2 LINUX ALLOCATED DEVICES
4 Maintained by John Cagle <device@lanana.org>
6 Last revised: 15 March 2004
8 This list is the Linux Device List, the official registry of allocated
9 device numbers and /dev directory nodes for the Linux operating
12 The latest version of this list is available from
13 http://www.lanana.org/docs/device-list/ or
14 ftp://ftp.kernel.org/pub/linux/docs/device-list/. This version may be
15 newer than the one distributed with the Linux kernel.
17 The LaTeX version of this document is no longer maintained.
19 This document is included by reference into the Filesystem Hierarchy
20 Standard (FHS). The FHS is available from http://www.pathname.com/fhs/.
22 Allocations marked (68k/Amiga) apply to Linux/68k on the Amiga
23 platform only. Allocations marked (68k/Atari) apply to Linux/68k on
24 the Atari platform only.
26 The symbol {2.6} means the allocation is obsolete and scheduled for
27 removal once kernel version 2.6 (or equivalent) is released.
29 This document is in the public domain. The author requests, however,
30 that semantically altered versions are not distributed without
31 permission of the author, assuming the author can be contacted without
32 an unreasonable effort.
34 In particular, please don't sent patches for this list to Linus, at
35 least not without contacting me first.
37 I do not have any information about these devices beyond what appears
38 on this list. Any such information requests will be deleted without
42 **** DEVICE DRIVERS AUTHORS PLEASE READ THIS ****
44 THE DEVICE REGISTRY IS OFFICIALLY FROZEN FOR LINUS TORVALDS' KERNEL
45 TREE. At Linus' request, no more allocations will be made official
46 for Linus' kernel tree; the 3 June 2001 version of this list is the
47 official final version of this registry. At Alan Cox' request,
48 however, the registry will continue to be maintained for the -ac
49 series of kernels, and registrations will be accepted.
51 To have a major number allocated, or a minor number in situations
52 where that applies (e.g. busmice), please contact me with the
53 appropriate device information. Also, if you have additional
54 information regarding any of the devices listed below, or if I have
55 made a mistake, I would greatly appreciate a note.
57 I do, however, make a few requests about the nature of your report.
58 This is necessary for me to be able to keep this list up to date and
59 correct in a timely manner. First of all, *please* send it to the
60 correct address... <device@lanana.org>. I receive hundreds of email
61 messages a day, so mail sent to other addresses may very well get lost
62 in the avalanche. Please put in a descriptive subject, so I can find
63 your mail again should I need to. Too many people send me email
64 saying just "device number request" in the subject.
66 Second, please include a description of the device *in the same format
67 as this list*. The reason for this is that it is the only way I have
68 found to ensure I have all the requisite information to publish your
69 device and avoid conflicts.
71 Third, please don't assume that the distributed version of the list is
72 up to date. Due to the number of registrations I have to maintain it
73 in "batch mode", so there is likely additional registrations that
74 haven't been listed yet.
76 Finally, sometimes I have to play "namespace police." Please don't be
77 offended. I often get submissions for /dev names that would be bound
78 to cause conflicts down the road. I am trying to avoid getting in a
79 situation where we would have to suffer an incompatible forward
80 change. Therefore, please consult with me *before* you make your
81 device names and numbers in any way public, at least to the point
82 where it would be at all difficult to get them changed.
84 Your cooperation is appreciated.
87 0 Unnamed devices (e.g. non-device mounts)
88 0 = reserved as null device number
89 See block major 144, 145, 146 for expansion areas.
92 1 = /dev/mem Physical memory access
93 2 = /dev/kmem Kernel virtual memory access
94 3 = /dev/null Null device
95 4 = /dev/port I/O port access
96 5 = /dev/zero Null byte source
97 6 = /dev/core OBSOLETE - replaced by /proc/kcore
98 7 = /dev/full Returns ENOSPC on write
99 8 = /dev/random Nondeterministic random number gen.
100 9 = /dev/urandom Faster, less secure random number gen.
