linux/Documentation/devices.txt
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   1
   2                    LINUX ALLOCATED DEVICES (2.6+ version)
   3
   4             Maintained by Torben Mathiasen <device@lanana.org>
   5
   6                      Last revised: 29 November 2006
   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  17The LaTeX version of this document is no longer maintained.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  26The symbol {2.6} means the allocation is obsolete and scheduled for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
  70Finally, sometimes I have to play "namespace police."  Please don't be
  71offended.  I often get submissions for /dev names that would be bound
  72to cause conflicts down the road.  I am trying to avoid getting in a
  73situation where we would have to suffer an incompatible forward
  74change.  Therefore, please consult with me *before* you make your
  75device names and numbers in any way public, at least to the point
  76where it would be at all difficult to get them changed.
  77
  78Your cooperation is appreciated.
  79
  80
  81  0             Unnamed devices (e.g. non-device mounts)
  82                  0 = reserved as null device number
  83                See block major 144, 145, 146 for expansion areas.
  84
  85  1 char        Memory devices
  86                  1 = /dev/mem          Physical memory access
  87                  2 = /dev/kmem         Kernel virtual memory access
  88                  3 = /dev/null         Null device
  89                  4 = /dev/port         I/O port access
  90                  5 = /dev/zero         Null byte source
  91                  6 = /dev/core         OBSOLETE - replaced by /proc/kcore
  92                  7 = /dev/full         Returns ENOSPC on write
  93                  8 = /dev/random       Nondeterministic random number gen.
  94                  9 = /dev/urandom      Faster, less secure random number gen.
  95                 10 = /dev/aio          Asynchronous I/O notification interface
  96                 11 = /dev/kmsg         Writes to this come out as printk's
  97                 12 = /dev/oldmem       Used by crashdump kernels to access
  98                                        the memory of the kernel that crashed.
  99
 100  1 block       RAM disk
 101                  0 = /dev/ram0         First RAM disk
 102                  1 = /dev/ram1         Second RAM disk
 103                    ...
 104                250 = /dev/initrd       Initial RAM disk {2.6}
 105
 106                Older kernels had /dev/ramdisk (1, 1) here.
 107                /dev/initrd refers to a RAM disk which was preloaded
 108                by the boot loader; newer kernels use /dev/ram0 for
 109                the initrd.
 110
 111  2 char        Pseudo-TTY masters
 112                  0 = /dev/ptyp0        First PTY master
 113                  1 = /dev/ptyp1        Second PTY master
 114                    ...
 115                255 = /dev/ptyef        256th PTY master
 116
 117                Pseudo-tty's are named as follows:
 118                * Masters are "pty", slaves are "tty";
 119                * the fourth letter is one of pqrstuvwxyzabcde indicating
 120                  the 1st through 16th series of 16 pseudo-ttys each, and
 121                * the fifth letter is one of 0123456789abcdef indicating
 122                  the position within the series.
 123
 124                These are the old-style (BSD) PTY devices; Unix98
 125                devices are on major 128 and above and use the PTY
 126                master multiplex (/dev/ptmx) to acquire a PTY on
 127                demand.
 128
 129  2 block       Floppy disks
 130                  0 = /dev/fd0          Controller 0, drive 0, autodetect
 131                  1 = /dev/fd1          Controller 0, drive 1, autodetect
 132                  2 = /dev/fd2          Controller 0, drive 2, autodetect
 133                  3 = /dev/fd3          Controller 0, drive 3, autodetect
 134                128 = /dev/fd4          Controller 1, drive 0, autodetect
 135                129 = /dev/fd5          Controller 1, drive 1, autodetect
 136                130 = /dev/fd6          Controller 1, drive 2, autodetect
 137                131 = /dev/fd7          Controller 1, drive 3, autodetect
 138
 139                To specify format, add to the autodetect device number:
 140                  0 = /dev/fd?          Autodetect format
 141                  4 = /dev/fd?d360      5.25"  360K in a 360K  drive(1)
 142                 20 = /dev/fd?h360      5.25"  360K in a 1200K drive(1)
 143                 48 = /dev/fd?h410      5.25"  410K in a 1200K drive
 144                 64 = /dev/fd?h420      5.25"  420K in a 1200K drive
 145                 24 = /dev/fd?h720      5.25"  720K in a 1200K drive
 146                 80 = /dev/fd?h880      5.25"  880K in a 1200K drive(1)
 147                  8 = /dev/fd?h1200     5.25" 1200K in a 1200K drive(1)
 148                 40 = /dev/fd?h1440     5.25" 1440K in a 1200K drive(1)
 149                 56 = /dev/fd?h1476     5.25" 1476K in a 1200K drive
 150                 72 = /dev/fd?h1494     5.25" 1494K in a 1200K drive
 151                 92 = /dev/fd?h1600     5.25" 1600K in a 1200K drive(1)
 152
 153                 12 = /dev/fd?u360      3.5"   360K Double Density(2)
 154                 16 = /dev/fd?u720      3.5"   720K Double Density(1)
 155                120 = /dev/fd?u800      3.5"   800K Double Density(2)
 156                 52 = /dev/fd?u820      3.5"   820K Double Density
 157                 68 = /dev/fd?u830      3.5"   830K Double Density
 158                 84 = /dev/fd?u1040     3.5"  1040K Double Density(1)
 159                 88 = /dev/fd?u1120     3.5"  1120K Double Density(1)
 160                 28 = /dev/fd?u1440     3.5"  1440K High Density(1)
 161                124 = /dev/fd?u1600     3.5"  1600K High Density(1)
 162                 44 = /dev/fd?u1680     3.5"  1680K High Density(3)
 163                 60 = /dev/fd?u1722     3.5"  1722K High Density
 164                 76 = /dev/fd?u1743     3.5"  1743K High Density
 165                 96 = /dev/fd?u1760     3.5"  1760K High Density
 166                116 = /dev/fd?u1840     3.5"  1840K High Density(3)
 167                100 = /dev/fd?u1920     3.5"  1920K High Density(1)
 168                 32 = /dev/fd?u2880     3.5"  2880K Extra Density(1)
 169                104 = /dev/fd?u3200     3.5"  3200K Extra Density
 170                108 = /dev/fd?u3520     3.5"  3520K Extra Density
 171                112 = /dev/fd?u3840     3.5"  3840K Extra Density(1)
 172
 173                 36 = /dev/fd?CompaQ    Compaq 2880K drive; obsolete?
 174
 175                (1) Autodetectable format
 176                (2) Autodetectable format in a Double Density (720K) drive only
 177                (3) Autodetectable format in a High Density (1440K) drive only
 178
 179                NOTE: The letter in the device name (d, q, h or u)
 180                signifies the type of drive: 5.25" Double Density (d),
 181                5.25" Quad Density (q), 5.25" High Density (h) or 3.5"
 182                (any model, u).  The use of the capital letters D, H
 183                and E for the 3.5" models have been deprecated, since
 184                the drive type is insignificant for these devices.
 185
 186  3 char        Pseudo-TTY slaves
 187                  0 = /dev/ttyp0        First PTY slave
 188                  1 = /dev/ttyp1        Second PTY slave
 189                    ...
 190                255 = /dev/ttyef        256th PTY slave
 191
 192                These are the old-style (BSD) PTY devices; Unix98
 193                devices are on major 136 and above.
 194
 195  3 block       First MFM, RLL and IDE hard disk/CD-ROM interface
 196                  0 = /dev/hda          Master: whole disk (or CD-ROM)
 197                 64 = /dev/hdb          Slave: whole disk (or CD-ROM)
 198
 199                For partitions, add to the whole disk device number:
 200                  0 = /dev/hd?          Whole disk
 201                  1 = /dev/hd?1         First partition
 202                  2 = /dev/hd?2         Second partition
 203                    ...
 204                 63 = /dev/hd?63        63rd partition
 205
 206                For Linux/i386, partitions 1-4 are the primary
 207                partitions, and 5 and above are logical partitions.
 208                Other versions of Linux use partitioning schemes
 209                appropriate to their respective architectures.
 210
 211  4 char        TTY devices
 212                  0 = /dev/tty0         Current virtual console
 213
 214                  1 = /dev/tty1         First virtual console
 215                    ...
 216                 63 = /dev/tty63        63rd virtual console
 217                 64 = /dev/ttyS0        First UART serial port
 218                    ...
 219                255 = /dev/ttyS191      192nd UART serial port
 220
 221                UART serial ports refer to 8250/16450/16550 series devices.
 222
 223                Older versions of the Linux kernel used this major
 224                number for BSD PTY devices.  As of Linux 2.1.115, this
 225                is no longer supported.  Use major numbers 2 and 3.
 226
 227  4 block       Aliases for dynamically allocated major devices to be used
 228                when its not possible to create the real device nodes
 229                because the root filesystem is mounted read-only.
 230
 231                  0 = /dev/root
 232
 233  5 char        Alternate TTY devices
 234                  0 = /dev/tty          Current TTY device
 235                  1 = /dev/console      System console
 236                  2 = /dev/ptmx         PTY master multiplex
 237                 64 = /dev/cua0         Callout device for ttyS0
 238                    ...
 239                255 = /dev/cua191       Callout device for ttyS191
 240
 241                (5,1) is /dev/console starting with Linux 2.1.71.  See
 242                the section on terminal devices for more information
 243                on /dev/console.
 244
 245  6 char        Parallel printer devices
 246                  0 = /dev/lp0          Parallel printer on parport0
 247                  1 = /dev/lp1          Parallel printer on parport1
 248                    ...
 249
 250                Current Linux kernels no longer have a fixed mapping
 251                between parallel ports and I/O addresses.  Instead,
 252                they are redirected through the parport multiplex layer.
 253
 254  7 char        Virtual console capture devices
 255                  0 = /dev/vcs          Current vc text contents
 256                  1 = /dev/vcs1         tty1 text contents
 257                    ...
 258                 63 = /dev/vcs63        tty63 text contents
 259                128 = /dev/vcsa         Current vc text/attribute contents
 260                129 = /dev/vcsa1        tty1 text/attribute contents
 261                    ...
 262                191 = /dev/vcsa63       tty63 text/attribute contents
 263
 264                NOTE: These devices permit both read and write access.
 265
 266  7 block       Loopback devices
 267                  0 = /dev/loop0        First loop device
 268                  1 = /dev/loop1        Second loop device
 269                    ...
 270
 271                The loop devices are used to mount filesystems not
 272                associated with block devices.  The binding to the
 273                loop devices is handled by mount(8) or losetup(8).
 274
 275  8 block       SCSI disk devices (0-15)
 276                  0 = /dev/sda          First SCSI disk whole disk
 277                 16 = /dev/sdb          Second SCSI disk whole disk
 278                 32 = /dev/sdc          Third SCSI disk whole disk
 279                    ...
 280                240 = /dev/sdp          Sixteenth SCSI disk whole disk
 281
 282                Partitions are handled in the same way as for IDE
 283                disks (see major number 3) except that the limit on
 284                partitions is 15.
 285
 286  9 char        SCSI tape devices
 287                  0 = /dev/st0          First SCSI tape, mode 0
 288                  1 = /dev/st1          Second SCSI tape, mode 0
 289                    ...
 290                 32 = /dev/st0l         First SCSI tape, mode 1
 291                 33 = /dev/st1l         Second SCSI tape, mode 1
 292                    ...
 293                 64 = /dev/st0m         First SCSI tape, mode 2
 294                 65 = /dev/st1m         Second SCSI tape, mode 2
 295                    ...
 296                 96 = /dev/st0a         First SCSI tape, mode 3
 297                 97 = /dev/st1a         Second SCSI tape, mode 3
 298                      ...
 299                128 = /dev/nst0         First SCSI tape, mode 0, no rewind
 300                129 = /dev/nst1         Second SCSI tape, mode 0, no rewind
 301                    ...
 302                160 = /dev/nst0l        First SCSI tape, mode 1, no rewind
 303                161 = /dev/nst1l        Second SCSI tape, mode 1, no rewind
 304                    ...
 305                192 = /dev/nst0m        First SCSI tape, mode 2, no rewind
 306                193 = /dev/nst1m        Second SCSI tape, mode 2, no rewind
 307                    ...
 308                224 = /dev/nst0a        First SCSI tape, mode 3, no rewind
 309                225 = /dev/nst1a        Second SCSI tape, mode 3, no rewind
 310                    ...
 311
 312                "No rewind" refers to the omission of the default
 313                automatic rewind on device close.  The MTREW or MTOFFL
 314                ioctl()'s can be used to rewind the tape regardless of
 315                the device used to access it.
 316
 317  9 block       Metadisk (RAID) devices
 318                  0 = /dev/md0          First metadisk group
 319                  1 = /dev/md1          Second metadisk group
 320                    ...
 321
 322                The metadisk driver is used to span a
 323                filesystem across multiple physical disks.
 324
 325 10 char        Non-serial mice, misc features
 326                  0 = /dev/logibm       Logitech bus mouse
 327                  1 = /dev/psaux        PS/2-style mouse port
 328                  2 = /dev/inportbm     Microsoft Inport bus mouse
 329                  3 = /dev/atibm        ATI XL bus mouse
 330                  4 = /dev/jbm          J-mouse
 331                  4 = /dev/amigamouse   Amiga mouse (68k/Amiga)
 332                  5 = /dev/atarimouse   Atari mouse
 333                  6 = /dev/sunmouse     Sun mouse
 334                  7 = /dev/amigamouse1  Second Amiga mouse
 335                  8 = /dev/smouse       Simple serial mouse driver
 336                  9 = /dev/pc110pad     IBM PC-110 digitizer pad
 337                 10 = /dev/adbmouse     Apple Desktop Bus mouse
 338                 11 = /dev/vrtpanel     Vr41xx embedded touch panel
 339                 13 = /dev/vpcmouse     Connectix Virtual PC Mouse
 340                 14 = /dev/touchscreen/ucb1x00  UCB 1x00 touchscreen
 341                 15 = /dev/touchscreen/mk712    MK712 touchscreen
 342                128 = /dev/beep         Fancy beep device
 343                129 = /dev/modreq       Kernel module load request {2.6}
 344                130 = /dev/watchdog     Watchdog timer port
 345                131 = /dev/temperature  Machine internal temperature
 346                132 = /dev/hwtrap       Hardware fault trap
 347                133 = /dev/exttrp       External device trap
 348                134 = /dev/apm_bios     Advanced Power Management BIOS
 349                135 = /dev/rtc          Real Time Clock
 350                139 = /dev/openprom     SPARC OpenBoot PROM
 351                140 = /dev/relay8       Berkshire Products Octal relay card
 352                141 = /dev/relay16      Berkshire Products ISO-16 relay card
 353                142 = /dev/msr          x86 model-specific registers {2.6}
 354                143 = /dev/pciconf      PCI configuration space
 355                144 = /dev/nvram        Non-volatile configuration RAM
 356                145 = /dev/hfmodem      Soundcard shortwave modem control {2.6}
 357                146 = /dev/graphics     Linux/SGI graphics device
 358                147 = /dev/opengl       Linux/SGI OpenGL pipe
 359                148 = /dev/gfx          Linux/SGI graphics effects device
 360                149 = /dev/input/mouse  Linux/SGI Irix emulation mouse
 361                150 = /dev/input/keyboard Linux/SGI Irix emulation keyboard
 362                151 = /dev/led          Front panel LEDs
 363                152 = /dev/kpoll        Kernel Poll Driver
 364                153 = /dev/mergemem     Memory merge device
 365                154 = /dev/pmu          Macintosh PowerBook power manager
 366                155 = /dev/isictl       MultiTech ISICom serial control
 367                156 = /dev/lcd          Front panel LCD display
 368                157 = /dev/ac           Applicom Intl Profibus card
 369                158 = /dev/nwbutton     Netwinder external button
 370                159 = /dev/nwdebug      Netwinder debug interface
 371                160 = /dev/nwflash      Netwinder flash memory
 372                161 = /dev/userdma      User-space DMA access
 373                162 = /dev/smbus        System Management Bus
 374                163 = /dev/lik          Logitech Internet Keyboard
 375                164 = /dev/ipmo         Intel Intelligent Platform Management
 376                165 = /dev/vmmon        VMWare virtual machine monitor
 377                166 = /dev/i2o/ctl      I2O configuration manager
 378                167 = /dev/specialix_sxctl Specialix serial control
 379                168 = /dev/tcldrv       Technology Concepts serial control
 380                169 = /dev/specialix_rioctl Specialix RIO serial control
 381                170 = /dev/thinkpad/thinkpad    IBM Thinkpad devices
 382                171 = /dev/srripc       QNX4 API IPC manager
 383                172 = /dev/usemaclone   Semaphore clone device
 384                173 = /dev/ipmikcs      Intelligent Platform Management
 385                174 = /dev/uctrl        SPARCbook 3 microcontroller
 386                175 = /dev/agpgart      AGP Graphics Address Remapping Table
 387                176 = /dev/gtrsc        Gorgy Timing radio clock
 388                177 = /dev/cbm          Serial CBM bus
 389                178 = /dev/jsflash      JavaStation OS flash SIMM
 390                179 = /dev/xsvc         High-speed shared-mem/semaphore service
 391                180 = /dev/vrbuttons    Vr41xx button input device
 392                181 = /dev/toshiba      Toshiba laptop SMM support
 393                182 = /dev/perfctr      Performance-monitoring counters
 394                183 = /dev/hwrng        Generic random number generator
 395                184 = /dev/cpu/microcode CPU microcode update interface
 396                186 = /dev/atomicps     Atomic shapshot of process state data
 397                187 = /dev/irnet        IrNET device
 398                188 = /dev/smbusbios    SMBus BIOS
 399                189 = /dev/ussp_ctl     User space serial port control
 400                190 = /dev/crash        Mission Critical Linux crash dump facility
 401                191 = /dev/pcl181       <information missing>
 402                192 = /dev/nas_xbus     NAS xbus LCD/buttons access
 403                193 = /dev/d7s          SPARC 7-segment display
 404                194 = /dev/zkshim       Zero-Knowledge network shim control
 405                195 = /dev/elographics/e2201    Elographics touchscreen E271-2201
 406                198 = /dev/sexec        Signed executable interface
 407                199 = /dev/scanners/cuecat :CueCat barcode scanner
 408                200 = /dev/net/tun      TAP/TUN network device
 409                201 = /dev/button/gulpb Transmeta GULP-B buttons
 410                202 = /dev/emd/ctl      Enhanced Metadisk RAID (EMD) control
 411                204 = /dev/video/em8300         EM8300 DVD decoder control
 412                205 = /dev/video/em8300_mv      EM8300 DVD decoder video
 413                206 = /dev/video/em8300_ma      EM8300 DVD decoder audio
 414                207 = /dev/video/em8300_sp      EM8300 DVD decoder subpicture
 415                208 = /dev/compaq/cpqphpc       Compaq PCI Hot Plug Controller
 416                209 = /dev/compaq/cpqrid        Compaq Remote Insight Driver
 417                210 = /dev/impi/bt      IMPI coprocessor block transfer
 418                211 = /dev/impi/smic    IMPI coprocessor stream interface
 419                212 = /dev/watchdogs/0  First watchdog device
 420                213 = /dev/watchdogs/1  Second watchdog device
 421                214 = /dev/watchdogs/2  Third watchdog device
 422                215 = /dev/watchdogs/3  Fourth watchdog device
 423                216 = /dev/fujitsu/apanel       Fujitsu/Siemens application panel
 424                217 = /dev/ni/natmotn           National Instruments Motion
 425                218 = /dev/kchuid       Inter-process chuid control
 426                219 = /dev/modems/mwave MWave modem firmware upload
 427                220 = /dev/mptctl       Message passing technology (MPT) control
 428                221 = /dev/mvista/hssdsi        Montavista PICMG hot swap system driver
 429                222 = /dev/mvista/hasi          Montavista PICMG high availability
 430                223 = /dev/input/uinput         User level driver support for input
 431                224 = /dev/tpm          TCPA TPM driver
 432                225 = /dev/pps          Pulse Per Second driver
 433                226 = /dev/systrace     Systrace device
 434                227 = /dev/mcelog       X86_64 Machine Check Exception driver
 435                228 = /dev/hpet         HPET driver
 436                229 = /dev/fuse         Fuse (virtual filesystem in user-space)
 437                230 = /dev/midishare    MidiShare driver
 438                240-254                 Reserved for local use
 439                255                     Reserved for MISC_DYNAMIC_MINOR
 440
 441 11 char        Raw keyboard device     (Linux/SPARC only)
 442                  0 = /dev/kbd          Raw keyboard device
 443
 444 11 char        Serial Mux device       (Linux/PA-RISC only)
 445                  0 = /dev/ttyB0        First mux port
 446                  1 = /dev/ttyB1        Second mux port
 447                    ...
