetooth RFCOMM TTY devices (alternate devices)
2953                  0 = /dev/curf0                Callout device for rfcomm0
2954                  1 = /dev/curf1                Callout device for rfcomm1
2955                    ...
2956
2957218 char        The Logical Company bus Unibus/Qbus adapters
2958                  0 = /dev/logicalco/bci/0      First bus adapter
2959                  1 = /dev/logicalco/bci/1      First bus adapter
2960                    ...
2961
2962219 char        The Logical Company DCI-1300 digital I/O card
2963                  0 = /dev/logicalco/dci1300/0  First DCI-1300 card
2964                  1 = /dev/logicalco/dci1300/1  Second DCI-1300 card
2965                    ...
2966
2967220 char        Myricom Myrinet "GM" board
2968                  0 = /dev/myricom/gm0          First Myrinet GM board
2969                  1 = /dev/myricom/gmp0         First board "root access"
2970                  2 = /dev/myricom/gm1          Second Myrinet GM board
2971                  3 = /dev/myricom/gmp1         Second board "root access"
2972                    ...
2973
2974221 char        VME bus
2975                  0 = /dev/bus/vme/m0           First master image
2976                  1 = /dev/bus/vme/m1           Second master image
2977                  2 = /dev/bus/vme/m2           Third master image
2978                  3 = /dev/bus/vme/m3           Fourth master image
2979                  4 = /dev/bus/vme/s0           First slave image
2980                  5 = /dev/bus/vme/s1           Second slave image
2981                  6 = /dev/bus/vme/s2           Third slave image
2982                  7 = /dev/bus/vme/s3           Fourth slave image
2983                  8 = /dev/bus/vme/ctl          Control
2984
2985                It is expected that all VME bus drivers will use the
2986                same interface.  For interface documentation see
2987                http://www.vmelinux.org/.
2988
2989224 char        A2232 serial card
2990                  0 = /dev/ttyY0                First A2232 port
2991                  1 = /dev/ttyY1                Second A2232 port
2992                    ...
2993
2994225 char        A2232 serial card (alternate devices)
2995                  0 = /dev/cuy0                 Callout device for ttyY0
2996                  1 = /dev/cuy1                 Callout device for ttyY1
2997                    ...
2998
2999226 char        Direct Rendering Infrastructure (DRI)
3000                  0 = /dev/dri/card0            First graphics card
3001                  1 = /dev/dri/card1            Second graphics card
3002                    ...
3003
3004227 char        IBM 3270 terminal Unix tty access
3005                  1 = /dev/3270/tty1            First 3270 terminal
3006                  2 = /dev/3270/tty2            Seconds 3270 terminal
3007                    ...
3008
3009228 char        IBM 3270 terminal block-mode access
3010                  0 = /dev/3270/tub             Controlling interface
3011                  1 = /dev/3270/tub1            First 3270 terminal
3012                  2 = /dev/3270/tub2            Second 3270 terminal
3013                    ...
3014
3015229 char        IBM iSeries/pSeries virtual console
3016                  0 = /dev/hvc0                 First console port
3017                  1 = /dev/hvc1                 Second console port
3018                    ...
3019
3020230 char        IBM iSeries virtual tape
3021                  0 = /dev/iseries/vt0          First virtual tape, mode 0
3022                  1 = /dev/iseries/vt1          Second virtual tape, mode 0
3023                    ...
3024                 32 = /dev/iseries/vt0l         First virtual tape, mode 1
3025                 33 = /dev/iseries/vt1l         Second virtual tape, mode 1
3026                    ...
3027                 64 = /dev/iseries/vt0m         First virtual tape, mode 2
3028                 65 = /dev/iseries/vt1m         Second virtual tape, mode 2
3029                    ...
3030                 96 = /dev/iseries/vt0a         First virtual tape, mode 3
3031                 97 = /dev/iseries/vt1a         Second virtual tape, mode 3
3032                      ...
3033                128 = /dev/iseries/nvt0         First virtual tape, mode 0, no rewind
3034                129 = /dev/iseries/nvt1         Second virtual tape, mode 0, no rewind
3035                    ...
3036                160 = /dev/iseries/nvt0l        First virtual tape, mode 1, no rewind
3037                161 = /dev/iseries/nvt1l        Second virtual tape, mode 1, no rewind
3038                    ...
3039                192 = /dev/iseries/nvt0m        First virtual tape, mode 2, no rewind
3040                193 = /dev/iseries/nvt1m        Second virtual tape, mode 2, no rewind
3041                    ...
3042                224 = /dev/iseries/nvt0a        First virtual tape, mode 3, no rewind
3043                225 = /dev/iseries/nvt1a        Second virtual tape, mode 3, no rewind
3044                    ...