101 10 = /dev/aio Asyncronous I/O notification interface
102 11 = /dev/kmsg Writes to this come out as printk's
104 0 = /dev/ram0 First RAM disk
105 1 = /dev/ram1 Second RAM disk
107 250 = /dev/initrd Initial RAM disk {2.6}
109 Older kernels had /dev/ramdisk (1, 1) here.
110 /dev/initrd refers to a RAM disk which was preloaded
111 by the boot loader; newer kernels use /dev/ram0 for
114 2 char Pseudo-TTY masters
115 0 = /dev/ptyp0 First PTY master
116 1 = /dev/ptyp1 Second PTY master
118 255 = /dev/ptyef 256th PTY master
120 Pseudo-tty's are named as follows:
121 * Masters are "pty", slaves are "tty";
122 * the fourth letter is one of pqrstuvwxyzabcde indicating
123 the 1st through 16th series of 16 pseudo-ttys each, and
124 * the fifth letter is one of 0123456789abcdef indicating
125 the position within the series.
127 These are the old-style (BSD) PTY devices; Unix98
128 devices are on major 128 and above and use the PTY
129 master multiplex (/dev/ptmx) to acquire a PTY on
133 0 = /dev/fd0 Controller 0, drive 0, autodetect
134 1 = /dev/fd1 Controller 0, drive 1, autodetect
135 2 = /dev/fd2 Controller 0, drive 2, autodetect
136 3 = /dev/fd3 Controller 0, drive 3, autodetect
137 128 = /dev/fd4 Controller 1, drive 0, autodetect
138 129 = /dev/fd5 Controller 1, drive 1, autodetect
139 130 = /dev/fd6 Controller 1, drive 2, autodetect
140 131 = /dev/fd7 Controller 1, drive 3, autodetect
142 To specify format, add to the autodetect device number:
143 0 = /dev/fd? Autodetect format
144 4 = /dev/fd?d360 5.25" 360K in a 360K drive(1)
145 20 = /dev/fd?h360 5.25" 360K in a 1200K drive(1)
146 48 = /dev/fd?h410 5.25" 410K in a 1200K drive
147 64 = /dev/fd?h420 5.25" 420K in a 1200K drive
148 24 = /dev/fd?h720 5.25" 720K in a 1200K drive
149 80 = /dev/fd?h880 5.25" 880K in a 1200K drive(1)
150 8 = /dev/fd?h1200 5.25" 1200K in a 1200K drive(1)
151 40 = /dev/fd?h1440 5.25" 1440K in a 1200K drive(1)
152 56 = /dev/fd?h1476 5.25" 1476K in a 1200K drive
153 72 = /dev/fd?h1494 5.25" 1494K in a 1200K drive
154 92 = /dev/fd?h1600 5.25" 1600K in a 1200K drive(1)
156 12 = /dev/fd?u360 3.5" 360K Double Density(2)
157 16 = /dev/fd?u720 3.5" 720K Double Density(1)
158 120 = /dev/fd?u800 3.5" 800K Double Density(2)
159 52 = /dev/fd?u820 3.5" 820K Double Density
160 68 = /dev/fd?u830 3.5" 830K Double Density
161 84 = /dev/fd?u1040 3.5" 1040K Double Density(1)
162 88 = /dev/fd?u1120 3.5" 1120K Double Density(1)
163 28 = /dev/fd?u1440 3.5" 1440K High Density(1)
164 124 = /dev/fd?u1600 3.5" 1600K High Density(1)
165 44 = /dev/fd?u1680 3.5" 1680K High Density(3)
166 60 = /dev/fd?u1722 3.5" 1722K High Density
167 76 = /dev/fd?u1743 3.5" 1743K High Density
168 96 = /dev/fd?u1760 3.5" 1760K High Density
169 116 = /dev/fd?u1840 3.5" 1840K High Density(3)
170 100 = /dev/fd?u1920 3.5" 1920K High Density(1)
171 32 = /dev/fd?u2880 3.5" 2880K Extra Density(1)
172 104 = /dev/fd?u3200 3.5" 3200K Extra Density
173 108 = /dev/fd?u3520 3.5" 3520K Extra Density
174 112 = /dev/fd?u3840 3.5" 3840K Extra Density(1)
176 36 = /dev/fd?CompaQ Compaq 2880K drive; obsolete?