 448
 449 11 block       SCSI CD-ROM devices
 450                  0 = /dev/scd0         First SCSI CD-ROM
 451                  1 = /dev/scd1         Second SCSI CD-ROM
 452                    ...
 453
 454                The prefix /dev/sr (instead of /dev/scd) has been deprecated.
 455
 456 12 char        QIC-02 tape
 457                  2 = /dev/ntpqic11     QIC-11, no rewind-on-close
 458                  3 = /dev/tpqic11      QIC-11, rewind-on-close
 459                  4 = /dev/ntpqic24     QIC-24, no rewind-on-close
 460                  5 = /dev/tpqic24      QIC-24, rewind-on-close
 461                  6 = /dev/ntpqic120    QIC-120, no rewind-on-close
 462                  7 = /dev/tpqic120     QIC-120, rewind-on-close
 463                  8 = /dev/ntpqic150    QIC-150, no rewind-on-close
 464                  9 = /dev/tpqic150     QIC-150, rewind-on-close
 465
 466                The device names specified are proposed -- if there
 467                are "standard" names for these devices, please let me know.
 468
 469 12 block       MSCDEX CD-ROM callback support {2.6}
 470                  0 = /dev/dos_cd0      First MSCDEX CD-ROM
 471                  1 = /dev/dos_cd1      Second MSCDEX CD-ROM
 472                    ...
 473
 474 13 char        Input core
 475                  0 = /dev/input/js0    First joystick
 476                  1 = /dev/input/js1    Second joystick
 477                    ...
 478                 32 = /dev/input/mouse0 First mouse
 479                 33 = /dev/input/mouse1 Second mouse
 480                    ...
 481                 63 = /dev/input/mice   Unified mouse
 482                 64 = /dev/input/event0 First event queue
 483                 65 = /dev/input/event1 Second event queue
 484                    ...
 485
 486                Each device type has 5 bits (32 minors).
 487
 488 13 block       8-bit MFM/RLL/IDE controller
 489                  0 = /dev/xda          First XT disk whole disk
 490                 64 = /dev/xdb          Second XT disk whole disk
 491
 492                Partitions are handled in the same way as IDE disks
 493                (see major number 3).
 494
 495 14 char        Open Sound System (OSS)
 496                  0 = /dev/mixer        Mixer control
 497                  1 = /dev/sequencer    Audio sequencer
 498                  2 = /dev/midi00       First MIDI port
 499                  3 = /dev/dsp          Digital audio
 500                  4 = /dev/audio        Sun-compatible digital audio
 501                  6 = /dev/sndstat      Sound card status information {2.6}
 502                  7 = /dev/audioctl     SPARC audio control device
 503                  8 = /dev/sequencer2   Sequencer -- alternate device
 504                 16 = /dev/mixer1       Second soundcard mixer control
 505                 17 = /dev/patmgr0      Sequencer patch manager
 506                 18 = /dev/midi01       Second MIDI port
 507                 19 = /dev/dsp1         Second soundcard digital audio
 508                 20 = /dev/audio1       Second soundcard Sun digital audio
 509                 33 = /dev/patmgr1      Sequencer patch manager
 510                 34 = /dev/midi02       Third MIDI port
 511                 50 = /dev/midi03       Fourth MIDI port
 512
 513 14 block       BIOS harddrive callback support {2.6}
 514                  0 = /dev/dos_hda      First BIOS harddrive whole disk
 515                 64 = /dev/dos_hdb      Second BIOS harddrive whole disk
 516                128 = /dev/dos_hdc      Third BIOS harddrive whole disk
 517                192 = /dev/dos_hdd      Fourth BIOS harddrive whole disk
 518
 519                Partitions are handled in the same way as IDE disks
 520                (see major number 3).
 521
 522 15 char        Joystick
 523                  0 = /dev/js0          First analog joystick
 524                  1 = /dev/js1          Second analog joystick
 525                    ...
 526                128 = /dev/djs0         First digital joystick
 527                129 = /dev/djs1         Second digital joystick
 528                    ...
 529 15 block       Sony CDU-31A/CDU-33A CD-ROM
 530                  0 = /dev/sonycd       Sony CDU-31a CD-ROM
 531
 532 16 char        Non-SCSI scanners
 533                  0 = /dev/gs4500       Genius 4500 handheld scanner
 534
 535 16 block       GoldStar CD-ROM
 536                  0 = /dev/gscd         GoldStar CD-ROM
 537
 538 17 char        Chase serial card
 539                  0 = /dev/ttyH0        First Chase port
 540                  1 = /dev/ttyH1        Second Chase port
 541                    ...
 542 17 block       Optics Storage CD-ROM
 543                  0 = /dev/optcd        Optics Storage CD-ROM
 544
 545 18 char        Chase serial card - alternate devices
 546                  0 = /dev/cuh0         Callout device for ttyH0
 547                  1 = /dev/cuh1         Callout device for ttyH1
 548                    ...
 549 18 block       Sanyo CD-ROM
 550                  0 = /dev/sjcd         Sanyo CD-ROM
 551
 552 19 char        Cyclades serial card
 553                  0 = /dev/ttyC0        First Cyclades port
 554                    ...
 555                 31 = /dev/ttyC31       32nd Cyclades port
 556
 557 19 block       "Double" compressed disk
 558                  0 = /dev/double0      First compressed disk
 559                    ...
 560                  7 = /dev/double7      Eighth compressed disk
 561                128 = /dev/cdouble0     Mirror of first compressed disk
 562                    ...
 563                135 = /dev/cdouble7     Mirror of eighth compressed disk
 564
 565                See the Double documentation for the meaning of the
 566                mirror devices.
 567
 568 20 char        Cyclades serial card - alternate devices
 569                  0 = /dev/cub0         Callout device for ttyC0
 570                    ...
 571                 31 = /dev/cub31        Callout device for ttyC31
 572
 573 20 block       Hitachi CD-ROM (under development)
 574                  0 = /dev/hitcd        Hitachi CD-ROM
 575
 576 21 char        Generic SCSI access
 577                  0 = /dev/sg0          First generic SCSI device
 578                  1 = /dev/sg1          Second generic SCSI device
 579                    ...
 580
 581                Most distributions name these /dev/sga, /dev/sgb...;
 582                this sets an unnecessary limit of 26 SCSI devices in
 583                the system and is counter to standard Linux
 584                device-naming practice.
 585
 586 21 block       Acorn MFM hard drive interface
 587                  0 = /dev/mfma         First MFM drive whole disk
 588                 64 = /dev/mfmb         Second MFM drive whole disk
 589
 590                This device is used on the ARM-based Acorn RiscPC.
 591                Partitions are handled the same way as for IDE disks
 592                (see major number 3).
 593
 594 22 char        Digiboard serial card
 595                  0 = /dev/ttyD0        First Digiboard port
 596                  1 = /dev/ttyD1        Second Digiboard port
 597                    ...
 598 22 block       Second IDE hard disk/CD-ROM interface
 599                  0 = /dev/hdc          Master: whole disk (or CD-ROM)
 600                 64 = /dev/hdd          Slave: whole disk (or CD-ROM)
 601
 602                Partitions are handled the same way as for the first
 603                interface (see major number 3).
 604
 605 23 char        Digiboard serial card - alternate devices
 606                  0 = /dev/cud0         Callout device for ttyD0
 607                  1 = /dev/cud1         Callout device for ttyD1
 608                      ...
 609 23 block       Mitsumi proprietary CD-ROM
 610                  0 = /dev/mcd          Mitsumi CD-ROM
 611
 612 24 char        Stallion serial card
 613                  0 = /dev/ttyE0        Stallion port 0 card 0
 614                  1 = /dev/ttyE1        Stallion port 1 card 0
 615                    ...
 616                 64 = /dev/ttyE64       Stallion port 0 card 1
 617                 65 = /dev/ttyE65       Stallion port 1 card 1
 618                      ...
 619                128 = /dev/ttyE128      Stallion port 0 card 2
 620                129 = /dev/ttyE129      Stallion port 1 card 2
 621                    ...
 622                192 = /dev/ttyE192      Stallion port 0 card 3
 623                193 = /dev/ttyE193      Stallion port 1 card 3
 624                    ...
 625 24 block       Sony CDU-535 CD-ROM
 626                  0 = /dev/cdu535       Sony CDU-535 CD-ROM
 627
 628 25 char        Stallion serial card - alternate devices
 629                  0 = /dev/cue0         Callout device for ttyE0
 630                  1 = /dev/cue1         Callout device for ttyE1
 631                    ...
 632                 64 = /dev/cue64        Callout device for ttyE64
 633                 65 = /dev/cue65        Callout device for ttyE65
 634                    ...
 635                128 = /dev/cue128       Callout device for ttyE128
 636                129 = /dev/cue129       Callout device for ttyE129
 637                    ...
 638                192 = /dev/cue192       Callout device for ttyE192
 639                193 = /dev/cue193       Callout device for ttyE193
 640                      ...
 641 25 block       First Matsushita (Panasonic/SoundBlaster) CD-ROM
 642                  0 = /dev/sbpcd0       Panasonic CD-ROM controller 0 unit 0
 643                  1 = /dev/sbpcd1       Panasonic CD-ROM controller 0 unit 1
 644                  2 = /dev/sbpcd2       Panasonic CD-ROM controller 0 unit 2
 645                  3 = /dev/sbpcd3       Panasonic CD-ROM controller 0 unit 3
 646
 647 26 char        Quanta WinVision frame grabber {2.6}
 648                  0 = /dev/wvisfgrab    Quanta WinVision frame grabber
 649
 650 26 block       Second Matsushita (Panasonic/SoundBlaster) CD-ROM
 651                  0 = /dev/sbpcd4       Panasonic CD-ROM controller 1 unit 0
 652                  1 = /dev/sbpcd5       Panasonic CD-ROM controller 1 unit 1
 653                  2 = /dev/sbpcd6       Panasonic CD-ROM controller 1 unit 2
 654                  3 = /dev/sbpcd7       Panasonic CD-ROM controller 1 unit 3
 655
 656 27 char        QIC-117 tape
 657                  0 = /dev/qft0         Unit 0, rewind-on-close
 658                  1 = /dev/qft1         Unit 1, rewind-on-close
 659                  2 = /dev/qft2         Unit 2, rewind-on-close
 660                  3 = /dev/qft3         Unit 3, rewind-on-close
 661                  4 = /dev/nqft0        Unit 0, no rewind-on-close
 662                  5 = /dev/nqft1        Unit 1, no rewind-on-close
 663                  6 = /dev/nqft2        Unit 2, no rewind-on-close
 664                  7 = /dev/nqft3        Unit 3, no rewind-on-close
 665                 16 = /dev/zqft0        Unit 0, rewind-on-close, compression
 666                 17 = /dev/zqft1        Unit 1, rewind-on-close, compression
 667                 18 = /dev/zqft2        Unit 2, rewind-on-close, compression
 668                 19 = /dev/zqft3        Unit 3, rewind-on-close, compression
 669                 20 = /dev/nzqft0       Unit 0, no rewind-on-close, compression
 670                 21 = /dev/nzqft1       Unit 1, no rewind-on-close, compression
 671                 22 = /dev/nzqft2       Unit 2, no rewind-on-close, compression
 672                 23 = /dev/nzqft3       Unit 3, no rewind-on-close, compression
 673                 32 = /dev/rawqft0      Unit 0, rewind-on-close, no file marks
 674                 33 = /dev/rawqft1      Unit 1, rewind-on-close, no file marks
 675                 34 = /dev/rawqft2      Unit 2, rewind-on-close, no file marks
 676                 35 = /dev/rawqft3      Unit 3, rewind-on-close, no file marks
 677                 36 = /dev/nrawqft0     Unit 0, no rewind-on-close, no file marks
 678                 37 = /dev/nrawqft1     Unit 1, no rewind-on-close, no file marks
 679                 38 = /dev/nrawqft2     Unit 2, no rewind-on-close, no file marks
 680                 39 = /dev/nrawqft3     Unit 3, no rewind-on-close, no file marks
 681
 682 27 block       Third Matsushita (Panasonic/SoundBlaster) CD-ROM
 683                  0 = /dev/sbpcd8       Panasonic CD-ROM controller 2 unit 0
 684                  1 = /dev/sbpcd9       Panasonic CD-ROM controller 2 unit 1
 685                  2 = /dev/sbpcd10      Panasonic CD-ROM controller 2 unit 2
 686                  3 = /dev/sbpcd11      Panasonic CD-ROM controller 2 unit 3
 687
 688 28 char        Stallion serial card - card programming
 689                  0 = /dev/staliomem0   First Stallion card I/O memory
 690                  1 = /dev/staliomem1   Second Stallion card I/O memory
 691                  2 = /dev/staliomem2   Third Stallion card I/O memory
 692                  3 = /dev/staliomem3   Fourth Stallion card I/O memory
 693
 694 28 char        Atari SLM ACSI laser printer (68k/Atari)
 695                  0 = /dev/slm0         First SLM laser printer
 696                  1 = /dev/slm1         Second SLM laser printer
 697                    ...
 698 28 block       Fourth Matsushita (Panasonic/SoundBlaster) CD-ROM
 699                  0 = /dev/sbpcd12      Panasonic CD-ROM controller 3 unit 0
 700                  1 = /dev/sbpcd13      Panasonic CD-ROM controller 3 unit 1
 701                  2 = /dev/sbpcd14      Panasonic CD-ROM controller 3 unit 2
 702                  3 = /dev/sbpcd15      Panasonic CD-ROM controller 3 unit 3
 703
 704 28 block       ACSI disk (68k/Atari)
 705                  0 = /dev/ada          First ACSI disk whole disk
 706                 16 = /dev/adb          Second ACSI disk whole disk
 707                 32 = /dev/adc          Third ACSI disk whole disk
 708                    ...
 709                240 = /dev/adp          16th ACSI disk whole disk
 710
 711                Partitions are handled in the same way as for IDE
 712                disks (see major number 3) except that the limit on
 713                partitions is 15, like SCSI.
 714
 715 29 char        Universal frame buffer
 716                  0 = /dev/fb0          First frame buffer
 717                  1 = /dev/fb1          Second frame buffer
 718                    ...
 719                 31 = /dev/fb31         32nd frame buffer
 720
 721 29 block       Aztech/Orchid/Okano/Wearnes CD-ROM
 722                  0 = /dev/aztcd        Aztech CD-ROM
 723
 724 30 char        iBCS-2 compatibility devices
 725                  0 = /dev/socksys      Socket access
 726                  1 = /dev/spx          SVR3 local X interface
 727                 32 = /dev/inet/ip      Network access
 728                 33 = /dev/inet/icmp
 729                 34 = /dev/inet/ggp
 730                 35 = /dev/inet/ipip
 731                 36 = /dev/inet/tcp
 732                 37 = /dev/inet/egp
 733                 38 = /dev/inet/pup
 734                 39 = /dev/inet/udp
 735                 40 = /dev/inet/idp
 736                 41 = /dev/inet/rawip
 737
 738                Additionally, iBCS-2 requires the following links:
 739
 740                /dev/ip -> /dev/inet/ip
 741                /dev/icmp -> /dev/inet/icmp
 742                /dev/ggp -> /dev/inet/ggp
 743                /dev/ipip -> /dev/inet/ipip
 744                /dev/tcp -> /dev/inet/tcp
 745                /dev/egp -> /dev/inet/egp
 746                /dev/pup -> /dev/inet/pup
 747                /dev/udp -> /dev/inet/udp
 748                /dev/idp -> /dev/inet/idp
 749                /dev/rawip -> /dev/inet/rawip
 750                /dev/inet/arp -> /dev/inet/udp
 751                /dev/inet/rip -> /dev/inet/udp
 752                /dev/nfsd -> /dev/socksys
 753                /dev/X0R -> /dev/null (? apparently not required ?)
 754
 755 30 block       Philips LMS CM-205 CD-ROM
 756                  0 = /dev/cm205cd      Philips LMS CM-205 CD-ROM
 757
 758                /dev/lmscd is an older name for this device.  This
 759                driver does not work with the CM-205MS CD-ROM.
 760
 761 31 char        MPU-401 MIDI
 762                  0 = /dev/mpu401data   MPU-401 data port
 763                  1 = /dev/mpu401stat   MPU-401 status port
 764
 765 31 block       ROM/flash memory card
 766                  0 = /dev/rom0         First ROM card (rw)
 767                      ...
 768                  7 = /dev/rom7         Eighth ROM card (rw)
 769                  8 = /dev/rrom0        First ROM card (ro)
 770                    ...
 771                 15 = /dev/rrom7        Eighth ROM card (ro)
 772                 16 = /dev/flash0       First flash memory card (rw)
 773                    ...
 774                 23 = /dev/flash7       Eighth flash memory card (rw)
 775                 24 = /dev/rflash0      First flash memory card (ro)
 776                    ...
 777                 31 = /dev/rflash7      Eighth flash memory card (ro)
 778
 779                The read-write (rw) devices support back-caching
 780                written data in RAM, as well as writing to flash RAM
 781                devices.  The read-only devices (ro) support reading
 782                only.
 783
 784 32 char        Specialix serial card
 785                  0 = /dev/ttyX0        First Specialix port
 786                  1 = /dev/ttyX1        Second Specialix port
 787                    ...
 788 32 block       Philips LMS CM-206 CD-ROM
 789                  0 = /dev/cm206cd      Philips LMS CM-206 CD-ROM
 790
 791 33 char        Specialix serial card - alternate devices
 792                  0 = /dev/cux0         Callout device for ttyX0
 793                  1 = /dev/cux1         Callout device for ttyX1
 794                    ...
 795 33 block       Third IDE hard disk/CD-ROM interface
 796                  0 = /dev/hde          Master: whole disk (or CD-ROM)
 797                 64 = /dev/hdf          Slave: whole disk (or CD-ROM)
 798
 799                Partitions are handled the same way as for the first
 800                interface (see major number 3).