3045
3046                "No rewind" refers to the omission of the default
3047                automatic rewind on device close.  The MTREW or MTOFFL
3048                ioctl()'s can be used to rewind the tape regardless of
3049                the device used to access it.
3050
3051231 char        InfiniBand
3052                0 = /dev/infiniband/umad0
3053                1 = /dev/infiniband/umad1
3054                  ...
3055                63 = /dev/infiniband/umad63    63rd InfiniBandMad device
3056                64 = /dev/infiniband/issm0     First InfiniBand IsSM device
3057                65 = /dev/infiniband/issm1     Second InfiniBand IsSM device
3058                  ...
3059                127 = /dev/infiniband/issm63    63rd InfiniBand IsSM device
3060                128 = /dev/infiniband/uverbs0   First InfiniBand verbs device
3061                129 = /dev/infiniband/uverbs1   Second InfiniBand verbs device
3062                  ...
3063                159 = /dev/infiniband/uverbs31  31st InfiniBand verbs device
3064
3065232 char        Biometric Devices
3066                0 = /dev/biometric/sensor0/fingerprint  first fingerprint sensor on first device
3067                1 = /dev/biometric/sensor0/iris         first iris sensor on first device
3068                2 = /dev/biometric/sensor0/retina       first retina sensor on first device
3069                3 = /dev/biometric/sensor0/voiceprint   first voiceprint sensor on first device
3070                4 = /dev/biometric/sensor0/facial       first facial sensor on first device
3071                5 = /dev/biometric/sensor0/hand         first hand sensor on first device
3072                  ...
3073                10 = /dev/biometric/sensor1/fingerprint first fingerprint sensor on second device
3074                  ...
3075                20 = /dev/biometric/sensor2/fingerprint first fingerprint sensor on third device
3076                  ...
3077
3078233 char        PathScale InfiniPath interconnect
3079                0 = /dev/ipath        Primary device for programs (any unit)
3080                1 = /dev/ipath0       Access specifically to unit 0
3081                2 = /dev/ipath1       Access specifically to unit 1
3082                  ...
3083                4 = /dev/ipath3       Access specifically to unit 3
3084                129 = /dev/ipath_sma    Device used by Subnet Management Agent
3085                130 = /dev/ipath_diag   Device used by diagnostics programs
3086
3087234-239         UNASSIGNED
3088
3089240-254 char    LOCAL/EXPERIMENTAL USE
3090
3091240-254 block   LOCAL/EXPERIMENTAL USE
3092                Allocated for local/experimental use.  For devices not
3093                assigned official numbers, these ranges should be
3094                used in order to avoid conflicting with future assignments.
3095
3096255 char        RESERVED
3097
3098255 block       RESERVED
3099
3100                This major is reserved to assist the expansion to a
3101                larger number space.  No device nodes with this major
3102                should ever be created on the filesystem.
3103                (This is probably not true anymore, but I'll leave it
3104                for now /Torben)
3105
3106---LARGE MAJORS!!!!!---
3107
3108256 char        Equinox SST multi-port serial boards
3109                   0 = /dev/ttyEQ0      First serial port on first Equinox SST board
3110                 127 = /dev/ttyEQ127    Last serial port on first Equinox SST board
3111                 128 = /dev/ttyEQ128    First serial port on second Equinox SST board
3112                  ...
3113                1027 = /dev/ttyEQ1027   Last serial port on eighth Equinox SST board
3114
3115256 block       Resident Flash Disk Flash Translation Layer
3116                  0 = /dev/rfda         First RFD FTL layer
3117                 16 = /dev/rfdb         Second RFD FTL layer
3118                  ...
3119                240 = /dev/rfdp         16th RFD FTL layer
3120
3121257 char        Phoenix Technologies Cryptographic Services Driver
3122                  0 = /dev/ptlsec       Crypto Services Driver
3123
3124257 block       SSFDC Flash Translation Layer filesystem
3125                  0 = /dev/ssfdca       First SSFDC layer
3126                  8 = /dev/ssfdcb       Second SSFDC layer
3127                 16 = /dev/ssfdcc       Third SSFDC layer
3128                 24 = /dev/ssfdcd       4th SSFDC layer
3129                 32 = /dev/ssfdce       5th SSFDC layer
3130                 40 = /dev/ssfdcf       6th SSFDC layer
3131                 48 = /dev/ssfdcg       7th SSFDC layer
3132                 56 = /dev/ssfdch       8th SSFDC layer
3133
3134258 block       ROM/Flash read-only translation layer
3135                  0 = /dev/blockrom0    First ROM card's translation layer interface
3136                  1 = /dev/blockrom1    Second ROM card's translation layer interface
3137                  ...