178 (1) Autodetectable format
179 (2) Autodetectable format in a Double Density (720K) drive only
180 (3) Autodetectable format in a High Density (1440K) drive only
182 NOTE: The letter in the device name (d, q, h or u)
183 signifies the type of drive: 5.25" Double Density (d),
184 5.25" Quad Density (q), 5.25" High Density (h) or 3.5"
185 (any model, u). The use of the capital letters D, H
186 and E for the 3.5" models have been deprecated, since
187 the drive type is insignificant for these devices.
189 3 char Pseudo-TTY slaves
190 0 = /dev/ttyp0 First PTY slave
191 1 = /dev/ttyp1 Second PTY slave
193 255 = /dev/ttyef 256th PTY slave
195 These are the old-style (BSD) PTY devices; Unix98
196 devices are on major 136 and above.
198 3 block First MFM, RLL and IDE hard disk/CD-ROM interface
199 0 = /dev/hda Master: whole disk (or CD-ROM)
200 64 = /dev/hdb Slave: whole disk (or CD-ROM)
202 For partitions, add to the whole disk device number:
203 0 = /dev/hd? Whole disk
204 1 = /dev/hd?1 First partition
205 2 = /dev/hd?2 Second partition
207 63 = /dev/hd?63 63rd partition
209 For Linux/i386, partitions 1-4 are the primary
210 partitions, and 5 and above are logical partitions.
211 Other versions of Linux use partitioning schemes
212 appropriate to their respective architectures.
215 0 = /dev/tty0 Current virtual console
217 1 = /dev/tty1 First virtual console
219 63 = /dev/tty63 63rd virtual console
220 64 = /dev/ttyS0 First UART serial port
222 255 = /dev/ttyS191 192nd UART serial port
224 UART serial ports refer to 8250/16450/16550 series devices.
226 Older versions of the Linux kernel used this major
227 number for BSD PTY devices. As of Linux 2.1.115, this
228 is no longer supported. Use major numbers 2 and 3.
230 4 block Aliases for dynamically allocated major devices to be used
231 when its not possible to create the real device nodes
232 because the root filesystem is mounted read-only.
236 5 char Alternate TTY devices
237 0 = /dev/tty Current TTY device
238 1 = /dev/console System console
239 2 = /dev/ptmx PTY master multiplex
240 64 = /dev/cua0 Callout device for ttyS0
242 255 = /dev/cua191 Callout device for ttyS191
244 (5,1) is /dev/console starting with Linux 2.1.71. See
245 the section on terminal devices for more information
248 6 char Parallel printer devices
249 0 = /dev/lp0 Parallel printer on parport0
250 1 = /dev/lp1 Parallel printer on parport1
253 Current Linux kernels no longer have a fixed mapping
254 between parallel ports and I/O addresses. Instead,
255 they are redirected through the parport multiplex layer.
257 7 char Virtual console capture devices
258 0 = /dev/vcs Current vc text contents
259 1 = /dev/vcs1 tty1 text contents
261 63 = /dev/vcs63 tty63 text contents
262 128 = /dev/vcsa Current vc text/attribute contents
263 129 = /dev/vcsa1 tty1 text/attribute contents
265 191 = /dev/vcsa63 tty63 text/attribute contents
267 NOTE: These devices permit both read and write access.
269 7 block Loopback devices
270 0 = /dev/loop0 First loopback device
271 1 = /dev/loop1 Second loopback device
274 The loopback devices are used to mount filesystems not
275 associated with block devices. The binding to the
276 loopback devices is handled by mount(8) or losetup(8).