 801
 802 34 char        Z8530 HDLC driver
 803                  0 = /dev/scc0         First Z8530, first port
 804                  1 = /dev/scc1         First Z8530, second port
 805                  2 = /dev/scc2         Second Z8530, first port
 806                  3 = /dev/scc3         Second Z8530, second port
 807                    ...
 808
 809                In a previous version these devices were named
 810                /dev/sc1 for /dev/scc0, /dev/sc2 for /dev/scc1, and so
 811                on.
 812
 813 34 block       Fourth IDE hard disk/CD-ROM interface
 814                  0 = /dev/hdg          Master: whole disk (or CD-ROM)
 815                 64 = /dev/hdh          Slave: whole disk (or CD-ROM)
 816
 817                Partitions are handled the same way as for the first
 818                interface (see major number 3).
 819
 820 35 char        tclmidi MIDI driver
 821                  0 = /dev/midi0        First MIDI port, kernel timed
 822                  1 = /dev/midi1        Second MIDI port, kernel timed
 823                  2 = /dev/midi2        Third MIDI port, kernel timed
 824                  3 = /dev/midi3        Fourth MIDI port, kernel timed
 825                 64 = /dev/rmidi0       First MIDI port, untimed
 826                 65 = /dev/rmidi1       Second MIDI port, untimed
 827                 66 = /dev/rmidi2       Third MIDI port, untimed
 828                 67 = /dev/rmidi3       Fourth MIDI port, untimed
 829                128 = /dev/smpte0       First MIDI port, SMPTE timed
 830                129 = /dev/smpte1       Second MIDI port, SMPTE timed
 831                130 = /dev/smpte2       Third MIDI port, SMPTE timed
 832                131 = /dev/smpte3       Fourth MIDI port, SMPTE timed
 833
 834 35 block       Slow memory ramdisk
 835                  0 = /dev/slram        Slow memory ramdisk
 836
 837 36 char        Netlink support
 838                  0 = /dev/route        Routing, device updates, kernel to user
 839                  1 = /dev/skip         enSKIP security cache control
 840                  3 = /dev/fwmonitor    Firewall packet copies
 841                 16 = /dev/tap0         First Ethertap device
 842                    ...
 843                 31 = /dev/tap15        16th Ethertap device
 844
 845 36 block       MCA ESDI hard disk
 846                  0 = /dev/eda          First ESDI disk whole disk
 847                 64 = /dev/edb          Second ESDI disk whole disk
 848                    ...
 849
 850                Partitions are handled in the same way as IDE disks
 851                (see major number 3).
 852
 853 37 char        IDE tape
 854                  0 = /dev/ht0          First IDE tape
 855                  1 = /dev/ht1          Second IDE tape
 856                    ...
 857                128 = /dev/nht0         First IDE tape, no rewind-on-close
 858                129 = /dev/nht1         Second IDE tape, no rewind-on-close
 859                    ...
 860
 861                Currently, only one IDE tape drive is supported.
 862
 863 37 block       Zorro II ramdisk
 864                  0 = /dev/z2ram        Zorro II ramdisk
 865
 866 38 char        Myricom PCI Myrinet board
 867                  0 = /dev/mlanai0      First Myrinet board
 868                  1 = /dev/mlanai1      Second Myrinet board
 869                    ...
 870
 871                This device is used for status query, board control
 872                and "user level packet I/O."  This board is also
 873                accessible as a standard networking "eth" device.
 874
 875 38 block       Reserved for Linux/AP+
 876
 877 39 char        ML-16P experimental I/O board
 878                  0 = /dev/ml16pa-a0    First card, first analog channel
 879                  1 = /dev/ml16pa-a1    First card, second analog channel
 880                    ...
 881                 15 = /dev/ml16pa-a15   First card, 16th analog channel
 882                 16 = /dev/ml16pa-d     First card, digital lines
 883                 17 = /dev/ml16pa-c0    First card, first counter/timer
 884                 18 = /dev/ml16pa-c1    First card, second counter/timer
 885                 19 = /dev/ml16pa-c2    First card, third counter/timer
 886                 32 = /dev/ml16pb-a0    Second card, first analog channel
 887                 33 = /dev/ml16pb-a1    Second card, second analog channel
 888                    ...
 889                 47 = /dev/ml16pb-a15   Second card, 16th analog channel
 890                 48 = /dev/ml16pb-d     Second card, digital lines
 891                 49 = /dev/ml16pb-c0    Second card, first counter/timer
 892                 50 = /dev/ml16pb-c1    Second card, second counter/timer
 893                 51 = /dev/ml16pb-c2    Second card, third counter/timer
 894                      ...
 895 39 block       Reserved for Linux/AP+
 896
 897 40 char        Matrox Meteor frame grabber {2.6}
 898                  0 = /dev/mmetfgrab    Matrox Meteor frame grabber
 899
 900 40 block       Syquest EZ135 parallel port removable drive
 901                  0 = /dev/eza          Parallel EZ135 drive, whole disk
 902
 903                This device is obsolete and will be removed in a
 904                future version of Linux.  It has been replaced with
 905                the parallel port IDE disk driver at major number 45.
 906                Partitions are handled in the same way as IDE disks
 907                (see major number 3).
 908
 909 41 char        Yet Another Micro Monitor
 910                  0 = /dev/yamm         Yet Another Micro Monitor
 911
 912 41 block       MicroSolutions BackPack parallel port CD-ROM
 913                  0 = /dev/bpcd         BackPack CD-ROM
 914
 915                This device is obsolete and will be removed in a
 916                future version of Linux.  It has been replaced with
 917                the parallel port ATAPI CD-ROM driver at major number 46.
 918
 919 42 char        Demo/sample use
 920
 921 42 block       Demo/sample use
 922
 923                This number is intended for use in sample code, as
 924                well as a general "example" device number.  It
 925                should never be used for a device driver that is being
 926                distributed; either obtain an official number or use
 927                the local/experimental range.  The sudden addition or
 928                removal of a driver with this number should not cause
 929                ill effects to the system (bugs excepted.)
 930
 931                IN PARTICULAR, ANY DISTRIBUTION WHICH CONTAINS A
 932                DEVICE DRIVER USING MAJOR NUMBER 42 IS NONCOMPLIANT.
 933
 934 43 char        isdn4linux virtual modem
 935                  0 = /dev/ttyI0        First virtual modem
 936                    ...
 937                 63 = /dev/ttyI63       64th virtual modem
 938
 939 43 block       Network block devices
 940                  0 = /dev/nb0          First network block device
 941                  1 = /dev/nb1          Second network block device
 942                    ...
 943
 944                Network Block Device is somehow similar to loopback
 945                devices: If you read from it, it sends packet across
 946                network asking server for data. If you write to it, it
 947                sends packet telling server to write. It could be used
 948                to mounting filesystems over the net, swapping over
 949                the net, implementing block device in userland etc.
 950
 951 44 char        isdn4linux virtual modem - alternate devices
 952                  0 = /dev/cui0         Callout device for ttyI0
 953                    ...
 954                 63 = /dev/cui63        Callout device for ttyI63
 955
 956 44 block       Flash Translation Layer (FTL) filesystems
 957                  0 = /dev/ftla         FTL on first Memory Technology Device
 958                 16 = /dev/ftlb         FTL on second Memory Technology Device
 959                 32 = /dev/ftlc         FTL on third Memory Technology Device
 960                    ...
 961                240 = /dev/ftlp         FTL on 16th Memory Technology Device
 962
 963                Partitions are handled in the same way as for IDE
 964                disks (see major number 3) except that the partition
 965                limit is 15 rather than 63 per disk (same as SCSI.)
 966
 967 45 char        isdn4linux ISDN BRI driver
 968                  0 = /dev/isdn0        First virtual B channel raw data
 969                    ...
 970                 63 = /dev/isdn63       64th virtual B channel raw data
 971                 64 = /dev/isdnctrl0    First channel control/debug
 972                    ...
 973                127 = /dev/isdnctrl63   64th channel control/debug
 974
 975                128 = /dev/ippp0        First SyncPPP device
 976                    ...
 977                191 = /dev/ippp63       64th SyncPPP device
 978
 979                255 = /dev/isdninfo     ISDN monitor interface
 980
 981 45 block       Parallel port IDE disk devices
 982                  0 = /dev/pda          First parallel port IDE disk
 983                 16 = /dev/pdb          Second parallel port IDE disk
 984                 32 = /dev/pdc          Third parallel port IDE disk
 985                 48 = /dev/pdd          Fourth parallel port IDE disk
 986
 987                Partitions are handled in the same way as for IDE
 988                disks (see major number 3) except that the partition
 989                limit is 15 rather than 63 per disk.
 990
 991 46 char        Comtrol Rocketport serial card
 992                  0 = /dev/ttyR0        First Rocketport port
 993                  1 = /dev/ttyR1        Second Rocketport port
 994                    ...
 995 46 block       Parallel port ATAPI CD-ROM devices
 996                  0 = /dev/pcd0         First parallel port ATAPI CD-ROM
 997                  1 = /dev/pcd1         Second parallel port ATAPI CD-ROM
 998                  2 = /dev/pcd2         Third parallel port ATAPI CD-ROM
 999                  3 = /dev/pcd3         Fourth parallel port ATAPI CD-ROM
1000
1001 47 char        Comtrol Rocketport serial card - alternate devices
1002                  0 = /dev/cur0         Callout device for ttyR0
1003                  1 = /dev/cur1         Callout device for ttyR1
1004                    ...
1005 47 block       Parallel port ATAPI disk devices
1006                  0 = /dev/pf0          First parallel port ATAPI disk
1007                  1 = /dev/pf1          Second parallel port ATAPI disk
1008                  2 = /dev/pf2          Third parallel port ATAPI disk
1009                  3 = /dev/pf3          Fourth parallel port ATAPI disk
1010
1011                This driver is intended for floppy disks and similar
1012                devices and hence does not support partitioning.
1013
1014 48 char        SDL RISCom serial card
1015                  0 = /dev/ttyL0        First RISCom port
1016                  1 = /dev/ttyL1        Second RISCom port
1017                    ...
1018 48 block       Mylex DAC960 PCI RAID controller; first controller
1019                  0 = /dev/rd/c0d0      First disk, whole disk
1020                  8 = /dev/rd/c0d1      Second disk, whole disk
1021                    ...
1022                248 = /dev/rd/c0d31     32nd disk, whole disk
1023
1024                For partitions add:
1025                  0 = /dev/rd/c?d?      Whole disk
1026                  1 = /dev/rd/c?d?p1    First partition
1027                    ...
1028                  7 = /dev/rd/c?d?p7    Seventh partition
1029
1030 49 char        SDL RISCom serial card - alternate devices
1031                  0 = /dev/cul0         Callout device for ttyL0
1032                  1 = /dev/cul1         Callout device for ttyL1
1033                    ...
1034 49 block       Mylex DAC960 PCI RAID controller; second controller
1035                  0 = /dev/rd/c1d0      First disk, whole disk
1036                  8 = /dev/rd/c1d1      Second disk, whole disk
1037                    ...
1038                248 = /dev/rd/c1d31     32nd disk, whole disk
1039
1040                Partitions are handled as for major 48.
1041
1042 50 char        Reserved for GLINT
1043
1044 50 block       Mylex DAC960 PCI RAID controller; third controller
1045                  0 = /dev/rd/c2d0      First disk, whole disk
1046                  8 = /dev/rd/c2d1      Second disk, whole disk
1047                    ...
1048                248 = /dev/rd/c2d31     32nd disk, whole disk
1049
1050 51 char        Baycom radio modem OR Radio Tech BIM-XXX-RS232 radio modem
1051                  0 = /dev/bc0          First Baycom radio modem
1052                  1 = /dev/bc1          Second Baycom radio modem
1053                    ...
1054 51 block       Mylex DAC960 PCI RAID controller; fourth controller
1055                  0 = /dev/rd/c3d0      First disk, whole disk
1056                  8 = /dev/rd/c3d1      Second disk, whole disk
1057                    ...
1058                248 = /dev/rd/c3d31     32nd disk, whole disk
1059
1060                Partitions are handled as for major 48.
1061
1062 52 char        Spellcaster DataComm/BRI ISDN card
1063                  0 = /dev/dcbri0       First DataComm card
1064                  1 = /dev/dcbri1       Second DataComm card
1065                  2 = /dev/dcbri2       Third DataComm card
1066                  3 = /dev/dcbri3       Fourth DataComm card
1067
1068 52 block       Mylex DAC960 PCI RAID controller; fifth controller
1069                  0 = /dev/rd/c4d0      First disk, whole disk
1070                  8 = /dev/rd/c4d1      Second disk, whole disk
1071                    ...
1072                248 = /dev/rd/c4d31     32nd disk, whole disk
1073
1074                Partitions are handled as for major 48.
1075
1076 53 char        BDM interface for remote debugging MC683xx microcontrollers
1077                  0 = /dev/pd_bdm0      PD BDM interface on lp0
1078                  1 = /dev/pd_bdm1      PD BDM interface on lp1
1079                  2 = /dev/pd_bdm2      PD BDM interface on lp2
1080                  4 = /dev/icd_bdm0     ICD BDM interface on lp0
1081                  5 = /dev/icd_bdm1     ICD BDM interface on lp1
1082                  6 = /dev/icd_bdm2     ICD BDM interface on lp2
1083
1084                This device is used for the interfacing to the MC683xx
1085                microcontrollers via Background Debug Mode by use of a
1086                Parallel Port interface. PD is the Motorola Public
1087                Domain Interface and ICD is the commercial interface
1088                by P&E.
1089
1090 53 block       Mylex DAC960 PCI RAID controller; sixth controller
1091                  0 = /dev/rd/c5d0      First disk, whole disk
1092                  8 = /dev/rd/c5d1      Second disk, whole disk
1093                    ...
1094                248 = /dev/rd/c5d31     32nd disk, whole disk
1095
1096                Partitions are handled as for major 48.
1097
1098 54 char        Electrocardiognosis Holter serial card
1099                  0 = /dev/holter0      First Holter port
1100                  1 = /dev/holter1      Second Holter port
1101                  2 = /dev/holter2      Third Holter port
1102
1103                A custom serial card used by Electrocardiognosis SRL
1104                <mseritan@ottonel.pub.ro> to transfer data from Holter
1105                24-hour heart monitoring equipment.
1106
1107 54 block       Mylex DAC960 PCI RAID controller; seventh controller
1108                  0 = /dev/rd/c6d0      First disk, whole disk
1109                  8 = /dev/rd/c6d1      Second disk, whole disk
1110                    ...
1111                248 = /dev/rd/c6d31     32nd disk, whole disk
1112
1113                Partitions are handled as for major 48.
1114
1115 55 char        DSP56001 digital signal processor
1116                  0 = /dev/dsp56k       First DSP56001
1117
1118 55 block       Mylex DAC960 PCI RAID controller; eighth controller
1119                  0 = /dev/rd/c7d0      First disk, whole disk
1120                  8 = /dev/rd/c7d1      Second disk, whole disk
1121                    ...
1122                248 = /dev/rd/c7d31     32nd disk, whole disk
1123
1124                Partitions are handled as for major 48.
1125
1126 56 char        Apple Desktop Bus
1127                  0 = /dev/adb          ADB bus control
1128
1129                Additional devices will be added to this number, all
1130                starting with /dev/adb.
1131
1132 56 block       Fifth IDE hard disk/CD-ROM interface
1133                  0 = /dev/hdi          Master: whole disk (or CD-ROM)
1134                 64 = /dev/hdj          Slave: whole disk (or CD-ROM)
1135
1136                Partitions are handled the same way as for the first
1137                interface (see major number 3).
1138
1139 57 char        Hayes ESP serial card
1140                  0 = /dev/ttyP0        First ESP port
1141                  1 = /dev/ttyP1        Second ESP port
1142                    ...
1143
1144 57 block       Sixth IDE hard disk/CD-ROM interface
1145                  0 = /dev/hdk          Master: whole disk (or CD-ROM)
1146                 64 = /dev/hdl          Slave: whole disk (or CD-ROM)
1147
1148                Partitions are handled the same way as for the first
1149                interface (see major number 3).
1150
1151 58 char        Hayes ESP serial card - alternate devices
1152                  0 = /dev/cup0         Callout device for ttyP0
1153                  1 = /dev/cup1         Callout device for ttyP1
1154                    ...
1155
1156 58 block       Reserved for logical volume manager
1157
1158 59 char        sf firewall package
1159                  0 = /dev/firewall     Communication with sf kernel module
1160
1161 59 block       Generic PDA filesystem device
1162                  0 = /dev/pda0         First PDA device
1163                  1 = /dev/pda1         Second PDA device
1164                    ...
1165
1166                The pda devices are used to mount filesystems on
1167                remote pda's (basically slow handheld machines with
1168                proprietary OS's and limited memory and storage
1169                running small fs translation drivers) through serial /
1170                IRDA / parallel links.
1171
1172                NAMING CONFLICT -- PROPOSED REVISED NAME /dev/rpda0 etc
1173
1174 60-63 char     LOCAL/EXPERIMENTAL USE
1175
1176 60-63 block    LOCAL/EXPERIMENTAL USE
1177                Allocated for local/experimental use.  For devices not
1178                assigned official numbers, these ranges should be
1179                used in order to avoid conflicting with future assignments.
1180
1181 64 char        ENskip kernel encryption package
1182                  0 = /dev/enskip       Communication with ENskip kernel module
1183
1184 64 block       Scramdisk/DriveCrypt encrypted devices
1185                  0 = /dev/scramdisk/master    Master node for ioctls
1186                  1 = /dev/scramdisk/1         First encrypted device
1187                  2 = /dev/scramdisk/2         Second encrypted device
1188                  ...
1189                255 = /dev/scramdisk/255       255th encrypted device
1190
1191                The filename of the encrypted container and the passwords
1192                are sent via ioctls (using the sdmount tool) to the master
1193                node which then activates them via one of the
1194                /dev/scramdisk/x nodes for loop mounting (all handled
1195                through the sdmount tool).
1196
1197                Requested by: andy@scramdisklinux.org
1198
1199 65 char        Sundance "plink" Transputer boards (obsolete, unused)
1200                  0 = /dev/plink0       First plink device
1201                  1 = /dev/plink1       Second plink device
1202                  2 = /dev/plink2       Third plink device
1203                  3 = /dev/plink3       Fourth plink device
1204                 64 = /dev/rplink0      First plink device, raw
1205                 65 = /dev/rplink1      Second plink device, raw
1206                 66 = /dev/rplink2      Third plink device, raw
1207                 67 = /dev/rplink3      Fourth plink device, raw
1208                128 = /dev/plink0d      First plink device, debug
1209                129 = /dev/plink1d      Second plink device, debug
1210                130 = /dev/plink2d      Third plink device, debug
1211                131 = /dev/plink3d      Fourth plink device, debug
1212                192 = /dev/rplink0d     First plink device, raw, debug
1213                193 = /dev/rplink1d     Second plink device, raw, debug
1214                194 = /dev/rplink2d     Third plink device, raw, debug
1215                195 = /dev/rplink3d     Fourth plink device, raw, debug
1216
1217                This is a commercial driver; contact James Howes
1218                <jth@prosig.demon.co.uk> for information.