3138
3139259 block       Block Extended Major
3140                  Used dynamically to hold additional partition minor
3141                  numbers and allow large numbers of partitions per device
3142
3143259 char        FPGA configuration interfaces
3144                  0 = /dev/icap0        First Xilinx internal configuration
3145                  1 = /dev/icap1        Second Xilinx internal configuration
3146
3147260 char        OSD (Object-based-device) SCSI Device
3148                  0 = /dev/osd0         First OSD Device
3149                  1 = /dev/osd1         Second OSD Device
3150                  ...
3151                  255 = /dev/osd255     256th OSD Device
3152
3153 ****   ADDITIONAL /dev DIRECTORY ENTRIES
3154
3155This section details additional entries that should or may exist in
3156the /dev directory.  It is preferred that symbolic links use the same
3157form (absolute or relative) as is indicated here.  Links are
3158classified as "hard" or "symbolic" depending on the preferred type of
3159link; if possible, the indicated type of link should be used.
3160
3161
3162        Compulsory links
3163
3164These links should exist on all systems:
3165
3166/dev/fd         /proc/self/fd   symbolic        File descriptors
3167/dev/stdin      fd/0            symbolic        stdin file descriptor
3168/dev/stdout     fd/1            symbolic        stdout file descriptor
3169/dev/stderr     fd/2            symbolic        stderr file descriptor
3170/dev/nfsd       socksys         symbolic        Required by iBCS-2
3171/dev/X0R        null            symbolic        Required by iBCS-2
3172
3173Note: /dev/X0R is <letter X>-<digit 0>-<letter R>.
3174
3175        Recommended links
3176
3177It is recommended that these links exist on all systems:
3178
3179/dev/core       /proc/kcore     symbolic        Backward compatibility
3180/dev/ramdisk    ram0            symbolic        Backward compatibility
3181/dev/ftape      qft0            symbolic        Backward compatibility
3182/dev/bttv0      video0          symbolic        Backward compatibility
3183/dev/radio      radio0          symbolic        Backward compatibility
3184/dev/i2o*       /dev/i2o/*      symbolic        Backward compatibility
3185/dev/scd?       sr?             hard            Alternate SCSI CD-ROM name
3186
3187        Locally defined links
3188
3189The following links may be established locally to conform to the
3190configuration of the system.  This is merely a tabulation of existing
3191practice, and does not constitute a recommendation.  However, if they
3192exist, they should have the following uses.
3193
3194/dev/mouse      mouse port      symbolic        Current mouse device
3195/dev/tape       tape device     symbolic        Current tape device
3196/dev/cdrom      CD-ROM device   symbolic        Current CD-ROM device
3197/dev/cdwriter   CD-writer       symbolic        Current CD-writer device
3198/dev/scanner    scanner         symbolic        Current scanner device
3199/dev/modem      modem port      symbolic        Current dialout device
3200/dev/root       root device     symbolic        Current root filesystem
3201/dev/swap       swap device     symbolic        Current swap device
3202
3203/dev/modem should not be used for a modem which supports dialin as
3204well as dialout, as it tends to cause lock file problems.  If it
3205exists, /dev/modem should point to the appropriate primary TTY device
3206(the use of the alternate callout devices is deprecated).
3207
3208For SCSI devices, /dev/tape and /dev/cdrom should point to the
3209``cooked'' devices (/dev/st* and /dev/sr*, respectively), whereas
3210/dev/cdwriter and /dev/scanner should point to the appropriate generic
3211SCSI devices (/dev/sg*).
3212
3213/dev/mouse may point to a primary serial TTY device, a hardware mouse
3214device, or a socket for a mouse driver program (e.g. /dev/gpmdata).
3215
3216        Sockets and pipes
3217
3218Non-transient sockets and named pipes may exist in /dev.  Common entries are:
3219
3220/dev/printer    socket          lpd local socket
3221/dev/log        socket          syslog local socket
3222/dev/gpmdata    socket          gpm mouse multiplexer
3223
3224        Mount points
3225
3226The following names are reserved for mounting special filesystems
3227under /dev.  These special filesystems provide kernel interfaces that
3228cannot be provided with standard device nodes.
3229
3230/dev/pts        devpts          PTY slave filesystem
3231/dev/shm        tmpfs           POSIX shared memory maintenance access
3232
3233 ****   TERMINAL DEVICES
3234
3235Terminal, or TTY devices are a special class of character devices.  A
3236terminal device is any device that could act as a controlling terminal
3237for a session; this includes virtual consoles, serial ports, and
3238pseudoterminals (PTYs).
3239
3240All terminal devices share a common set of capabilities known as line
3241disciplines; these include the common terminal line discipline as well
3242as SLIP and PPP modes.