278 8 block SCSI disk devices (0-15)
279 0 = /dev/sda First SCSI disk whole disk
280 16 = /dev/sdb Second SCSI disk whole disk
281 32 = /dev/sdc Third SCSI disk whole disk
283 240 = /dev/sdp Sixteenth SCSI disk whole disk
285 Partitions are handled in the same way as for IDE
286 disks (see major number 3) except that the limit on
289 9 char SCSI tape devices
290 0 = /dev/st0 First SCSI tape, mode 0
291 1 = /dev/st1 Second SCSI tape, mode 0
293 32 = /dev/st0l First SCSI tape, mode 1
294 33 = /dev/st1l Second SCSI tape, mode 1
296 64 = /dev/st0m First SCSI tape, mode 2
297 65 = /dev/st1m Second SCSI tape, mode 2
299 96 = /dev/st0a First SCSI tape, mode 3
300 97 = /dev/st1a Second SCSI tape, mode 3
302 128 = /dev/nst0 First SCSI tape, mode 0, no rewind
303 129 = /dev/nst1 Second SCSI tape, mode 0, no rewind
305 160 = /dev/nst0l First SCSI tape, mode 1, no rewind
306 161 = /dev/nst1l Second SCSI tape, mode 1, no rewind
308 192 = /dev/nst0m First SCSI tape, mode 2, no rewind
309 193 = /dev/nst1m Second SCSI tape, mode 2, no rewind
311 224 = /dev/nst0a First SCSI tape, mode 3, no rewind
312 225 = /dev/nst1a Second SCSI tape, mode 3, no rewind
315 "No rewind" refers to the omission of the default
316 automatic rewind on device close. The MTREW or MTOFFL
317 ioctl()'s can be used to rewind the tape regardless of
318 the device used to access it.
320 9 block Metadisk (RAID) devices
321 0 = /dev/md0 First metadisk group
322 1 = /dev/md1 Second metadisk group
325 The metadisk driver is used to span a
326 filesystem across multiple physical disks.
328 10 char Non-serial mice, misc features
329 0 = /dev/logibm Logitech bus mouse
330 1 = /dev/psaux PS/2-style mouse port
331 2 = /dev/inportbm Microsoft Inport bus mouse
332 3 = /dev/atibm ATI XL bus mouse
334 4 = /dev/amigamouse Amiga mouse (68k/Amiga)
335 5 = /dev/atarimouse Atari mouse
336 6 = /dev/sunmouse Sun mouse
337 7 = /dev/amigamouse1 Second Amiga mouse
338 8 = /dev/smouse Simple serial mouse driver
339 9 = /dev/pc110pad IBM PC-110 digitizer pad
340 10 = /dev/adbmouse Apple Desktop Bus mouse
341 11 = /dev/vrtpanel Vr41xx embedded touch panel
342 13 = /dev/vpcmouse Connectix Virtual PC Mouse
343 14 = /dev/touchscreen/ucb1x00 UCB 1x00 touchscreen
344 15 = /dev/touchscreen/mk712 MK712 touchscreen
345 128 = /dev/beep Fancy beep device
346 129 = /dev/modreq Kernel module load request {2.6}
347 130 = /dev/watchdog Watchdog timer port
348 131 = /dev/temperature Machine internal temperature
349 132 = /dev/hwtrap Hardware fault trap
350 133 = /dev/exttrp External device trap
351 134 = /dev/apm_bios Advanced Power Management BIOS
352 135 = /dev/rtc Real Time Clock
353 139 = /dev/openprom SPARC OpenBoot PROM
354 140 = /dev/relay8 Berkshire Products Octal relay card
355 141 = /dev/relay16 Berkshire Products ISO-16 relay card
356 142 = /dev/msr x86 model-specific registers {2.6}
357 143 = /dev/pciconf PCI configuration space
358 144 = /dev/nvram Non-volatile configuration RAM
359 145 = /dev/hfmodem Soundcard shortwave modem control {2.6}
360 146 = /dev/graphics Linux/SGI graphics device
361 147 = /dev/opengl Linux/SGI OpenGL pipe
362 148 = /dev/gfx Linux/SGI graphics effects device
363 149 = /dev/input/mouse Linux/SGI Irix emulation mouse
364 150 = /dev/input/keyboard Linux/SGI Irix emulation keyboard
365 151 = /dev/led Front panel LEDs
366 152 = /dev/kpoll Kernel Poll Driver
367 153 = /dev/mergemem Memory merge device
368 154 = /dev/pmu Macintosh PowerBook power manager
369 155 = /dev/isictl MultiTech ISICom serial control
370 156 = /dev/lcd Front panel LCD display
371 157 = /dev/ac Applicom Intl Profibus card