1219
1220 65 block       SCSI disk devices (16-31)
1221                  0 = /dev/sdq          17th SCSI disk whole disk
1222                 16 = /dev/sdr          18th SCSI disk whole disk
1223                 32 = /dev/sds          19th SCSI disk whole disk
1224                    ...
1225                240 = /dev/sdaf         32nd 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 66 char        YARC PowerPC PCI coprocessor card
1232                  0 = /dev/yppcpci0     First YARC card
1233                  1 = /dev/yppcpci1     Second YARC card
1234                    ...
1235
1236 66 block       SCSI disk devices (32-47)
1237                  0 = /dev/sdag         33th SCSI disk whole disk
1238                 16 = /dev/sdah         34th SCSI disk whole disk
1239                 32 = /dev/sdai         35th SCSI disk whole disk
1240                    ...
1241                240 = /dev/sdav         48nd 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 67 char        Coda network file system
1248                  0 = /dev/cfs0         Coda cache manager
1249
1250                See http://www.coda.cs.cmu.edu for information about Coda.
1251
1252 67 block       SCSI disk devices (48-63)
1253                  0 = /dev/sdaw         49th SCSI disk whole disk
1254                 16 = /dev/sdax         50th SCSI disk whole disk
1255                 32 = /dev/sday         51st SCSI disk whole disk
1256                    ...
1257                240 = /dev/sdbl         64th SCSI disk whole disk
1258
1259                Partitions are handled in the same way as for IDE
1260                disks (see major number 3) except that the limit on
1261                partitions is 15.
1262
1263 68 char        CAPI 2.0 interface
1264                  0 = /dev/capi20       Control device
1265                  1 = /dev/capi20.00    First CAPI 2.0 application
1266                  2 = /dev/capi20.01    Second CAPI 2.0 application
1267                    ...
1268                 20 = /dev/capi20.19    19th CAPI 2.0 application
1269
1270                ISDN CAPI 2.0 driver for use with CAPI 2.0
1271                applications; currently supports the AVM B1 card.
1272
1273 68 block       SCSI disk devices (64-79)
1274                  0 = /dev/sdbm         65th SCSI disk whole disk
1275                 16 = /dev/sdbn         66th SCSI disk whole disk
1276                 32 = /dev/sdbo         67th SCSI disk whole disk
1277                    ...
1278                240 = /dev/sdcb         80th SCSI disk whole disk
1279
1280                Partitions are handled in the same way as for IDE
1281                disks (see major number 3) except that the limit on
1282                partitions is 15.
1283
1284 69 char        MA16 numeric accelerator card
1285                  0 = /dev/ma16         Board memory access
1286
1287 69 block       SCSI disk devices (80-95)
1288                  0 = /dev/sdcc         81st SCSI disk whole disk
1289                 16 = /dev/sdcd         82nd SCSI disk whole disk
1290                 32 = /dev/sdce         83th SCSI disk whole disk
1291                    ...
1292                240 = /dev/sdcr         96th SCSI disk whole disk
1293
1294                Partitions are handled in the same way as for IDE
1295                disks (see major number 3) except that the limit on
1296                partitions is 15.
1297
1298 70 char        SpellCaster Protocol Services Interface
1299                  0 = /dev/apscfg       Configuration interface
1300                  1 = /dev/apsauth      Authentication interface
1301                  2 = /dev/apslog       Logging interface
1302                  3 = /dev/apsdbg       Debugging interface
1303                 64 = /dev/apsisdn      ISDN command interface
1304                 65 = /dev/apsasync     Async command interface
1305                128 = /dev/apsmon       Monitor interface
1306
1307 70 block       SCSI disk devices (96-111)
1308                  0 = /dev/sdcs         97th SCSI disk whole disk
1309                 16 = /dev/sdct         98th SCSI disk whole disk
1310                 32 = /dev/sdcu         99th SCSI disk whole disk
1311                    ...
1312                240 = /dev/sddh         112nd SCSI disk whole disk
1313
1314                Partitions are handled in the same way as for IDE
1315                disks (see major number 3) except that the limit on
1316                partitions is 15.
1317
1318 71 char        Computone IntelliPort II serial card
1319                  0 = /dev/ttyF0        IntelliPort II board 0, port 0
1320                  1 = /dev/ttyF1        IntelliPort II board 0, port 1
1321                    ...
1322                 63 = /dev/ttyF63       IntelliPort II board 0, port 63
1323                 64 = /dev/ttyF64       IntelliPort II board 1, port 0
1324                 65 = /dev/ttyF65       IntelliPort II board 1, port 1
1325                    ...
1326                127 = /dev/ttyF127      IntelliPort II board 1, port 63
1327                128 = /dev/ttyF128      IntelliPort II board 2, port 0
1328                129 = /dev/ttyF129      IntelliPort II board 2, port 1
1329                    ...
1330                191 = /dev/ttyF191      IntelliPort II board 2, port 63
1331                192 = /dev/ttyF192      IntelliPort II board 3, port 0
1332                193 = /dev/ttyF193      IntelliPort II board 3, port 1
1333                    ...
1334                255 = /dev/ttyF255      IntelliPort II board 3, port 63
1335
1336 71 block       SCSI disk devices (112-127)
1337                  0 = /dev/sddi         113th SCSI disk whole disk
1338                 16 = /dev/sddj         114th SCSI disk whole disk
1339                 32 = /dev/sddk         115th SCSI disk whole disk
1340                    ...
1341                240 = /dev/sddx         128th SCSI disk whole disk
1342
1343                Partitions are handled in the same way as for IDE
1344                disks (see major number 3) except that the limit on
1345                partitions is 15.
1346
1347 72 char        Computone IntelliPort II serial card - alternate devices
1348                  0 = /dev/cuf0         Callout device for ttyF0
1349                  1 = /dev/cuf1         Callout device for ttyF1
1350                    ...
1351                 63 = /dev/cuf63        Callout device for ttyF63
1352                 64 = /dev/cuf64        Callout device for ttyF64
1353                 65 = /dev/cuf65        Callout device for ttyF65
1354                    ...
1355                127 = /dev/cuf127       Callout device for ttyF127
1356                128 = /dev/cuf128       Callout device for ttyF128
1357                129 = /dev/cuf129       Callout device for ttyF129
1358                    ...
1359                191 = /dev/cuf191       Callout device for ttyF191
1360                192 = /dev/cuf192       Callout device for ttyF192
1361                193 = /dev/cuf193       Callout device for ttyF193
1362                    ...
1363                255 = /dev/cuf255       Callout device for ttyF255
1364
1365 72 block       Compaq Intelligent Drive Array, first controller
1366                  0 = /dev/ida/c0d0     First logical drive whole disk
1367                 16 = /dev/ida/c0d1     Second logical drive whole disk
1368                    ...
1369                240 = /dev/ida/c0d15    16th logical drive whole disk
1370
1371                Partitions are handled the same way as for Mylex
1372                DAC960 (see major number 48) except that the limit on
1373                partitions is 15.
1374
1375 73 char        Computone IntelliPort II serial card - control devices
1376                  0 = /dev/ip2ipl0      Loadware device for board 0
1377                  1 = /dev/ip2stat0     Status device for board 0
1378                  4 = /dev/ip2ipl1      Loadware device for board 1
1379                  5 = /dev/ip2stat1     Status device for board 1
1380                  8 = /dev/ip2ipl2      Loadware device for board 2
1381                  9 = /dev/ip2stat2     Status device for board 2
1382                 12 = /dev/ip2ipl3      Loadware device for board 3
1383                 13 = /dev/ip2stat3     Status device for board 3
1384
1385 73 block       Compaq Intelligent Drive Array, second controller
1386                  0 = /dev/ida/c1d0     First logical drive whole disk
1387                 16 = /dev/ida/c1d1     Second logical drive whole disk
1388                    ...
1389                240 = /dev/ida/c1d15    16th logical drive whole disk
1390
1391                Partitions are handled the same way as for Mylex
1392                DAC960 (see major number 48) except that the limit on
1393                partitions is 15.
1394
1395 74 char        SCI bridge
1396                  0 = /dev/SCI/0        SCI device 0
1397                  1 = /dev/SCI/1        SCI device 1
1398                    ...
1399
1400                Currently for Dolphin Interconnect Solutions' PCI-SCI
1401                bridge.
1402
1403 74 block       Compaq Intelligent Drive Array, third controller
1404                  0 = /dev/ida/c2d0     First logical drive whole disk
1405                 16 = /dev/ida/c2d1     Second logical drive whole disk
1406                    ...
1407                240 = /dev/ida/c2d15    16th logical drive whole disk
1408
1409                Partitions are handled the same way as for Mylex
1410                DAC960 (see major number 48) except that the limit on
1411                partitions is 15.
1412
1413 75 char        Specialix IO8+ serial card
1414                  0 = /dev/ttyW0        First IO8+ port, first card
1415                  1 = /dev/ttyW1        Second IO8+ port, first card
1416                    ...
1417                  8 = /dev/ttyW8        First IO8+ port, second card
1418                    ...
1419
1420 75 block       Compaq Intelligent Drive Array, fourth controller
1421                  0 = /dev/ida/c3d0     First logical drive whole disk
1422                 16 = /dev/ida/c3d1     Second logical drive whole disk
1423                    ...
1424                240 = /dev/ida/c3d15    16th logical drive whole disk
1425
1426                Partitions are handled the same way as for Mylex
1427                DAC960 (see major number 48) except that the limit on
1428                partitions is 15.
1429
1430 76 char        Specialix IO8+ serial card - alternate devices
1431                  0 = /dev/cuw0         Callout device for ttyW0
1432                  1 = /dev/cuw1         Callout device for ttyW1
1433                    ...
1434                  8 = /dev/cuw8         Callout device for ttyW8
1435                    ...
1436
1437 76 block       Compaq Intelligent Drive Array, fifth controller
1438                  0 = /dev/ida/c4d0     First logical drive whole disk
1439                 16 = /dev/ida/c4d1     Second logical drive whole disk
1440                    ...
1441                240 = /dev/ida/c4d15    16th logical drive whole disk
1442
1443                Partitions are handled the same way as for Mylex
1444                DAC960 (see major number 48) except that the limit on
1445                partitions is 15.
1446
1447
1448 77 char        ComScire Quantum Noise Generator
1449                  0 = /dev/qng          ComScire Quantum Noise Generator
1450
1451 77 block       Compaq Intelligent Drive Array, sixth controller
1452                  0 = /dev/ida/c5d0     First logical drive whole disk
1453                 16 = /dev/ida/c5d1     Second logical drive whole disk
1454                    ...
1455                240 = /dev/ida/c5d15    16th logical drive whole disk
1456
1457                Partitions are handled the same way as for Mylex
1458                DAC960 (see major number 48) except that the limit on
1459                partitions is 15.
1460
1461 78 char        PAM Software's multimodem boards
1462                  0 = /dev/ttyM0        First PAM modem
1463                  1 = /dev/ttyM1        Second PAM modem
1464                    ...
1465
1466 78 block       Compaq Intelligent Drive Array, seventh controller
1467                  0 = /dev/ida/c6d0     First logical drive whole disk
1468                 16 = /dev/ida/c6d1     Second logical drive whole disk
1469                    ...
1470                240 = /dev/ida/c6d15    16th logical drive whole disk
1471
1472                Partitions are handled the same way as for Mylex
1473                DAC960 (see major number 48) except that the limit on
1474                partitions is 15.
1475
1476 79 char        PAM Software's multimodem boards - alternate devices
1477                  0 = /dev/cum0         Callout device for ttyM0
1478                  1 = /dev/cum1         Callout device for ttyM1
1479                    ...
1480
1481 79 block       Compaq Intelligent Drive Array, eighth controller
1482                  0 = /dev/ida/c7d0     First logical drive whole disk
1483                 16 = /dev/ida/c7d1     Second logical drive whole disk
1484                    ...
1485                240 = /dev/ida/c715     16th logical drive whole disk
1486
1487                Partitions are handled the same way as for Mylex
1488                DAC960 (see major number 48) except that the limit on
1489                partitions is 15.
1490
1491 80 char        Photometrics AT200 CCD camera
1492                  0 = /dev/at200        Photometrics AT200 CCD camera
1493
1494 80 block       I2O hard disk
1495                  0 = /dev/i2o/hda      First I2O hard disk, whole disk
1496                 16 = /dev/i2o/hdb      Second I2O hard disk, whole disk
1497                    ...
1498                240 = /dev/i2o/hdp      16th I2O hard disk, whole disk
1499
1500                Partitions are handled in the same way as for IDE
1501                disks (see major number 3) except that the limit on
1502                partitions is 15.
1503
1504 81 char        video4linux
1505                  0 = /dev/video0       Video capture/overlay device
1506                    ...
1507                 63 = /dev/video63      Video capture/overlay device
1508                 64 = /dev/radio0       Radio device
1509                    ...
1510                127 = /dev/radio63      Radio device
1511                192 = /dev/vtx0         Teletext device
1512                    ...
1513                223 = /dev/vtx31        Teletext device
1514                224 = /dev/vbi0         Vertical blank interrupt
1515                    ...
1516                255 = /dev/vbi31        Vertical blank interrupt
1517
1518 81 block       I2O hard disk
1519                  0 = /dev/i2o/hdq      17th I2O hard disk, whole disk
1520                 16 = /dev/i2o/hdr      18th I2O hard disk, whole disk
1521                    ...
1522                240 = /dev/i2o/hdaf     32nd I2O hard disk, whole disk
1523
1524                Partitions are handled in the same way as for IDE
1525                disks (see major number 3) except that the limit on
1526                partitions is 15.
1527
1528 82 char        WiNRADiO communications receiver card
1529                  0 = /dev/winradio0    First WiNRADiO card
1530                  1 = /dev/winradio1    Second WiNRADiO card
1531                    ...
1532
1533                The driver and documentation may be obtained from
1534                http://www.proximity.com.au/~brian/winradio/
1535
1536 82 block       I2O hard disk
1537                  0 = /dev/i2o/hdag     33rd I2O hard disk, whole disk
1538                 16 = /dev/i2o/hdah     34th I2O hard disk, whole disk
1539                    ...
1540                240 = /dev/i2o/hdav     48th I2O hard disk, whole disk
1541
1542                Partitions are handled in the same way as for IDE
1543                disks (see major number 3) except that the limit on
1544                partitions is 15.
1545
1546 83 char        Matrox mga_vid video driver
1547                 0 = /dev/mga_vid0      1st video card
1548                 1 = /dev/mga_vid1      2nd video card
1549                 2 = /dev/mga_vid2      3rd video card
1550                  ...
1551                15 = /dev/mga_vid15     16th video card
1552
1553 83 block       I2O hard disk
1554                  0 = /dev/i2o/hdaw     49th I2O hard disk, whole disk
1555                 16 = /dev/i2o/hdax     50th I2O hard disk, whole disk
1556                    ...
1557                240 = /dev/i2o/hdbl     64th I2O hard disk, whole disk
1558
1559                Partitions are handled in the same way as for IDE
1560                disks (see major number 3) except that the limit on
1561                partitions is 15.
1562
1563 84 char        Ikon 1011[57] Versatec Greensheet Interface
1564                  0 = /dev/ihcp0        First Greensheet port
1565                  1 = /dev/ihcp1        Second Greensheet port
1566
1567 84 block       I2O hard disk
1568                  0 = /dev/i2o/hdbm     65th I2O hard disk, whole disk
1569                 16 = /dev/i2o/hdbn     66th I2O hard disk, whole disk
1570                    ...
1571                240 = /dev/i2o/hdcb     80th 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 85 char        Linux/SGI shared memory input queue
1578                  0 = /dev/shmiq        Master shared input queue
1579                  1 = /dev/qcntl0       First device pushed
1580                  2 = /dev/qcntl1       Second device pushed
1581                    ...
1582
1583 85 block       I2O hard disk
1584                  0 = /dev/i2o/hdcc     81st I2O hard disk, whole disk
1585                 16 = /dev/i2o/hdcd     82nd I2O hard disk, whole disk
1586                    ...
1587                240 = /dev/i2o/hdcr     96th I2O hard disk, whole disk
1588
1589                Partitions are handled in the same way as for IDE
1590                disks (see major number 3) except that the limit on
1591                partitions is 15.
1592
1593 86 char        SCSI media changer
1594                  0 = /dev/sch0         First SCSI media changer
1595                  1 = /dev/sch1         Second SCSI media changer
1596                    ...
1597
1598 86 block       I2O hard disk
1599                  0 = /dev/i2o/hdcs     97th I2O hard disk, whole disk
1600                 16 = /dev/i2o/hdct     98th I2O hard disk, whole disk
1601                    ...
1602                240 = /dev/i2o/hddh     112th I2O hard disk, whole disk
1603
1604                Partitions are handled in the same way as for IDE
1605                disks (see major number 3) except that the limit on
1606                partitions is 15.
1607
1608 87 char        Sony Control-A1 stereo control bus
1609                  0 = /dev/controla0    First device on chain
1610                  1 = /dev/controla1    Second device on chain
1611                    ...
1612
1613 87 block       I2O hard disk
1614                  0 = /dev/i2o/hddi     113rd I2O hard disk, whole disk
1615                 16 = /dev/i2o/hddj     114th I2O hard disk, whole disk
1616                    ...
1617                240 = /dev/i2o/hddx     128th I2O hard disk, whole disk
1618
1619                Partitions are handled in the same way as for IDE
1620                disks (see major number 3) except that the limit on
1621                partitions is 15.
1622
1623 88 char        COMX synchronous serial card
1624                  0 = /dev/comx0        COMX channel 0
1625                  1 = /dev/comx1        COMX channel 1
1626                    ...
1627
1628 88 block       Seventh IDE hard disk/CD-ROM interface
1629                  0 = /dev/hdm          Master: whole disk (or CD-ROM)
1630                 64 = /dev/hdn          Slave: whole disk (or CD-ROM)
1631
1632                Partitions are handled the same way as for the first
1633                interface (see major number 3).
1634
1635 89 char        I2C bus interface
1636                  0 = /dev/i2c-0        First I2C adapter
1637                  1 = /dev/i2c-1        Second I2C adapter
1638                    ...
1639
1640 89 block       Eighth IDE hard disk/CD-ROM interface
1641                  0 = /dev/hdo          Master: whole disk (or CD-ROM)
1642                 64 = /dev/hdp          Slave: whole disk (or CD-ROM)
1643
1644                Partitions are handled the same way as for the first
1645                interface (see major number 3).
1646
1647 90 char        Memory Technology Device (RAM, ROM, Flash)
1648                  0 = /dev/mtd0         First MTD (rw)
1649                  1 = /dev/mtdr0        First MTD (ro)
1650                    ...
1651                 30 = /dev/mtd15        16th MTD (rw)
1652                 31 = /dev/mtdr15       16th MTD (ro)
1653
1654 90 block       Ninth IDE hard disk/CD-ROM interface
1655                  0 = /dev/hdq          Master: whole disk (or CD-ROM)
1656                 64 = /dev/hdr          Slave: whole disk (or CD-ROM)
1657
1658                Partitions are handled the same way as for the first
1659                interface (see major number 3).
1660
1661 91 char        CAN-Bus devices
1662                  0 = /dev/can0         First CAN-Bus controller
1663                  1 = /dev/can1         Second CAN-Bus controller
1664                    ...