3243
3244All terminal devices are named similarly; this section explains the
3245naming and use of the various types of TTYs.  Note that the naming
3246conventions include several historical warts; some of these are
3247Linux-specific, some were inherited from other systems, and some
3248reflect Linux outgrowing a borrowed convention.
3249
3250A hash mark (#) in a device name is used here to indicate a decimal
3251number without leading zeroes.
3252
3253        Virtual consoles and the console device
3254
3255Virtual consoles are full-screen terminal displays on the system video
3256monitor.  Virtual consoles are named /dev/tty#, with numbering
3257starting at /dev/tty1; /dev/tty0 is the current virtual console.
3258/dev/tty0 is the device that should be used to access the system video
3259card on those architectures for which the frame buffer devices
3260(/dev/fb*) are not applicable.  Do not use /dev/console
3261for this purpose.
3262
3263The console device, /dev/console, is the device to which system
3264messages should be sent, and on which logins should be permitted in
3265single-user mode.  Starting with Linux 2.1.71, /dev/console is managed
3266by the kernel; for previous versions it should be a symbolic link to
3267either /dev/tty0, a specific virtual console such as /dev/tty1, or to
3268a serial port primary (tty*, not cu*) device, depending on the
3269configuration of the system.
3270
3271        Serial ports
3272
3273Serial ports are RS-232 serial ports and any device which simulates
3274one, either in hardware (such as internal modems) or in software (such
3275as the ISDN driver.)  Under Linux, each serial ports has two device
3276names, the primary or callin device and the alternate or callout one.
3277Each kind of device is indicated by a different letter.  For any
3278letter X, the names of the devices are /dev/ttyX# and /dev/cux#,
3279respectively; for historical reasons, /dev/ttyS# and /dev/ttyC#
3280correspond to /dev/cua# and /dev/cub#.  In the future, it should be
3281expected that multiple letters will be used; all letters will be upper
3282case for the "tty" device (e.g. /dev/ttyDP#) and lower case for the
3283"cu" device (e.g. /dev/cudp#).
3284
3285The names /dev/ttyQ# and /dev/cuq# are reserved for local use.
3286
3287The alternate devices provide for kernel-based exclusion and somewhat
3288different defaults than the primary devices.  Their main purpose is to
3289allow the use of serial ports with programs with no inherent or broken
3290support for serial ports.  Their use is deprecated, and they may be
3291removed from a future version of Linux.
3292
3293Arbitration of serial ports is provided by the use of lock files with
3294the names /var/lock/LCK..ttyX#.  The contents of the lock file should
3295be the PID of the locking process as an ASCII number.
3296
3297It is common practice to install links such as /dev/modem
3298which point to serial ports.  In order to ensure proper locking in the
3299presence of these links, it is recommended that software chase
3300symlinks and lock all possible names; additionally, it is recommended
3301that a lock file be installed with the corresponding alternate
3302device.  In order to avoid deadlocks, it is recommended that the locks
3303are acquired in the following order, and released in the reverse:
3304
3305        1. The symbolic link name, if any (/var/lock/LCK..modem)
3306        2. The "tty" name (/var/lock/LCK..ttyS2)
3307        3. The alternate device name (/var/lock/LCK..cua2)
3308
3309In the case of nested symbolic links, the lock files should be
3310installed in the order the symlinks are resolved.
3311
3312Under no circumstances should an application hold a lock while waiting
3313for another to be released.  In addition, applications which attempt
3314to create lock files for the corresponding alternate device names
3315should take into account the possibility of being used on a non-serial
3316port TTY, for which no alternate device would exist.
3317
3318        Pseudoterminals (PTYs)
3319
3320Pseudoterminals, or PTYs, are used to create login sessions or provide
3321other capabilities requiring a TTY line discipline (including SLIP or
3322PPP capability) to arbitrary data-generation processes.  Each PTY has
3323a master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named
3324/dev/tty[p-za-e][0-9a-f].  The kernel arbitrates the use of PTYs by
3325allowing each master side to be opened only once.
3326
3327Once the master side has been opened, the corresponding slave device
3328can be used in the same manner as any TTY device.  The master and
3329slave devices are connected by the kernel, generating the equivalent
3330of a bidirectional pipe with TTY capabilities.
3331
3332Recent versions of the Linux kernels and GNU libc contain support for
3333the System V/Unix98 naming scheme for PTYs, which assigns a common
3334device, /dev/ptmx, to all the masters (opening it will automatically
3335give you a previously unassigned PTY) and a subdirectory, /dev/pts,
3336for the slaves; the slaves are named with decimal integers (/dev/pts/#
3337in our notation).  This removes the problem of exhausting the
3338namespace and enables the kernel to automatically create the device
3339nodes for the slaves on demand using the "devpts" filesystem.
3340
3341
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