372 158 = /dev/nwbutton Netwinder external button
373 159 = /dev/nwdebug Netwinder debug interface
374 160 = /dev/nwflash Netwinder flash memory
375 161 = /dev/userdma User-space DMA access
376 162 = /dev/smbus System Management Bus
377 163 = /dev/lik Logitech Internet Keyboard
378 164 = /dev/ipmo Intel Intelligent Platform Management
379 165 = /dev/vmmon VMWare virtual machine monitor
380 166 = /dev/i2o/ctl I2O configuration manager
381 167 = /dev/specialix_sxctl Specialix serial control
382 168 = /dev/tcldrv Technology Concepts serial control
383 169 = /dev/specialix_rioctl Specialix RIO serial control
384 170 = /dev/thinkpad/thinkpad IBM Thinkpad devices
385 171 = /dev/srripc QNX4 API IPC manager
386 172 = /dev/usemaclone Semaphore clone device
387 173 = /dev/ipmikcs Intelligent Platform Management
388 174 = /dev/uctrl SPARCbook 3 microcontroller
389 175 = /dev/agpgart AGP Graphics Address Remapping Table
390 176 = /dev/gtrsc Gorgy Timing radio clock
391 177 = /dev/cbm Serial CBM bus
392 178 = /dev/jsflash JavaStation OS flash SIMM
393 179 = /dev/xsvc High-speed shared-mem/semaphore service
394 180 = /dev/vrbuttons Vr41xx button input device
395 181 = /dev/toshiba Toshiba laptop SMM support
396 182 = /dev/perfctr Performance-monitoring counters
397 183 = /dev/hwrng Generic random number generator
398 184 = /dev/cpu/microcode CPU microcode update interface
399 186 = /dev/atomicps Atomic shapshot of process state data
400 187 = /dev/irnet IrNET device
401 188 = /dev/smbusbios SMBus BIOS
402 189 = /dev/ussp_ctl User space serial port control
403 190 = /dev/crash Mission Critical Linux crash dump facility
404 191 = /dev/pcl181 <information missing>
405 192 = /dev/nas_xbus NAS xbus LCD/buttons access
406 193 = /dev/d7s SPARC 7-segment display
407 194 = /dev/zkshim Zero-Knowledge network shim control
408 195 = /dev/elographics/e2201 Elographics touchscreen E271-2201
409 198 = /dev/sexec Signed executable interface
410 199 = /dev/scanners/cuecat :CueCat barcode scanner
411 200 = /dev/net/tun TAP/TUN network device
412 201 = /dev/button/gulpb Transmeta GULP-B buttons
413 204 = /dev/video/em8300 EM8300 DVD decoder control
414 205 = /dev/video/em8300_mv EM8300 DVD decoder video
415 206 = /dev/video/em8300_ma EM8300 DVD decoder audio
416 207 = /dev/video/em8300_sp EM8300 DVD decoder subpicture
417 208 = /dev/compaq/cpqphpc Compaq PCI Hot Plug Controller
418 209 = /dev/compaq/cpqrid Compaq Remote Insight Driver
419 210 = /dev/impi/bt IMPI coprocessor block transfer
420 211 = /dev/impi/smic IMPI coprocessor stream interface
421 212 = /dev/watchdogs/0 First watchdog device
422 213 = /dev/watchdogs/1 Second watchdog device
423 214 = /dev/watchdogs/2 Third watchdog device
424 215 = /dev/watchdogs/3 Fourth watchdog device
425 216 = /dev/fujitsu/apanel Fujitsu/Siemens application panel
426 217 = /dev/ni/natmotn National Instruments Motion
427 218 = /dev/kchuid Inter-process chuid control
428 219 = /dev/modems/mwave MWave modem firmware upload
429 220 = /dev/mptctl Message passing technology (MPT) control
430 221 = /dev/mvista/hssdsi Montavista PICMG hot swap system driver
431 222 = /dev/mvista/hasi Montavista PICMG high availability
432 223 = /dev/input/uinput User level driver support for input
433 224 = /dev/tpm TCPA TPM driver
434 225 = /dev/pps Pulse Per Second driver
435 226 = /dev/systrace Systrace device
436 227 = /dev/mcelog X86_64 Machine Check Exception driver
437 240-254 Reserved for local use
438 255 Reserved for MISC_DYNAMIC_MINOR
440 11 char Raw keyboard device (Linux/SPARC only)
441 0 = /dev/kbd Raw keyboard device
443 11 char Serial Mux device (Linux/PA-RISC only)