1665
1666 91 block       Tenth IDE hard disk/CD-ROM interface
1667                  0 = /dev/hds          Master: whole disk (or CD-ROM)
1668                 64 = /dev/hdt          Slave: whole disk (or CD-ROM)
1669
1670                Partitions are handled the same way as for the first
1671                interface (see major number 3).
1672
1673 92 char        Reserved for ith Kommunikationstechnik MIC ISDN card
1674
1675 92 block       PPDD encrypted disk driver
1676                  0 = /dev/ppdd0        First encrypted disk
1677                  1 = /dev/ppdd1        Second encrypted disk
1678                    ...
1679
1680                Partitions are handled in the same way as for IDE
1681                disks (see major number 3) except that the limit on
1682                partitions is 15.
1683
1684 93 char        IBM Smart Capture Card frame grabber {2.6}
1685                  0 = /dev/iscc0        First Smart Capture Card
1686                  1 = /dev/iscc1        Second Smart Capture Card
1687                    ...
1688                128 = /dev/isccctl0     First Smart Capture Card control
1689                129 = /dev/isccctl1     Second Smart Capture Card control
1690                    ...
1691
1692 93 block       NAND Flash Translation Layer filesystem
1693                  0 = /dev/nftla        First NFTL layer
1694                 16 = /dev/nftlb        Second NFTL layer
1695                    ...
1696                240 = /dev/nftlp        16th NTFL layer
1697
1698 94 char        miroVIDEO DC10/30 capture/playback device {2.6}
1699                  0 = /dev/dcxx0        First capture card
1700                  1 = /dev/dcxx1        Second capture card
1701                    ...
1702
1703 94 block       IBM S/390 DASD block storage
1704                  0 = /dev/dasda First DASD device, major
1705                  1 = /dev/dasda1 First DASD device, block 1
1706                  2 = /dev/dasda2 First DASD device, block 2
1707                  3 = /dev/dasda3 First DASD device, block 3
1708                  4 = /dev/dasdb Second DASD device, major
1709                  5 = /dev/dasdb1 Second DASD device, block 1
1710                  6 = /dev/dasdb2 Second DASD device, block 2
1711                  7 = /dev/dasdb3 Second DASD device, block 3
1712                    ...
1713
1714 95 char        IP filter
1715                  0 = /dev/ipl          Filter control device/log file
1716                  1 = /dev/ipnat        NAT control device/log file
1717                  2 = /dev/ipstate      State information log file
1718                  3 = /dev/ipauth       Authentication control device/log file
1719                    ...
1720
1721 96 char        Parallel port ATAPI tape devices
1722                  0 = /dev/pt0          First parallel port ATAPI tape
1723                  1 = /dev/pt1          Second parallel port ATAPI tape
1724                    ...
1725                128 = /dev/npt0         First p.p. ATAPI tape, no rewind
1726                129 = /dev/npt1         Second p.p. ATAPI tape, no rewind
1727                    ...
1728
1729 96 block       Inverse NAND Flash Translation Layer
1730                  0 = /dev/inftla First INFTL layer
1731                 16 = /dev/inftlb Second INFTL layer
1732                    ...
1733                240 = /dev/inftlp       16th INTFL layer
1734
1735 97 char        Parallel port generic ATAPI interface
1736                  0 = /dev/pg0          First parallel port ATAPI device
1737                  1 = /dev/pg1          Second parallel port ATAPI device
1738                  2 = /dev/pg2          Third parallel port ATAPI device
1739                  3 = /dev/pg3          Fourth parallel port ATAPI device
1740
1741                These devices support the same API as the generic SCSI
1742                devices.
1743
1744 98 char        Control and Measurement Device (comedi)
1745                  0 = /dev/comedi0      First comedi device
1746                  1 = /dev/comedi1      Second comedi device
1747                    ...
1748
1749                See http://stm.lbl.gov/comedi or http://www.llp.fu-berlin.de/.
1750
1751 98 block       User-mode virtual block device
1752                  0 = /dev/ubda         First user-mode block device
1753                 16 = /dev/udbb         Second user-mode block device
1754                    ...
1755
1756                Partitions are handled in the same way as for IDE
1757                disks (see major number 3) except that the limit on
1758                partitions is 15.
1759
1760                This device is used by the user-mode virtual kernel port.
1761
1762 99 char        Raw parallel ports
1763                  0 = /dev/parport0     First parallel port
1764                  1 = /dev/parport1     Second parallel port
1765                    ...
1766
1767 99 block       JavaStation flash disk
1768                  0 = /dev/jsfd         JavaStation flash disk
1769
1770100 char        Telephony for Linux
1771                  0 = /dev/phone0       First telephony device
1772                  1 = /dev/phone1       Second telephony device
1773                    ...
1774
1775101 char        Motorola DSP 56xxx board
1776                  0 = /dev/mdspstat     Status information
1777                  1 = /dev/mdsp1        First DSP board I/O controls
1778                    ...
1779                 16 = /dev/mdsp16       16th DSP board I/O controls
1780
1781101 block       AMI HyperDisk RAID controller
1782                  0 = /dev/amiraid/ar0  First array whole disk
1783                 16 = /dev/amiraid/ar1  Second array whole disk
1784                    ...
1785                240 = /dev/amiraid/ar15 16th array whole disk
1786
1787                For each device, partitions are added as:
1788                  0 = /dev/amiraid/ar?    Whole disk
1789                  1 = /dev/amiraid/ar?p1  First partition
1790                  2 = /dev/amiraid/ar?p2  Second partition
1791                    ...
1792                 15 = /dev/amiraid/ar?p15 15th partition
1793
1794102 char        Philips SAA5249 Teletext signal decoder {2.6}
1795                  0 = /dev/tlk0         First Teletext decoder
1796                  1 = /dev/tlk1         Second Teletext decoder
1797                  2 = /dev/tlk2         Third Teletext decoder
1798                  3 = /dev/tlk3         Fourth Teletext decoder
1799
1800102 block       Compressed block device
1801                  0 = /dev/cbd/a        First compressed block device, whole device
1802                 16 = /dev/cbd/b        Second compressed block device, whole device
1803                    ...
1804                240 = /dev/cbd/p        16th compressed block device, whole device
1805
1806                Partitions are handled in the same way as for IDE
1807                disks (see major number 3) except that the limit on
1808                partitions is 15.
1809
1810103 char        Arla network file system
1811                  0 = /dev/nnpfs0       First NNPFS device
1812                  1 = /dev/nnpfs1       Second NNPFS device
1813
1814                Arla is a free clone of the Andrew File System, AFS.
1815                The NNPFS device gives user mode filesystem
1816                implementations a kernel presence for caching and easy
1817                mounting.  For more information about the project,
1818                write to <arla-drinkers@stacken.kth.se> or see
1819                http://www.stacken.kth.se/project/arla/
1820
1821103 block       Audit device
1822                  0 = /dev/audit        Audit device
1823
1824104 char        Flash BIOS support
1825
1826104 block       Compaq Next Generation Drive Array, first controller
1827                  0 = /dev/cciss/c0d0   First logical drive, whole disk
1828                 16 = /dev/cciss/c0d1   Second logical drive, whole disk
1829                    ...
1830                240 = /dev/cciss/c0d15  16th logical drive, whole disk
1831
1832                Partitions are handled the same way as for Mylex
1833                DAC960 (see major number 48) except that the limit on
1834                partitions is 15.
1835
1836105 char        Comtrol VS-1000 serial controller
1837                  0 = /dev/ttyV0        First VS-1000 port
1838                  1 = /dev/ttyV1        Second VS-1000 port
1839                    ...
1840
1841105 block       Compaq Next Generation Drive Array, second controller
1842                  0 = /dev/cciss/c1d0   First logical drive, whole disk
1843                 16 = /dev/cciss/c1d1   Second logical drive, whole disk
1844                    ...
1845                240 = /dev/cciss/c1d15  16th logical drive, whole disk
1846
1847                Partitions are handled the same way as for Mylex
1848                DAC960 (see major number 48) except that the limit on
1849                partitions is 15.
1850
1851106 char        Comtrol VS-1000 serial controller - alternate devices
1852                  0 = /dev/cuv0         First VS-1000 port
1853                  1 = /dev/cuv1         Second VS-1000 port
1854                    ...
1855
1856106 block       Compaq Next Generation Drive Array, third controller
1857                  0 = /dev/cciss/c2d0   First logical drive, whole disk
1858                 16 = /dev/cciss/c2d1   Second logical drive, whole disk
1859                    ...
1860                240 = /dev/cciss/c2d15  16th logical drive, whole disk
1861
1862                Partitions are handled the same way as for Mylex
1863                DAC960 (see major number 48) except that the limit on
1864                partitions is 15.
1865
1866107 char        3Dfx Voodoo Graphics device
1867                  0 = /dev/3dfx         Primary 3Dfx graphics device
1868
1869107 block       Compaq Next Generation Drive Array, fourth controller
1870                  0 = /dev/cciss/c3d0   First logical drive, whole disk
1871                 16 = /dev/cciss/c3d1   Second logical drive, whole disk
1872                    ...
1873                240 = /dev/cciss/c3d15  16th logical drive, whole disk
1874
1875                Partitions are handled the same way as for Mylex
1876                DAC960 (see major number 48) except that the limit on
1877                partitions is 15.
1878
1879108 char        Device independent PPP interface
1880                  0 = /dev/ppp          Device independent PPP interface
1881
1882108 block       Compaq Next Generation Drive Array, fifth controller
1883                  0 = /dev/cciss/c4d0   First logical drive, whole disk
1884                 16 = /dev/cciss/c4d1   Second logical drive, whole disk
1885                    ...
1886                240 = /dev/cciss/c4d15  16th logical drive, whole disk
1887
1888                Partitions are handled the same way as for Mylex
1889                DAC960 (see major number 48) except that the limit on
1890                partitions is 15.
1891
1892109 char        Reserved for logical volume manager
1893
1894109 block       Compaq Next Generation Drive Array, sixth controller
1895                  0 = /dev/cciss/c5d0   First logical drive, whole disk
1896                 16 = /dev/cciss/c5d1   Second logical drive, whole disk
1897                    ...
1898                240 = /dev/cciss/c5d15  16th logical drive, whole disk
1899
1900                Partitions are handled the same way as for Mylex
1901                DAC960 (see major number 48) except that the limit on
1902                partitions is 15.
1903
1904110 char        miroMEDIA Surround board
1905                  0 = /dev/srnd0        First miroMEDIA Surround board
1906                  1 = /dev/srnd1        Second miroMEDIA Surround board
1907                    ...
1908
1909110 block       Compaq Next Generation Drive Array, seventh controller
1910                  0 = /dev/cciss/c6d0   First logical drive, whole disk
1911                 16 = /dev/cciss/c6d1   Second logical drive, whole disk
1912                    ...
1913                240 = /dev/cciss/c6d15  16th logical drive, whole disk
1914
1915                Partitions are handled the same way as for Mylex
1916                DAC960 (see major number 48) except that the limit on
1917                partitions is 15.
1918
1919111 char        Philips SAA7146-based audio/video card {2.6}
1920                  0 = /dev/av0          First A/V card
1921                  1 = /dev/av1          Second A/V card
1922                    ...
1923
1924111 block       Compaq Next Generation Drive Array, eighth controller
1925                  0 = /dev/cciss/c7d0   First logical drive, whole disk
1926                 16 = /dev/cciss/c7d1   Second logical drive, whole disk
1927                    ...
1928                240 = /dev/cciss/c7d15  16th logical drive, whole disk
1929
1930                Partitions are handled the same way as for Mylex
1931                DAC960 (see major number 48) except that the limit on
1932                partitions is 15.
1933
1934112 char        ISI serial card
1935                  0 = /dev/ttyM0        First ISI port
1936                  1 = /dev/ttyM1        Second ISI port
1937                    ...
1938
1939                There is currently a device-naming conflict between
1940                these and PAM multimodems (major 78).
1941
1942112 block       IBM iSeries virtual disk
1943                  0 = /dev/iseries/vda  First virtual disk, whole disk
1944                  8 = /dev/iseries/vdb  Second virtual disk, whole disk
1945                    ...
1946                200 = /dev/iseries/vdz  26th virtual disk, whole disk
1947                208 = /dev/iseries/vdaa 27th virtual disk, whole disk
1948                    ...
1949                248 = /dev/iseries/vdaf 32nd virtual disk, whole disk
1950
1951                Partitions are handled in the same way as for IDE
1952                disks (see major number 3) except that the limit on
1953                partitions is 7.
1954
1955113 char        ISI serial card - alternate devices
1956                  0 = /dev/cum0         Callout device for ttyM0
1957                  1 = /dev/cum1         Callout device for ttyM1
1958                    ...
1959
1960113 block       IBM iSeries virtual CD-ROM
1961                  0 = /dev/iseries/vcda First virtual CD-ROM
1962                  1 = /dev/iseries/vcdb Second virtual CD-ROM
1963                    ...
1964
1965114 char        Picture Elements ISE board
1966                  0 = /dev/ise0         First ISE board
1967                  1 = /dev/ise1         Second ISE board
1968                    ...
1969                128 = /dev/isex0        Control node for first ISE board
1970                129 = /dev/isex1        Control node for second ISE board
1971                    ...
1972
1973                The ISE board is an embedded computer, optimized for
1974                image processing. The /dev/iseN nodes are the general
1975                I/O access to the board, the /dev/isex0 nodes command
1976                nodes used to control the board.
1977
1978114 block       IDE BIOS powered software RAID interfaces such as the
1979                Promise Fastrak
1980
1981                  0 = /dev/ataraid/d0
1982                  1 = /dev/ataraid/d0p1
1983                  2 = /dev/ataraid/d0p2
1984                  ...
1985                 16 = /dev/ataraid/d1
1986                 17 = /dev/ataraid/d1p1
1987                 18 = /dev/ataraid/d1p2
1988                  ...
1989                255 = /dev/ataraid/d15p15
1990
1991                Partitions are handled in the same way as for IDE
1992                disks (see major number 3) except that the limit on
1993                partitions is 15.
1994
1995115 char        TI link cable devices (115 was formerly the console driver speaker)
1996                  0 = /dev/tipar0    Parallel cable on first parallel port
1997                  ...
1998                  7 = /dev/tipar7    Parallel cable on seventh parallel port
1999
2000                  8 = /dev/tiser0    Serial cable on first serial port
2001                  ...
2002                 15 = /dev/tiser7    Serial cable on seventh serial port
2003
2004                 16 = /dev/tiusb0    First USB cable
2005                  ...
2006                 47 = /dev/tiusb31   32nd USB cable
2007
2008115 block       NetWare (NWFS) Devices (0-255)
2009
2010                The NWFS (NetWare) devices are used to present a
2011                collection of NetWare Mirror Groups or NetWare
2012                Partitions as a logical storage segment for
2013                use in mounting NetWare volumes.  A maximum of
2014                256 NetWare volumes can be supported in a single
2015                machine.
2016
2017                http://www.kernel.org/pub/linux/kernel/people/jmerkey/nwfs
2018
2019                0 = /dev/nwfs/v0    First NetWare (NWFS) Logical Volume
2020                1 = /dev/nwfs/v1    Second NetWare (NWFS) Logical Volume
2021                2 = /dev/nwfs/v2    Third NetWare (NWFS) Logical Volume
2022                      ...
2023                255 = /dev/nwfs/v255    Last NetWare (NWFS) Logical Volume
2024
2025116 char        Advanced Linux Sound Driver (ALSA)
2026
2027116 block       MicroMemory battery backed RAM adapter (NVRAM)
2028                Supports 16 boards, 15 partitions each.
2029                Requested by neilb at cse.unsw.edu.au.
2030
2031                 0 = /dev/umem/d0      Whole of first board
2032                 1 = /dev/umem/d0p1    First partition of first board
2033                 2 = /dev/umem/d0p2    Second partition of first board
2034                15 = /dev/umem/d0p15   15th partition of first board
2035
2036                16 = /dev/umem/d1      Whole of second board
2037                17 = /dev/umem/d1p1    First partition of second board
2038                    ...
2039                255= /dev/umem/d15p15  15th partition of 16th board.
2040
2041117 char        COSA/SRP synchronous serial card
2042                  0 = /dev/cosa0c0      1st board, 1st channel
2043                  1 = /dev/cosa0c1      1st board, 2nd channel
2044                    ...
2045                 16 = /dev/cosa1c0      2nd board, 1st channel
2046                 17 = /dev/cosa1c1      2nd board, 2nd channel
2047                    ...
2048
2049117 block       Enterprise Volume Management System (EVMS)
2050
2051                The EVMS driver uses a layered, plug-in model to provide
2052                unparalleled flexibility and extensibility in managing
2053                storage.  This allows for easy expansion or customization
2054                of various levels of volume management.  Requested by
2055                Mark Peloquin (peloquin at us.ibm.com).
2056
2057                Note: EVMS populates and manages all the devnodes in
2058                /dev/evms.
2059
2060                http://sf.net/projects/evms
2061
2062                  0 = /dev/evms/block_device   EVMS block device
2063                  1 = /dev/evms/legacyname1    First EVMS legacy device
2064                  2 = /dev/evms/legacyname2    Second EVMS legacy device
2065                    ...
2066                    Both ranges can grow (down or up) until they meet.
2067                    ...
2068                254 = /dev/evms/EVMSname2      Second EVMS native device
2069                255 = /dev/evms/EVMSname1      First EVMS native device
2070
2071                Note: legacyname(s) are derived from the normal legacy
2072                device names.  For example, /dev/hda5 would become
2073                /dev/evms/hda5.
2074
2075118 char        IBM Cryptographic Accelerator
2076                  0 = /dev/ica  Virtual interface to all IBM Crypto Accelerators
2077                  1 = /dev/ica0 IBMCA Device 0
2078                  2 = /dev/ica1 IBMCA Device 1
2079                    ...
2080
2081119 char        VMware virtual network control
2082                  0 = /dev/vmnet0       1st virtual network
2083                  1 = /dev/vmnet1       2nd virtual network
2084                    ...
2085
2086120-127 char    LOCAL/EXPERIMENTAL USE
2087
2088120-127 block   LOCAL/EXPERIMENTAL USE
2089                Allocated for local/experimental use.  For devices not
2090                assigned official numbers, these ranges should be
2091                used in order to avoid conflicting with future assignments.
2092
2093128-135 char    Unix98 PTY masters
2094
2095                These devices should not have corresponding device
2096                nodes; instead they should be accessed through the
2097                /dev/ptmx cloning interface.
2098
2099128 block       SCSI disk devices (128-143)
2100                  0 = /dev/sddy         129th SCSI disk whole disk
2101                 16 = /dev/sddz         130th SCSI disk whole disk
2102                 32 = /dev/sdea         131th SCSI disk whole disk
2103                    ...
2104                240 = /dev/sden         144th SCSI disk whole disk
2105
2106                Partitions are handled in the same way as for IDE
2107                disks (see major number 3) except that the limit on
2108                partitions is 15.
2109
2110129 block       SCSI disk devices (144-159)
2111                  0 = /dev/sdeo         145th SCSI disk whole disk
2112                 16 = /dev/sdep         146th SCSI disk whole disk
2113                 32 = /dev/sdeq         147th SCSI disk whole disk
2114                    ...
2115                240 = /dev/sdfd         160th SCSI disk whole disk
2116
2117                Partitions are handled in the same way as for IDE
2118                disks (see major number 3) except that the limit on
2119                partitions is 15.
2120
2121130 char        (Misc devices)
2122
2123130 block       SCSI disk devices (160-175)
2124                  0 = /dev/sdfe         161st SCSI disk whole disk
2125                 16 = /dev/sdff         162nd SCSI disk whole disk
2126                 32 = /dev/sdfg         163rd SCSI disk whole disk
2127                    ...
2128                240 = /dev/sdft         176th SCSI disk whole disk
2129
2130                Partitions are handled in the same way as for IDE
2131                disks (see major number 3) except that the limit on
2132                partitions is 15.
2133
2134131 block       SCSI disk devices (176-191)
2135                  0 = /dev/sdfu         177th SCSI disk whole disk
2136                 16 = /dev/sdfv         178th SCSI disk whole disk
2137                 32 = /dev/sdfw         179th SCSI disk whole disk
2138                    ...
2139                240 = /dev/sdgj         192nd SCSI disk whole disk
2140
2141                Partitions are handled in the same way as for IDE
2142                disks (see major number 3) except that the limit on
2143                partitions is 15.
2144
2145132 block       SCSI disk devices (192-207)
2146                  0 = /dev/sdgk         193rd SCSI disk whole disk
2147                 16 = /dev/sdgl         194th SCSI disk whole disk
2148                 32 = /dev/sdgm         195th SCSI disk whole disk
2149                    ...
2150                240 = /dev/sdgz         208th SCSI disk whole disk
2151
2152                Partitions are handled in the same way as for IDE
2153                disks (see major number 3) except that the limit on
2154                partitions is 15.
2155
2156133 block       SCSI disk devices (208-223)
2157                  0 = /dev/sdha         209th SCSI disk whole disk
2158                 16 = /dev/sdhb         210th SCSI disk whole disk
2159                 32 = /dev/sdhc         211th SCSI disk whole disk
2160                    ...
2161                240 = /dev/sdhp         224th SCSI disk whole disk
2162
2163                Partitions are handled in the same way as for IDE
2164                disks (see major number 3) except that the limit on
2165                partitions is 15.
2166
2167134 block       SCSI disk devices (224-239)
2168                  0 = /dev/sdhq         225th SCSI disk whole disk
2169                 16 = /dev/sdhr         226th SCSI disk whole disk
2170                 32 = /dev/sdhs         227th SCSI disk whole disk
2171                    ...
2172                240 = /dev/sdif         240th SCSI disk whole disk
2173
2174                Partitions are handled in the same way as for IDE
2175                disks (see major number 3) except that the limit on
2176                partitions is 15.
2177
2178135 block       SCSI disk devices (240-255)
2179                  0 = /dev/sdig         241st SCSI disk whole disk
2180                 16 = /dev/sdih         242nd SCSI disk whole disk
2181                 32 = /dev/sdih         243rd SCSI disk whole disk
2182                    ...
2183                240 = /dev/sdiv         256th SCSI disk whole disk
2184
2185                Partitions are handled in the same way as for IDE
2186                disks (see major number 3) except that the limit on
2187                partitions is 15.
2188
2189136-143 char    Unix98 PTY slaves
2190                  0 = /dev/pts/0        First Unix98 pseudo-TTY
2191                  1 = /dev/pts/1        Second Unix98 pseudo-TTY
2192                    ...
2193
2194                These device nodes are automatically generated with
2195                the proper permissions and modes by mounting the
2196                devpts filesystem onto /dev/pts with the appropriate
2197                mount options (distribution dependent, however, on
2198                *most* distributions the appropriate options are
2199                "mode=0620,gid=<gid of the "tty" group>".)
2200
2201136 block       Mylex DAC960 PCI RAID controller; ninth controller
2202                  0 = /dev/rd/c8d0      First disk, whole disk
2203                  8 = /dev/rd/c8d1      Second disk, whole disk
2204                    ...
2205                248 = /dev/rd/c8d31     32nd disk, whole disk
2206
2207                Partitions are handled as for major 48.
2208
2209137 block       Mylex DAC960 PCI RAID controller; tenth controller
2210                  0 = /dev/rd/c9d0      First disk, whole disk
2211                  8 = /dev/rd/c9d1      Second disk, whole disk
2212                    ...
2213                248 = /dev/rd/c9d31     32nd disk, whole disk
2214
2215                Partitions are handled as for major 48.
2216
2217138 block       Mylex DAC960 PCI RAID controller; eleventh controller
2218                  0 = /dev/rd/c10d0     First disk, whole disk
2219                  8 = /dev/rd/c10d1     Second disk, whole disk
2220                    ...
2221                248 = /dev/rd/c10d31    32nd disk, whole disk
2222
2223                Partitions are handled as for major 48.
2224
2225139 block       Mylex DAC960 PCI RAID controller; twelfth controller
2226                  0 = /dev/rd/c11d0     First disk, whole disk
2227                  8 = /dev/rd/c11d1     Second disk, whole disk
2228                    ...
2229                248 = /dev/rd/c11d31    32nd disk, whole disk
2230
2231                Partitions are handled as for major 48.
2232
2233140 block       Mylex DAC960 PCI RAID controller; thirteenth controller
2234                  0 = /dev/rd/c12d0     First disk, whole disk
2235                  8 = /dev/rd/c12d1     Second disk, whole disk
2236                    ...
2237                248 = /dev/rd/c12d31    32nd disk, whole disk
2238
2239                Partitions are handled as for major 48.
2240
2241141 block       Mylex DAC960 PCI RAID controller; fourteenth controller
2242                  0 = /dev/rd/c13d0     First disk, whole disk
2243                  8 = /dev/rd/c13d1     Second disk, whole disk
2244                    ...
2245                248 = /dev/rd/c13d31    32nd disk, whole disk
2246
2247                Partitions are handled as for major 48.
2248
2249142 block       Mylex DAC960 PCI RAID controller; fifteenth controller
2250                  0 = /dev/rd/c14d0     First disk, whole disk
2251                  8 = /dev/rd/c14d1     Second disk, whole disk
2252                    ...
2253                248 = /dev/rd/c14d31    32nd disk, whole disk
2254
2255                Partitions are handled as for major 48.
2256
2257143 block       Mylex DAC960 PCI RAID controller; sixteenth controller
2258                  0 = /dev/rd/c15d0     First disk, whole disk
2259                  8 = /dev/rd/c15d1     Second disk, whole disk
2260                    ...
2261                248 = /dev/rd/c15d31    32nd disk, whole disk
2262
2263                Partitions are handled as for major 48.
2264
2265144 char        Encapsulated PPP
2266                  0 = /dev/pppox0       First PPP over Ethernet
2267                    ...
2268                 63 = /dev/pppox63      64th PPP over Ethernet
2269
2270                This is primarily used for ADSL.
2271
2272                The SST 5136-DN DeviceNet interface driver has been
2273                relocated to major 183 due to an unfortunate conflict.
2274
2275144 block       Expansion Area #1 for more non-device (e.g. NFS) mounts
2276                  0 = mounted device 256
2277                255 = mounted device 511
2278
2279145 char        SAM9407-based soundcard
2280                  0 = /dev/sam0_mixer
2281                  1 = /dev/sam0_sequencer
2282                  2 = /dev/sam0_midi00
2283                  3 = /dev/sam0_dsp
2284                  4 = /dev/sam0_audio
2285                  6 = /dev/sam0_sndstat
2286                 18 = /dev/sam0_midi01
2287                 34 = /dev/sam0_midi02
2288                 50 = /dev/sam0_midi03
2289                 64 = /dev/sam1_mixer
2290                    ...
2291                128 = /dev/sam2_mixer
2292                    ...
2293                192 = /dev/sam3_mixer
2294                    ...
2295
2296                Device functions match OSS, but offer a number of
2297                addons, which are sam9407 specific.  OSS can be
2298                operated simultaneously, taking care of the codec.
2299
2300145 block       Expansion Area #2 for more non-device (e.g. NFS) mounts
2301                  0 = mounted device 512
2302                255 = mounted device 767
2303
2304146 char        SYSTRAM SCRAMNet mirrored-memory network
2305                  0 = /dev/scramnet0    First SCRAMNet device
2306                  1 = /dev/scramnet1    Second SCRAMNet device
2307                    ...
2308
2309146 block       Expansion Area #3 for more non-device (e.g. NFS) mounts
2310                  0 = mounted device 768
2311                255 = mounted device 1023
2312
2313147 char        Aureal Semiconductor Vortex Audio device
2314                  0 = /dev/aureal0      First Aureal Vortex
2315                  1 = /dev/aureal1      Second Aureal Vortex
2316                    ...
2317
2318147 block       Distributed Replicated Block Device (DRBD)
2319                  0 = /dev/drbd0        First DRBD device
2320                  1 = /dev/drbd1        Second DRBD device
2321                    ...
2322
2323148 char        Technology Concepts serial card
2324                  0 = /dev/ttyT0        First TCL port
2325                  1 = /dev/ttyT1        Second TCL port
2326                    ...
2327
2328149 char        Technology Concepts serial card - alternate devices
2329                  0 = /dev/cut0         Callout device for ttyT0
2330                  1 = /dev/cut0         Callout device for ttyT1
2331                    ...
2332
2333150 char        Real-Time Linux FIFOs
2334                  0 = /dev/rtf0         First RTLinux FIFO
2335                  1 = /dev/rtf1         Second RTLinux FIFO
2336                    ...
2337
2338151 char        DPT I2O SmartRaid V controller
2339                  0 = /dev/dpti0        First DPT I2O adapter
2340                  1 = /dev/dpti1        Second DPT I2O adapter
2341                    ...
2342
2343152 char        EtherDrive Control Device
2344                  0 = /dev/etherd/ctl   Connect/Disconnect an EtherDrive
2345                  1 = /dev/etherd/err   Monitor errors
2346                  2 = /dev/etherd/raw   Raw AoE packet monitor
2347
2348152 block       EtherDrive Block Devices
2349                  0 = /dev/etherd/0     EtherDrive 0
2350                    ...
2351                255 = /dev/etherd/255   EtherDrive 255
2352
2353153 char        SPI Bus Interface (sometimes referred to as MicroWire)
2354                  0 = /dev/spi0         First SPI device on the bus
2355                  1 = /dev/spi1         Second SPI device on the bus
2356                    ...
2357                 15 = /dev/spi15        Sixteenth SPI device on the bus
2358
2359153 block       Enhanced Metadisk RAID (EMD) storage units
2360                  0 = /dev/emd/0        First unit
2361                  1 = /dev/emd/0p1      Partition 1 on First unit
2362                  2 = /dev/emd/0p2      Partition 2 on First unit
2363                    ...
2364                 15 = /dev/emd/0p15     Partition 15 on First unit
2365
2366                 16 = /dev/emd/1        Second unit
2367                 32 = /dev/emd/2        Third unit
2368                    ...
2369                240 = /dev/emd/15       Sixteenth unit
2370
2371                Partitions are handled in the same way as for IDE
2372                disks (see major number 3) except that the limit on
2373                partitions is 15.
2374
2375154 char        Specialix RIO serial card
2376                  0 = /dev/ttySR0       First RIO port
2377                    ...
2378                255 = /dev/ttySR255     256th RIO port
2379
2380155 char        Specialix RIO serial card - alternate devices
2381                  0 = /dev/cusr0        Callout device for ttySR0
2382                    ...
2383                255 = /dev/cusr255      Callout device for ttySR255
2384
2385156 char        Specialix RIO serial card
2386                  0 = /dev/ttySR256     257th RIO port
2387                    ...
2388                255 = /dev/ttySR511     512th RIO port
2389
2390157 char        Specialix RIO serial card - alternate devices
2391                  0 = /dev/cusr256      Callout device for ttySR256
2392                    ...
2393                255 = /dev/cusr511      Callout device for ttySR511
2394
2395158 char        Dialogic GammaLink fax driver
2396                  0 = /dev/gfax0        GammaLink channel 0
2397                  1 = /dev/gfax1        GammaLink channel 1
2398                    ...
2399
2400159 char        RESERVED
2401
2402159 block       RESERVED
2403
2404160 char        General Purpose Instrument Bus (GPIB)
2405                  0 = /dev/gpib0        First GPIB bus
2406                  1 = /dev/gpib1        Second GPIB bus
2407                    ...
2408
2409160 block       Carmel 8-port SATA Disks on First Controller
2410                  0 = /dev/carmel/0     SATA disk 0 whole disk
2411                  1 = /dev/carmel/0p1   SATA disk 0 partition 1
2412                    ...
2413                 31 = /dev/carmel/0p31  SATA disk 0 partition 31
2414
2415                 32 = /dev/carmel/1     SATA disk 1 whole disk
2416                 64 = /dev/carmel/2     SATA disk 2 whole disk
2417                    ...
2418                224 = /dev/carmel/7     SATA disk 7 whole disk
2419
2420                Partitions are handled in the same way as for IDE
2421                disks (see major number 3) except that the limit on
2422                partitions is 31.
2423
2424161 char        IrCOMM devices (IrDA serial/parallel emulation)
2425                  0 = /dev/ircomm0      First IrCOMM device
2426                  1 = /dev/ircomm1      Second IrCOMM device
2427                    ...
2428                 16 = /dev/irlpt0       First IrLPT device
2429                 17 = /dev/irlpt1       Second IrLPT device
2430                    ...
2431
2432161 block       Carmel 8-port SATA Disks on Second Controller
2433                  0 = /dev/carmel/8     SATA disk 8 whole disk
2434                  1 = /dev/carmel/8p1   SATA disk 8 partition 1
2435                    ...
2436                 31 = /dev/carmel/8p31  SATA disk 8 partition 31
2437
2438                 32 = /dev/carmel/9     SATA disk 9 whole disk
2439                 64 = /dev/carmel/10    SATA disk 10 whole disk
2440                    ...
2441                224 = /dev/carmel/15    SATA disk 15 whole disk
2442
2443                Partitions are handled in the same way as for IDE
2444                disks (see major number 3) except that the limit on
2445                partitions is 31.
2446
2447162 char        Raw block device interface
2448                  0 = /dev/rawctl       Raw I/O control device
2449                  1 = /dev/raw/raw1     First raw I/O device
2450                  2 = /dev/raw/raw2     Second raw I/O device
2451                    ...
2452
2453163 char        UNASSIGNED (was Radio Tech BIM-XXX-RS232 radio modem - see 51)
2454
2455164 char        Chase Research AT/PCI-Fast serial card
2456                  0 = /dev/ttyCH0       AT/PCI-Fast board 0, port 0
2457                    ...
2458                 15 = /dev/ttyCH15      AT/PCI-Fast board 0, port 15
2459                 16 = /dev/ttyCH16      AT/PCI-Fast board 1, port 0
2460                    ...
2461                 31 = /dev/ttyCH31      AT/PCI-Fast board 1, port 15
2462                 32 = /dev/ttyCH32      AT/PCI-Fast board 2, port 0
2463                    ...
2464                 47 = /dev/ttyCH47      AT/PCI-Fast board 2, port 15
2465                 48 = /dev/ttyCH48      AT/PCI-Fast board 3, port 0
2466                    ...
2467                 63 = /dev/ttyCH63      AT/PCI-Fast board 3, port 15
2468
2469165 char        Chase Research AT/PCI-Fast serial card - alternate devices
2470                  0 = /dev/cuch0        Callout device for ttyCH0
2471                    ...
2472                 63 = /dev/cuch63       Callout device for ttyCH63
2473
2474166 char        ACM USB modems
2475                  0 = /dev/ttyACM0      First ACM modem
2476                  1 = /dev/ttyACM1      Second ACM modem
2477                    ...
2478
2479167 char        ACM USB modems - alternate devices
2480                  0 = /dev/cuacm0       Callout device for ttyACM0
2481                  1 = /dev/cuacm1       Callout device for ttyACM1
2482                    ...
2483
2484168 char        Eracom CSA7000 PCI encryption adaptor
2485                  0 = /dev/ecsa0        First CSA7000
2486                  1 = /dev/ecsa1        Second CSA7000
2487                    ...
2488
2489169 char        Eracom CSA8000 PCI encryption adaptor
2490                  0 = /dev/ecsa8-0      First CSA8000
2491                  1 = /dev/ecsa8-1      Second CSA8000
2492                    ...
2493
2494170 char        AMI MegaRAC remote access controller
2495                  0 = /dev/megarac0     First MegaRAC card
2496                  1 = /dev/megarac1     Second MegaRAC card
2497                    ...
2498
2499171 char        Reserved for IEEE 1394 (Firewire)
2500
2501172 char        Moxa Intellio serial card
2502                  0 = /dev/ttyMX0       First Moxa port
2503                  1 = /dev/ttyMX1       Second Moxa port
2504                    ...
2505                127 = /dev/ttyMX127     128th Moxa port
2506                128 = /dev/moxactl      Moxa control port
2507
2508173 char        Moxa Intellio serial card - alternate devices
2509                  0 = /dev/cumx0        Callout device for ttyMX0
2510                  1 = /dev/cumx1        Callout device for ttyMX1
2511                    ...
2512                127 = /dev/cumx127      Callout device for ttyMX127
2513
2514174 char        SmartIO serial card
2515                  0 = /dev/ttySI0       First SmartIO port
2516                  1 = /dev/ttySI1       Second SmartIO port
2517                    ...
2518
2519175 char        SmartIO serial card - alternate devices
2520                  0 = /dev/cusi0        Callout device for ttySI0
2521                  1 = /dev/cusi1        Callout device for ttySI1
2522                    ...
2523
2524176 char        nCipher nFast PCI crypto accelerator
2525                  0 = /dev/nfastpci0    First nFast PCI device
2526                  1 = /dev/nfastpci1    First nFast PCI device
2527                    ...
2528
2529177 char        TI PCILynx memory spaces
2530                  0 = /dev/pcilynx/aux0  AUX space of first PCILynx card
2531                    ...
2532                 15 = /dev/pcilynx/aux15 AUX space of 16th PCILynx card
2533                 16 = /dev/pcilynx/rom0  ROM space of first PCILynx card
2534                    ...
2535                 31 = /dev/pcilynx/rom15 ROM space of 16th PCILynx card
2536                 32 = /dev/pcilynx/ram0  RAM space of first PCILynx card
2537                    ...
2538                 47 = /dev/pcilynx/ram15 RAM space of 16th PCILynx card
2539
2540178 char        Giganet cLAN1xxx virtual interface adapter
2541                  0 = /dev/clanvi0      First cLAN adapter
2542                  1 = /dev/clanvi1      Second cLAN adapter
2543                    ...
2544
2545179 char        CCube DVXChip-based PCI products
2546                  0 = /dev/dvxirq0      First DVX device
2547                  1 = /dev/dvxirq1      Second DVX device
2548                    ...
2549
2550180 char        USB devices
2551                  0 = /dev/usb/lp0      First USB printer
2552                    ...
2553                 15 = /dev/usb/lp15     16th USB printer
2554                 48 = /dev/usb/scanner0 First USB scanner
2555                    ...
2556                 63 = /dev/usb/scanner15 16th USB scanner
2557                 64 = /dev/usb/rio500   Diamond Rio 500
2558                 65 = /dev/usb/usblcd   USBLCD Interface (info@usblcd.de)
2559                 66 = /dev/usb/cpad0    Synaptics cPad (mouse/LCD)
2560                 96 = /dev/usb/hiddev0  1st USB HID device
2561                    ...