444 0 = /dev/ttyB0 First mux port
445 1 = /dev/ttyB1 Second mux port
448 11 block SCSI CD-ROM devices
449 0 = /dev/scd0 First SCSI CD-ROM
450 1 = /dev/scd1 Second SCSI CD-ROM
453 The prefix /dev/sr (instead of /dev/scd) has been deprecated.
456 2 = /dev/ntpqic11 QIC-11, no rewind-on-close
457 3 = /dev/tpqic11 QIC-11, rewind-on-close
458 4 = /dev/ntpqic24 QIC-24, no rewind-on-close
459 5 = /dev/tpqic24 QIC-24, rewind-on-close
460 6 = /dev/ntpqic120 QIC-120, no rewind-on-close
461 7 = /dev/tpqic120 QIC-120, rewind-on-close
462 8 = /dev/ntpqic150 QIC-150, no rewind-on-close
463 9 = /dev/tpqic150 QIC-150, rewind-on-close
465 The device names specified are proposed -- if there
466 are "standard" names for these devices, please let me know.
468 12 block MSCDEX CD-ROM callback support {2.6}
469 0 = /dev/dos_cd0 First MSCDEX CD-ROM
470 1 = /dev/dos_cd1 Second MSCDEX CD-ROM
474 0 = /dev/input/js0 First joystick
475 1 = /dev/input/js1 Second joystick
477 32 = /dev/input/mouse0 First mouse
478 33 = /dev/input/mouse1 Second mouse
480 63 = /dev/input/mice Unified mouse
481 64 = /dev/input/event0 First event queue
482 65 = /dev/input/event1 Second event queue
485 Each device type has 5 bits (32 minors).
487 13 block 8-bit MFM/RLL/IDE controller
488 0 = /dev/xda First XT disk whole disk
489 64 = /dev/xdb Second XT disk whole disk
491 Partitions are handled in the same way as IDE disks
492 (see major number 3).
494 14 char Open Sound System (OSS)
495 0 = /dev/mixer Mixer control
496 1 = /dev/sequencer Audio sequencer
497 2 = /dev/midi00 First MIDI port
498 3 = /dev/dsp Digital audio
499 4 = /dev/audio Sun-compatible digital audio
500 6 = /dev/sndstat Sound card status information {2.6}
501 7 = /dev/audioctl SPARC audio control device
502 8 = /dev/sequencer2 Sequencer -- alternate device
503 16 = /dev/mixer1 Second soundcard mixer control
504 17 = /dev/patmgr0 Sequencer patch manager
505 18 = /dev/midi01 Second MIDI port
506 19 = /dev/dsp1 Second soundcard digital audio
507 20 = /dev/audio1 Second soundcard Sun digital audio
508 33 = /dev/patmgr1 Sequencer patch manager
509 34 = /dev/midi02 Third MIDI port
510 50 = /dev/midi03 Fourth MIDI port
511 14 block BIOS harddrive callback support {2.6}
512 0 = /dev/dos_hda First BIOS harddrive whole disk
513 64 = /dev/dos_hdb Second BIOS harddrive whole disk
514 128 = /dev/dos_hdc Third BIOS harddrive whole disk
515 192 = /dev/dos_hdd Fourth BIOS harddrive whole disk
517 Partitions are handled in the same way as IDE disks
518 (see major number 3).