2562                111 = /dev/usb/hiddev15 16th USB HID device
2563                128 = /dev/usb/brlvgr0  First Braille Voyager device
2564                    ...
2565                131 = /dev/usb/brlvgr3  Fourth Braille Voyager device
2566                132 = /dev/usb/idmouse  ID Mouse (fingerprint scanner) device
2567                133 = /dev/usb/sisusbvga1       First SiSUSB VGA device
2568                    ...
2569                140 = /dev/usb/sisusbvga8       Eighth SISUSB VGA device
2570                144 = /dev/usb/lcd      USB LCD device
2571                160 = /dev/usb/legousbtower0    1st USB Legotower device
2572                    ...
2573                175 = /dev/usb/legousbtower15   16th USB Legotower device
2574                176 = /dev/usb/usbtmc1  First USB TMC device
2575                   ...
2576                192 = /dev/usb/usbtmc16 16th USB TMC device
2577                240 = /dev/usb/dabusb0  First daubusb device
2578                    ...
2579                243 = /dev/usb/dabusb3  Fourth dabusb device
2580
2581180 block       USB block devices
2582                  0 = /dev/uba          First USB block device
2583                  8 = /dev/ubb          Second USB block device
2584                 16 = /dev/ubc          Third USB block device
2585                    ...
2586
2587181 char        Conrad Electronic parallel port radio clocks
2588                  0 = /dev/pcfclock0    First Conrad radio clock
2589                  1 = /dev/pcfclock1    Second Conrad radio clock
2590                    ...
2591
2592182 char        Picture Elements THR2 binarizer
2593                  0 = /dev/pethr0       First THR2 board
2594                  1 = /dev/pethr1       Second THR2 board
2595                    ...
2596
2597183 char        SST 5136-DN DeviceNet interface
2598                  0 = /dev/ss5136dn0    First DeviceNet interface
2599                  1 = /dev/ss5136dn1    Second DeviceNet interface
2600                    ...
2601
2602                This device used to be assigned to major number 144.
2603                It had to be moved due to an unfortunate conflict.
2604
2605184 char        Picture Elements' video simulator/sender
2606                  0 = /dev/pevss0       First sender board
2607                  1 = /dev/pevss1       Second sender board
2608                    ...
2609
2610185 char        InterMezzo high availability file system
2611                  0 = /dev/intermezzo0  First cache manager
2612                  1 = /dev/intermezzo1  Second cache manager
2613                    ...
2614
2615                See http://www.inter-mezzo.org/ for more information.
2616
2617186 char        Object-based storage control device
2618                  0 = /dev/obd0         First obd control device
2619                  1 = /dev/obd1         Second obd control device
2620                    ...
2621
2622                See ftp://ftp.lustre.org/pub/obd for code and information.
2623
2624187 char        DESkey hardware encryption device
2625                  0 = /dev/deskey0      First DES key
2626                  1 = /dev/deskey1      Second DES key
2627                    ...
2628
2629188 char        USB serial converters
2630                  0 = /dev/ttyUSB0      First USB serial converter
2631                  1 = /dev/ttyUSB1      Second USB serial converter
2632                    ...
2633
2634189 char        USB serial converters - alternate devices
2635                  0 = /dev/cuusb0       Callout device for ttyUSB0
2636                  1 = /dev/cuusb1       Callout device for ttyUSB1
2637                    ...
2638
2639190 char        Kansas City tracker/tuner card
2640                  0 = /dev/kctt0        First KCT/T card
2641                  1 = /dev/kctt1        Second KCT/T card
2642                    ...
2643
2644191 char        Reserved for PCMCIA
2645
2646192 char        Kernel profiling interface
2647                  0 = /dev/profile      Profiling control device
2648                  1 = /dev/profile0     Profiling device for CPU 0
2649                  2 = /dev/profile1     Profiling device for CPU 1
2650                    ...
2651
2652193 char        Kernel event-tracing interface
2653                  0 = /dev/trace        Tracing control device
2654                  1 = /dev/trace0       Tracing device for CPU 0
2655                  2 = /dev/trace1       Tracing device for CPU 1
2656                    ...
2657
2658194 char        linVideoStreams (LINVS)
2659                  0 = /dev/mvideo/status0       Video compression status
2660                  1 = /dev/mvideo/stream0       Video stream
2661                  2 = /dev/mvideo/frame0        Single compressed frame
2662                  3 = /dev/mvideo/rawframe0     Raw uncompressed frame
2663                  4 = /dev/mvideo/codec0        Direct codec access
2664                  5 = /dev/mvideo/video4linux0  Video4Linux compatibility
2665
2666                 16 = /dev/mvideo/status1       Second device
2667                    ...
2668                 32 = /dev/mvideo/status2       Third device
2669                    ...
2670                    ...
2671                240 = /dev/mvideo/status15      16th device
2672                    ...
2673
2674195 char        Nvidia graphics devices
2675                  0 = /dev/nvidia0              First Nvidia card
2676                  1 = /dev/nvidia1              Second Nvidia card
2677                    ...
2678                255 = /dev/nvidiactl            Nvidia card control device
2679
2680196 char        Tormenta T1 card
2681                  0 = /dev/tor/0                Master control channel for all cards
2682                  1 = /dev/tor/1                First DS0
2683                  2 = /dev/tor/2                Second DS0
2684                    ...
2685                 48 = /dev/tor/48               48th DS0
2686                 49 = /dev/tor/49               First pseudo-channel
2687                 50 = /dev/tor/50               Second pseudo-channel
2688                    ...
2689
2690197 char        OpenTNF tracing facility
2691                  0 = /dev/tnf/t0               Trace 0 data extraction
2692                  1 = /dev/tnf/t1               Trace 1 data extraction
2693                    ...
2694                128 = /dev/tnf/status           Tracing facility status
2695                130 = /dev/tnf/trace            Tracing device
2696
2697198 char        Total Impact TPMP2 quad coprocessor PCI card
2698                  0 = /dev/tpmp2/0              First card
2699                  1 = /dev/tpmp2/1              Second card
2700                    ...
2701
2702199 char        Veritas volume manager (VxVM) volumes
2703                  0 = /dev/vx/rdsk/*/*          First volume
2704                  1 = /dev/vx/rdsk/*/*          Second volume
2705                    ...
2706
2707199 block       Veritas volume manager (VxVM) volumes
2708                  0 = /dev/vx/dsk/*/*           First volume
2709                  1 = /dev/vx/dsk/*/*           Second volume
2710                    ...
2711
2712                The namespace in these directories is maintained by
2713                the user space VxVM software.
2714
2715200 char        Veritas VxVM configuration interface
2716                  0 = /dev/vx/config            Configuration access node
2717                  1 = /dev/vx/trace             Volume i/o trace access node
2718                  2 = /dev/vx/iod               Volume i/o daemon access node
2719                  3 = /dev/vx/info              Volume information access node
2720                  4 = /dev/vx/task              Volume tasks access node
2721                  5 = /dev/vx/taskmon           Volume tasks monitor daemon
2722
2723201 char        Veritas VxVM dynamic multipathing driver
2724                  0 = /dev/vx/rdmp/*            First multipath device
2725                  1 = /dev/vx/rdmp/*            Second multipath device
2726                    ...
2727201 block       Veritas VxVM dynamic multipathing driver
2728                  0 = /dev/vx/dmp/*             First multipath device
2729                  1 = /dev/vx/dmp/*             Second multipath device
2730                    ...
2731
2732                The namespace in these directories is maintained by
2733                the user space VxVM software.
2734
2735202 char        CPU model-specific registers
2736                  0 = /dev/cpu/0/msr            MSRs on CPU 0
2737                  1 = /dev/cpu/1/msr            MSRs on CPU 1
2738                    ...
2739
2740202 block       Xen Virtual Block Device
2741                  0 = /dev/xvda       First Xen VBD whole disk
2742                  16 = /dev/xvdb      Second Xen VBD whole disk
2743                  32 = /dev/xvdc      Third Xen VBD whole disk
2744                    ...
2745                  240 = /dev/xvdp     Sixteenth Xen VBD whole disk
2746
2747                Partitions are handled in the same way as for IDE
2748                disks (see major number 3) except that the limit on
2749                partitions is 15.
2750
2751203 char        CPU CPUID information
2752                  0 = /dev/cpu/0/cpuid          CPUID on CPU 0
2753                  1 = /dev/cpu/1/cpuid          CPUID on CPU 1
2754                    ...
2755
2756204 char        Low-density serial ports
2757                  0 = /dev/ttyLU0               LinkUp Systems L72xx UART - port 0
2758                  1 = /dev/ttyLU1               LinkUp Systems L72xx UART - port 1
2759                  2 = /dev/ttyLU2               LinkUp Systems L72xx UART - port 2
2760                  3 = /dev/ttyLU3               LinkUp Systems L72xx UART - port 3
2761                  4 = /dev/ttyFB0               Intel Footbridge (ARM)
2762                  5 = /dev/ttySA0               StrongARM builtin serial port 0
2763                  6 = /dev/ttySA1               StrongARM builtin serial port 1
2764                  7 = /dev/ttySA2               StrongARM builtin serial port 2
2765                  8 = /dev/ttySC0               SCI serial port (SuperH) - port 0
2766                  9 = /dev/ttySC1               SCI serial port (SuperH) - port 1
2767                 10 = /dev/ttySC2               SCI serial port (SuperH) - port 2
2768                 11 = /dev/ttySC3               SCI serial port (SuperH) - port 3
2769                 12 = /dev/ttyFW0               Firmware console - port 0
2770                 13 = /dev/ttyFW1               Firmware console - port 1
2771                 14 = /dev/ttyFW2               Firmware console - port 2
2772                 15 = /dev/ttyFW3               Firmware console - port 3
2773                 16 = /dev/ttyAM0               ARM "AMBA" serial port 0
2774                    ...
2775                 31 = /dev/ttyAM15              ARM "AMBA" serial port 15
2776                 32 = /dev/ttyDB0               DataBooster serial port 0
2777                    ...
2778                 39 = /dev/ttyDB7               DataBooster serial port 7
2779                 40 = /dev/ttySG0               SGI Altix console port
2780                 41 = /dev/ttySMX0              Motorola i.MX - port 0
2781                 42 = /dev/ttySMX1              Motorola i.MX - port 1
2782                 43 = /dev/ttySMX2              Motorola i.MX - port 2
2783                 44 = /dev/ttyMM0               Marvell MPSC - port 0
2784                 45 = /dev/ttyMM1               Marvell MPSC - port 1
2785                 46 = /dev/ttyCPM0              PPC CPM (SCC or SMC) - port 0
2786                    ...
2787                 47 = /dev/ttyCPM5              PPC CPM (SCC or SMC) - port 5
2788                 50 = /dev/ttyIOC0              Altix serial card
2789                    ...
2790                 81 = /dev/ttyIOC31             Altix serial card
2791                 82 = /dev/ttyVR0               NEC VR4100 series SIU
2792                 83 = /dev/ttyVR1               NEC VR4100 series DSIU
2793                 84 = /dev/ttyIOC84             Altix ioc4 serial card
2794                    ...
2795                 115 = /dev/ttyIOC115           Altix ioc4 serial card
2796                 116 = /dev/ttySIOC0            Altix ioc3 serial card
2797                    ...
2798                 147 = /dev/ttySIOC31           Altix ioc3 serial card
2799                 148 = /dev/ttyPSC0             PPC PSC - port 0
2800                    ...
2801                 153 = /dev/ttyPSC5             PPC PSC - port 5
2802                 154 = /dev/ttyAT0              ATMEL serial port 0
2803                    ...
2804                 169 = /dev/ttyAT15             ATMEL serial port 15
2805                 170 = /dev/ttyNX0              Hilscher netX serial port 0
2806                    ...
2807                 185 = /dev/ttyNX15             Hilscher netX serial port 15
2808                 186 = /dev/ttyJ0               JTAG1 DCC protocol based serial port emulation
2809                 187 = /dev/ttyUL0              Xilinx uartlite - port 0
2810                    ...
2811                 190 = /dev/ttyUL3              Xilinx uartlite - port 3
2812                 191 = /dev/xvc0                Xen virtual console - port 0
2813
2814205 char        Low-density serial ports (alternate device)
2815                  0 = /dev/culu0                Callout device for ttyLU0
2816                  1 = /dev/culu1                Callout device for ttyLU1
2817                  2 = /dev/culu2                Callout device for ttyLU2
2818                  3 = /dev/culu3                Callout device for ttyLU3
2819                  4 = /dev/cufb0                Callout device for ttyFB0
2820                  5 = /dev/cusa0                Callout device for ttySA0
2821                  6 = /dev/cusa1                Callout device for ttySA1
2822                  7 = /dev/cusa2                Callout device for ttySA2
2823                  8 = /dev/cusc0                Callout device for ttySC0
2824                  9 = /dev/cusc1                Callout device for ttySC1
2825                 10 = /dev/cusc2                Callout device for ttySC2
2826                 11 = /dev/cusc3                Callout device for ttySC3
2827                 12 = /dev/cufw0                Callout device for ttyFW0
2828                 13 = /dev/cufw1                Callout device for ttyFW1
2829                 14 = /dev/cufw2                Callout device for ttyFW2
2830                 15 = /dev/cufw3                Callout device for ttyFW3
2831                 16 = /dev/cuam0                Callout device for ttyAM0
2832                    ...
2833                 31 = /dev/cuam15               Callout device for ttyAM15
2834                 32 = /dev/cudb0                Callout device for ttyDB0
2835                    ...
2836                 39 = /dev/cudb7                Callout device for ttyDB7
2837                 40 = /dev/cusg0                Callout device for ttySG0
2838                 41 = /dev/ttycusmx0            Callout device for ttySMX0
2839                 42 = /dev/ttycusmx1            Callout device for ttySMX1
2840                 43 = /dev/ttycusmx2            Callout device for ttySMX2
2841                 46 = /dev/cucpm0               Callout device for ttyCPM0
2842                    ...
2843                 49 = /dev/cucpm5               Callout device for ttyCPM5
2844                 50 = /dev/cuioc40              Callout device for ttyIOC40
2845                    ...
2846                 81 = /dev/cuioc431             Callout device for ttyIOC431
2847                 82 = /dev/cuvr0                Callout device for ttyVR0
2848                 83 = /dev/cuvr1                Callout device for ttyVR1
2849
2850206 char        OnStream SC-x0 tape devices
2851                  0 = /dev/osst0                First OnStream SCSI tape, mode 0
2852                  1 = /dev/osst1                Second OnStream SCSI tape, mode 0
2853                    ...
2854                 32 = /dev/osst0l               First OnStream SCSI tape, mode 1
2855                 33 = /dev/osst1l               Second OnStream SCSI tape, mode 1
2856                    ...
2857                 64 = /dev/osst0m               First OnStream SCSI tape, mode 2
2858                 65 = /dev/osst1m               Second OnStream SCSI tape, mode 2
2859                    ...
2860                 96 = /dev/osst0a               First OnStream SCSI tape, mode 3
2861                 97 = /dev/osst1a               Second OnStream SCSI tape, mode 3
2862                    ...
2863                128 = /dev/nosst0               No rewind version of /dev/osst0
2864                129 = /dev/nosst1               No rewind version of /dev/osst1
2865                    ...
2866                160 = /dev/nosst0l              No rewind version of /dev/osst0l
2867                161 = /dev/nosst1l              No rewind version of /dev/osst1l
2868                    ...
2869                192 = /dev/nosst0m              No rewind version of /dev/osst0m
2870                193 = /dev/nosst1m              No rewind version of /dev/osst1m
2871                    ...
2872                224 = /dev/nosst0a              No rewind version of /dev/osst0a
2873                225 = /dev/nosst1a              No rewind version of /dev/osst1a
2874                    ...
2875
2876                The OnStream SC-x0 SCSI tapes do not support the
2877                standard SCSI SASD command set and therefore need
2878                their own driver "osst". Note that the IDE, USB (and
2879                maybe ParPort) versions may be driven via ide-scsi or
2880                usb-storage SCSI emulation and this osst device and
2881                driver as well.  The ADR-x0 drives are QIC-157
2882                compliant and don't need osst.
2883
2884207 char        Compaq ProLiant health feature indicate
2885                  0 = /dev/cpqhealth/cpqw       Redirector interface
2886                  1 = /dev/cpqhealth/crom       EISA CROM
2887                  2 = /dev/cpqhealth/cdt        Data Table
2888                  3 = /dev/cpqhealth/cevt       Event Log
2889                  4 = /dev/cpqhealth/casr       Automatic Server Recovery
2890                  5 = /dev/cpqhealth/cecc       ECC Memory
2891                  6 = /dev/cpqhealth/cmca       Machine Check Architecture
2892                  7 = /dev/cpqhealth/ccsm       Deprecated CDT
2893                  8 = /dev/cpqhealth/cnmi       NMI Handling
2894                  9 = /dev/cpqhealth/css        Sideshow Management
2895                 10 = /dev/cpqhealth/cram       CMOS interface
2896                 11 = /dev/cpqhealth/cpci       PCI IRQ interface
2897
2898208 char        User space serial ports
2899                  0 = /dev/ttyU0                First user space serial port
2900                  1 = /dev/ttyU1                Second user space serial port
2901                    ...
2902
2903209 char        User space serial ports (alternate devices)
2904                  0 = /dev/cuu0                 Callout device for ttyU0
2905                  1 = /dev/cuu1                 Callout device for ttyU1
2906                    ...
2907
2908210 char        SBE, Inc. sync/async serial card
2909                  0 = /dev/sbei/wxcfg0          Configuration device for board 0
2910                  1 = /dev/sbei/dld0            Download device for board 0
2911                  2 = /dev/sbei/wan00           WAN device, port 0, board 0
2912                  3 = /dev/sbei/wan01           WAN device, port 1, board 0
2913                  4 = /dev/sbei/wan02           WAN device, port 2, board 0
2914                  5 = /dev/sbei/wan03           WAN device, port 3, board 0
2915                  6 = /dev/sbei/wanc00          WAN clone device, port 0, board 0
2916                  7 = /dev/sbei/wanc01          WAN clone device, port 1, board 0
2917                  8 = /dev/sbei/wanc02          WAN clone device, port 2, board 0
2918                  9 = /dev/sbei/wanc03          WAN clone device, port 3, board 0
2919                 10 = /dev/sbei/wxcfg1          Configuration device for board 1
2920                 11 = /dev/sbei/dld1            Download device for board 1
2921                 12 = /dev/sbei/wan10           WAN device, port 0, board 1
2922                 13 = /dev/sbei/wan11           WAN device, port 1, board 1
2923                 14 = /dev/sbei/wan12           WAN device, port 2, board 1
2924                 15 = /dev/sbei/wan13           WAN device, port 3, board 1
2925                 16 = /dev/sbei/wanc10          WAN clone device, port 0, board 1
2926                 17 = /dev/sbei/wanc11          WAN clone device, port 1, board 1
2927                 18 = /dev/sbei/wanc12          WAN clone device, port 2, board 1
2928                 19 = /dev/sbei/wanc13          WAN clone device, port 3, board 1
2929                    ...
2930
2931                Yes, each board is really spaced 10 (decimal) apart.
2932
2933211 char        Addinum CPCI1500 digital I/O card
2934                  0 = /dev/addinum/cpci1500/0   First CPCI1500 card
2935                  1 = /dev/addinum/cpci1500/1   Second CPCI1500 card
2936                    ...
2937
2938212 char        LinuxTV.org DVB driver subsystem
2939                  0 = /dev/dvb/adapter0/video0    first video decoder of first card
2940                  1 = /dev/dvb/adapter0/audio0    first audio decoder of first card
2941                  2 = /dev/dvb/adapter0/sec0      (obsolete/unused)
2942                  3 = /dev/dvb/adapter0/frontend0 first frontend device of first card
2943                  4 = /dev/dvb/adapter0/demux0    first demux device of first card
2944                  5 = /dev/dvb/adapter0/dvr0      first digital video recoder device of first card
2945                  6 = /dev/dvb/adapter0/ca0       first common access port of first card
2946                  7 = /dev/dvb/adapter0/net0      first network device of first card
2947                  8 = /dev/dvb/adapter0/osd0      first on-screen-display device of first card
2948                  9 = /dev/dvb/adapter0/video1    second video decoder of first card
2949                    ...
2950                 64 = /dev/dvb/adapter1/video0    first video decoder of second card
2951                    ...
2952                128 = /dev/dvb/adapter2/video0    first video decoder of third card
2953                    ...
2954                196 = /dev/dvb/adapter3/video0    first video decoder of fourth card
2955
2956216 char        Bluetooth RFCOMM TTY devices
2957                  0 = /dev/rfcomm0              First Bluetooth RFCOMM TTY device
2958                  1 = /dev/rfcomm1              Second Bluetooth RFCOMM TTY device
2959                    ...
2960
2961217 char        Bluetooth RFCOMM TTY devices (alternate devices)
2962                  0 = /dev/curf0                Callout device for rfcomm0
2963                  1 = /dev/curf1                Callout device for rfcomm1
2964                    ...
2965
2966218 char        The Logical Company bus Unibus/Qbus adapters
2967                  0 = /dev/logicalco/bci/0      First bus adapter
2968                  1 = /dev/logicalco/bci/1      First bus adapter
2969                    ...
2970
2971219 char        The Logical Company DCI-1300 digital I/O card
2972                  0 = /dev/logicalco/dci1300/0  First DCI-1300 card
2973                  1 = /dev/logicalco/dci1300/1  Second DCI-1300 card
2974                    ...
2975
2976220 char        Myricom Myrinet "GM" board
2977                  0 = /dev/myricom/gm0          First Myrinet GM board
2978                  1 = /dev/myricom/gmp0         First board "root access"
2979                  2 = /dev/myricom/gm1          Second Myrinet GM board
2980                  3 = /dev/myricom/gmp1         Second board "root access"
2981                    ...
2982
2983221 char        VME bus
2984                  0 = /dev/bus/vme/m0           First master image
2985                  1 = /dev/bus/vme/m1           Second master image
2986                  2 = /dev/bus/vme/m2           Third master image
2987                  3 = /dev/bus/vme/m3           Fourth master image
2988                  4 = /dev/bus/vme/s0           First slave image
2989                  5 = /dev/bus/vme/s1           Second slave image
2990                  6 = /dev/bus/vme/s2           Third slave image
2991                  7 = /dev/bus/vme/s3           Fourth slave image
2992                  8 = /dev/bus/vme/ctl          Control
2993
2994                It is expected that all VME bus drivers will use the
2995                same interface.  For interface documentation see
2996                http://www.vmelinux.org/.
2997
2998224 char        A2232 serial card
2999                  0 = /dev/ttyY0                First A2232 port
3000                  1 = /dev/ttyY1                Second A2232 port
3001                    ...
3002
3003225 char        A2232 serial card (alternate devices)
3004                  0 = /dev/cuy0                 Callout device for ttyY0
3005                  1 = /dev/cuy1                 Callout device for ttyY1
3006                    ...
3007
3008226 char        Direct Rendering Infrastructure (DRI)
3009                  0 = /dev/dri/card0            First graphics card
3010                  1 = /dev/dri/card1            Second graphics card
3011                    ...
3012
3013227 char        IBM 3270 terminal Unix tty access
3014                  1 = /dev/3270/tty1            First 3270 terminal
3015                  2 = /dev/3270/tty2            Seconds 3270 terminal
3016                    ...
3017
3018228 char        IBM 3270 terminal block-mode access
3019                  0 = /dev/3270/tub             Controlling interface
3020                  1 = /dev/3270/tub1            First 3270 terminal
3021                  2 = /dev/3270/tub2            Second 3270 terminal
3022                    ...
3023
3024229 char        IBM iSeries/pSeries virtual console
3025                  0 = /dev/hvc0                 First console port
3026                  1 = /dev/hvc1                 Second console port
3027                    ...
3028
3029230 char        IBM iSeries virtual tape
3030                  0 = /dev/iseries/vt0          First virtual tape, mode 0
3031                  1 = /dev/iseries/vt1          Second virtual tape, mode 0
3032                    ...
3033                 32 = /dev/iseries/vt0l         First virtual tape, mode 1
3034                 33 = /dev/iseries/vt1l         Second virtual tape, mode 1
3035                    ...
3036                 64 = /dev/iseries/vt0m         First virtual tape, mode 2
3037                 65 = /dev/iseries/vt1m         Second virtual tape, mode 2
3038                    ...
3039                 96 = /dev/iseries/vt0a         First virtual tape, mode 3
3040                 97 = /dev/iseries/vt1a         Second virtual tape, mode 3
3041                      ...
3042                128 = /dev/iseries/nvt0         First virtual tape, mode 0, no rewind
3043                129 = /dev/iseries/nvt1         Second virtual tape, mode 0, no rewind
3044                    ...
3045                160 = /dev/iseries/nvt0l        First virtual tape, mode 1, no rewind
3046                161 = /dev/iseries/nvt1l        Second virtual tape, mode 1, no rewind
3047                    ...
3048                192 = /dev/iseries/nvt0m        First virtual tape, mode 2, no rewind
3049                193 = /dev/iseries/nvt1m        Second virtual tape, mode 2, no rewind
3050                    ...
3051                224 = /dev/iseries/nvt0a        First virtual tape, mode 3, no rewind
3052                225 = /dev/iseries/nvt1a        Second virtual tape, mode 3, no rewind
3053                    ...
3054
3055                "No rewind" refers to the omission of the default
3056                automatic rewind on device close.  The MTREW or MTOFFL
3057                ioctl()'s can be used to rewind the tape regardless of
3058                the device used to access it.
3059
3060231 char        InfiniBand
3061                0 = /dev/infiniband/umad0
3062                1 = /dev/infiniband/umad1
3063                  ...
3064                63 = /dev/infiniband/umad63    63rd InfiniBandMad device
3065                64 = /dev/infiniband/issm0     First InfiniBand IsSM device
3066                65 = /dev/infiniband/issm1     Second InfiniBand IsSM device
3067                  ...
3068                127 = /dev/infiniband/issm63    63rd InfiniBand IsSM device
3069                128 = /dev/infiniband/uverbs0   First InfiniBand verbs device
3070                129 = /dev/infiniband/uverbs1   Second InfiniBand verbs device
3071                  ...
3072                159 = /dev/infiniband/uverbs31  31st InfiniBand verbs device
3073
3074232 char        Biometric Devices
3075                0 = /dev/biometric/sensor0/fingerprint  first fingerprint sensor on first device
3076                1 = /dev/biometric/sensor0/iris         first iris sensor on first device
3077                2 = /dev/biometric/sensor0/retina       first retina sensor on first device
3078                3 = /dev/biometric/sensor0/voiceprint   first voiceprint sensor on first device
3079                4 = /dev/biometric/sensor0/facial       first facial sensor on first device
3080                5 = /dev/biometric/sensor0/hand         first hand sensor on first device
3081                  ...
3082                10 = /dev/biometric/sensor1/fingerprint first fingerprint sensor on second device
3083                  ...
3084                20 = /dev/biometric/sensor2/fingerprint first fingerprint sensor on third device
3085                  ...
3086
3087233 char        PathScale InfiniPath interconnect
3088                0 = /dev/ipath        Primary device for programs (any unit)
3089                1 = /dev/ipath0       Access specifically to unit 0
3090                2 = /dev/ipath1       Access specifically to unit 1
3091                  ...
3092                4 = /dev/ipath3       Access specifically to unit 3
3093                129 = /dev/ipath_sma    Device used by Subnet Management Agent
3094                130 = /dev/ipath_diag   Device used by diagnostics programs
3095
3096234-239         UNASSIGNED
3097
3098240-254 char    LOCAL/EXPERIMENTAL USE
3099
3100240-254 block   LOCAL/EXPERIMENTAL USE
3101                Allocated for local/experimental use.  For devices not
3102                assigned official numbers, these ranges should be
3103                used in order to avoid conflicting with future assignments.
3104
3105255 char        RESERVED
3106
3107255 block       RESERVED
3108
3109                This major is reserved to assist the expansion to a
3110                larger number space.  No device nodes with this major
3111                should ever be created on the filesystem.
3112                (This is probably not true anymore, but I'll leave it
3113                for now /Torben)
3114
3115---LARGE MAJORS!!!!!---
3116
3117256 char        Equinox SST multi-port serial boards
3118                   0 = /dev/ttyEQ0      First serial port on first Equinox SST board
3119                 127 = /dev/ttyEQ127    Last serial port on first Equinox SST board
3120                 128 = /dev/ttyEQ128    First serial port on second Equinox SST board
3121                  ...
3122                1027 = /dev/ttyEQ1027   Last serial port on eighth Equinox SST board
3123
3124256 block       Resident Flash Disk Flash Translation Layer
3125                  0 = /dev/rfda         First RFD FTL layer
3126                 16 = /dev/rfdb         Second RFD FTL layer
3127                  ...
3128                240 = /dev/rfdp         16th RFD FTL layer
3129
3130257 char        Phoenix Technologies Cryptographic Services Driver
3131                  0 = /dev/ptlsec       Crypto Services Driver
3132
3133257 block       SSFDC Flash Translation Layer filesystem
3134                  0 = /dev/ssfdca       First SSFDC layer
3135                  8 = /dev/ssfdcb       Second SSFDC layer
3136                 16 = /dev/ssfdcc       Third SSFDC layer
3137                 24 = /dev/ssfdcd       4th SSFDC layer
3138                 32 = /dev/ssfdce       5th SSFDC layer
3139                 40 = /dev/ssfdcf       6th SSFDC layer
3140                 48 = /dev/ssfdcg       7th SSFDC layer
3141                 56 = /dev/ssfdch       8th SSFDC layer
3142
3143258 block       ROM/Flash read-only translation layer
3144                  0 = /dev/blockrom0    First ROM card's translation layer interface
3145                  1 = /dev/blockrom1    Second ROM card's translation layer interface
3146                  ...
3147
3148 ****   ADDITIONAL /dev DIRECTORY ENTRIES
3149
3150This section details additional entries that should or may exist in
3151the /dev directory.  It is preferred that symbolic links use the same
3152form (absolute or relative) as is indicated here.  Links are
3153classified as "hard" or "symbolic" depending on the preferred type of
3154link; if possible, the indicated type of link should be used.
3155
3156
3157        Compulsory links
3158
3159These links should exist on all systems:
3160
3161/dev/fd         /proc/self/fd   symbolic        File descriptors
3162/dev/stdin      fd/0            symbolic        stdin file descriptor
3163/dev/stdout     fd/1            symbolic        stdout file descriptor
3164/dev/stderr     fd/2            symbolic        stderr file descriptor
3165/dev/nfsd       socksys         symbolic        Required by iBCS-2
3166/dev/X0R        null            symbolic        Required by iBCS-2
3167
3168Note: /dev/X0R is <letter X>-<digit 0>-<letter R>.
3169
3170        Recommended links
3171
3172It is recommended that these links exist on all systems:
3173
3174/dev/core       /proc/kcore     symbolic        Backward compatibility
3175/dev/ramdisk    ram0            symbolic        Backward compatibility
3176/dev/ftape      qft0            symbolic        Backward compatibility
3177/dev/bttv0      video0          symbolic        Backward compatibility
3178/dev/radio      radio0          symbolic        Backward compatibility
3179/dev/i2o*       /dev/i2o/*      symbolic        Backward compatibility
3180/dev/scd?       sr?             hard            Alternate SCSI CD-ROM name
3181
3182        Locally defined links
3183
3184The following links may be established locally to conform to the
3185configuration of the system.  This is merely a tabulation of existing
3186practice, and does not constitute a recommendation.  However, if they
3187exist, they should have the following uses.
3188
3189/dev/mouse      mouse port      symbolic        Current mouse device
3190/dev/tape       tape device     symbolic        Current tape device
3191/dev/cdrom      CD-ROM device   symbolic        Current CD-ROM device
3192/dev/cdwriter   CD-writer       symbolic        Current CD-writer device
3193/dev/scanner    scanner         symbolic        Current scanner device
3194/dev/modem      modem port      symbolic        Current dialout device
3195/dev/root       root device     symbolic        Current root filesystem
3196/dev/swap       swap device     symbolic        Current swap device
3197
3198/dev/modem should not be used for a modem which supports dialin as
3199well as dialout, as it tends to cause lock file problems.  If it
3200exists, /dev/modem should point to the appropriate primary TTY device
3201(the use of the alternate callout devices is deprecated).
3202
3203For SCSI devices, /dev/tape and /dev/cdrom should point to the
3204``cooked'' devices (/dev/st* and /dev/sr*, respectively), whereas
3205/dev/cdwriter and /dev/scanner should point to the appropriate generic
3206SCSI devices (/dev/sg*).
3207
3208/dev/mouse may point to a primary serial TTY device, a hardware mouse
3209device, or a socket for a mouse driver program (e.g. /dev/gpmdata).
3210
3211        Sockets and pipes
3212
3213Non-transient sockets and named pipes may exist in /dev.  Common entries are:
3214
3215/dev/printer    socket          lpd local socket
3216/dev/log        socket          syslog local socket
3217/dev/gpmdata    socket          gpm mouse multiplexer
3218
3219        Mount points
3220
3221The following names are reserved for mounting special filesystems
3222under /dev.  These special filesystems provide kernel interfaces that
3223cannot be provided with standard device nodes.
3224
3225/dev/pts        devpts          PTY slave filesystem
3226/dev/shm        tmpfs           POSIX shared memory maintenance access
3227
3228 ****   TERMINAL DEVICES
3229
3230Terminal, or TTY devices are a special class of character devices.  A
3231terminal device is any device that could act as a controlling terminal
3232for a session; this includes virtual consoles, serial ports, and
3233pseudoterminals (PTYs).
3234
3235All terminal devices share a common set of capabilities known as line
3236disciplines; these include the common terminal line discipline as well
3237as SLIP and PPP modes.
3238
3239All terminal devices are named similarly; this section explains the
3240naming and use of the various types of TTYs.  Note that the naming
3241conventions include several historical warts; some of these are
3242Linux-specific, some were inherited from other systems, and some
3243reflect Linux outgrowing a borrowed convention.
3244
3245A hash mark (#) in a device name is used here to indicate a decimal
3246number without leading zeroes.
3247
3248        Virtual consoles and the console device
3249
3250Virtual consoles are full-screen terminal displays on the system video
3251monitor.  Virtual consoles are named /dev/tty#, with numbering
3252starting at /dev/tty1; /dev/tty0 is the current virtual console.
3253/dev/tty0 is the device that should be used to access the system video
3254card on those architectures for which the frame buffer devices
3255(/dev/fb*) are not applicable.  Do not use /dev/console
3256for this purpose.
3257
3258The console device, /dev/console, is the device to which system
3259messages should be sent, and on which logins should be permitted in
3260single-user mode.  Starting with Linux 2.1.71, /dev/console is managed
3261by the kernel; for previous versions it should be a symbolic link to
3262either /dev/tty0, a specific virtual console such as /dev/tty1, or to
3263a serial port primary (tty*, not cu*) device, depending on the
3264configuration of the system.
3265
3266        Serial ports
3267
3268Serial ports are RS-232 serial ports and any device which simulates
3269one, either in hardware (such as internal modems) or in software (such
3270as the ISDN driver.)  Under Linux, each serial ports has two device
3271names, the primary or callin device and the alternate or callout one.
3272Each kind of device is indicated by a different letter.  For any
3273letter X, the names of the devices are /dev/ttyX# and /dev/cux#,
3274respectively; for historical reasons, /dev/ttyS# and /dev/ttyC#
3275correspond to /dev/cua# and /dev/cub#.  In the future, it should be
3276expected that multiple letters will be used; all letters will be upper
3277case for the "tty" device (e.g. /dev/ttyDP#) and lower case for the
3278"cu" device (e.g. /dev/cudp#).
3279
3280The names /dev/ttyQ# and /dev/cuq# are reserved for local use.
3281
3282The alternate devices provide for kernel-based exclusion and somewhat
3283different defaults than the primary devices.  Their main purpose is to
3284allow the use of serial ports with programs with no inherent or broken
3285support for serial ports.  Their use is deprecated, and they may be
3286removed from a future version of Linux.
3287
3288Arbitration of serial ports is provided by the use of lock files with
3289the names /var/lock/LCK..ttyX#.  The contents of the lock file should
3290be the PID of the locking process as an ASCII number.
3291
3292It is common practice to install links such as /dev/modem
3293which point to serial ports.  In order to ensure proper locking in the
3294presence of these links, it is recommended that software chase
3295symlinks and lock all possible names; additionally, it is recommended
3296that a lock file be installed with the corresponding alternate
3297device.  In order to avoid deadlocks, it is recommended that the locks
3298are acquired in the following order, and released in the reverse:
3299
3300        1. The symbolic link name, if any (/var/lock/LCK..modem)
3301        2. The "tty" name (/var/lock/LCK..ttyS2)
3302        3. The alternate device name (/var/lock/LCK..cua2)
3303
3304In the case of nested symbolic links, the lock files should be
3305installed in the order the symlinks are resolved.
3306
3307Under no circumstances should an application hold a lock while waiting
3308for another to be released.  In addition, applications which attempt
3309to create lock files for the corresponding alternate device names
3310should take into account the possibility of being used on a non-serial
3311port TTY, for which no alternate device would exist.
3312
3313        Pseudoterminals (PTYs)
3314
3315Pseudoterminals, or PTYs, are used to create login sessions or provide
3316other capabilities requiring a TTY line discipline (including SLIP or
3317PPP capability) to arbitrary data-generation processes.  Each PTY has
3318a master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named
3319/dev/tty[p-za-e][0-9a-f].  The kernel arbitrates the use of PTYs by
3320allowing each master side to be opened only once.
3321
3322Once the master side has been opened, the corresponding slave device
3323can be used in the same manner as any TTY device.  The master and
3324slave devices are connected by the kernel, generating the equivalent
3325of a bidirectional pipe with TTY capabilities.
3326
3327Recent versions of the Linux kernels and GNU libc contain support for
3328the System V/Unix98 naming scheme for PTYs, which assigns a common
3329device, /dev/ptmx, to all the masters (opening it will automatically
3330give you a previously unassigned PTY) and a subdirectory, /dev/pts,
3331for the slaves; the slaves are named with decimal integers (/dev/pts/#
3332in our notation).  This removes the problem of exhausting the
3333namespace and enables the kernel to automatically create the device
3334nodes for the slaves on demand using the "devpts" filesystem.
3335
3336