521 0 = /dev/js0 First analog joystick
522 1 = /dev/js1 Second analog joystick
524 128 = /dev/djs0 First digital joystick
525 129 = /dev/djs1 Second digital joystick
527 15 block Sony CDU-31A/CDU-33A CD-ROM
528 0 = /dev/sonycd Sony CDU-31a CD-ROM
530 16 char Non-SCSI scanners
531 0 = /dev/gs4500 Genius 4500 handheld scanner
532 16 block GoldStar CD-ROM
533 0 = /dev/gscd GoldStar CD-ROM
535 17 char Chase serial card
536 0 = /dev/ttyH0 First Chase port
537 1 = /dev/ttyH1 Second Chase port
539 17 block Optics Storage CD-ROM
540 0 = /dev/optcd Optics Storage CD-ROM
542 18 char Chase serial card - alternate devices
543 0 = /dev/cuh0 Callout device for ttyH0
544 1 = /dev/cuh1 Callout device for ttyH1
546 18 block Sanyo CD-ROM
547 0 = /dev/sjcd Sanyo CD-ROM
549 19 char Cyclades serial card
550 0 = /dev/ttyC0 First Cyclades port
552 31 = /dev/ttyC31 32nd Cyclades port
553 19 block "Double" compressed disk
554 0 = /dev/double0 First compressed disk
556 7 = /dev/double7 Eighth compressed disk
557 128 = /dev/cdouble0 Mirror of first compressed disk
559 135 = /dev/cdouble7 Mirror of eighth compressed disk
561 See the Double documentation for the meaning of the
564 20 char Cyclades serial card - alternate devices
565 0 = /dev/cub0 Callout device for ttyC0
567 31 = /dev/cub31 Callout device for ttyC31
568 20 block Hitachi CD-ROM (under development)
569 0 = /dev/hitcd Hitachi CD-ROM
571 21 char Generic SCSI access
572 0 = /dev/sg0 First generic SCSI device
573 1 = /dev/sg1 Second generic SCSI device
576 Most distributions name these /dev/sga, /dev/sgb...;
577 this sets an unnecessary limit of 26 SCSI devices in
578 the system and is counter to standard Linux
579 device-naming practice.
581 21 block Acorn MFM hard drive interface
582 0 = /dev/mfma First MFM drive whole disk
583 64 = /dev/mfmb Second MFM drive whole disk
585 This device is used on the ARM-based Acorn RiscPC.
586 Partitions are handled the same way as for IDE disks
587 (see major number 3).
589 22 char Digiboard serial card
590 0 = /dev/ttyD0 First Digiboard port
591 1 = /dev/ttyD1 Second Digiboard port
593 22 block Second IDE hard disk/CD-ROM interface
594 0 = /dev/hdc Master: whole disk (or CD-ROM)
595 64 = /dev/hdd Slave: whole disk (or CD-ROM)
597 Partitions are handled the same way as for the first
598 interface (see major number 3).
600 23 char Digiboard serial card - alternate devices
601 0 = /dev/cud0 Callout device for ttyD0
602 1 = /dev/cud1 Callout device for ttyD1
604 23 block Mitsumi proprietary CD-ROM
605 0 = /dev/mcd Mitsumi CD-ROM
607 24 char Stallion serial card
608 0 = /dev/ttyE0 Stallion port 0 card 0
609 1 = /dev/ttyE1 Stallion port 1 card 0
611 64 = /dev/ttyE64 Stallion port 0 card 1
612 65 = /dev/ttyE65 Stallion port 1 card 1
614 128 = /dev/ttyE128 Stallion port 0 card 2
615 129 = /dev/ttyE129 Stallion port 1 card 2
617 192 = /dev/ttyE192 Stallion port 0 card 3
618 193 = /dev/ttyE193 Stallion port 1 card 3
620 24 block Sony CDU-535 CD-ROM
621 0 = /dev/cdu535 Sony CDU-535 CD-ROM
623 25 char Stallion serial card - alternate devices
624 0 = /dev/cue0 Callout device for ttyE0
625 1 = /dev/cue1 Callout device for ttyE1
627 64 = /dev/cue64 Callout device for ttyE64
628 65 = /dev/cue65 Callout device for ttyE65
630 128 = /dev/cue128 Callout device for ttyE128
631 129 = /dev/cue129 Callout device for ttyE129
633 192 = /dev/cue192 Callout device for ttyE192
634 193 = /dev/cue193 Callout device for ttyE193
636 25 block First Matsushita (Panasonic/SoundBlaster) CD-ROM
637 0 = /dev/sbpcd0 Panasonic CD-ROM controller 0 unit 0
638 1 = /dev/sbpcd1 Panasonic CD-ROM controller 0 unit 1
639 2 = /dev/sbpcd2 Panasonic CD-ROM controller 0 unit 2
640 3 = /dev/sbpcd3 Panasonic CD-ROM controller 0 unit 3
642 26 char Quanta WinVision frame grabber {2.6}
643 0 = /dev/wvisfgrab Quanta WinVision frame grabber
644 26 block Second Matsushita (Panasonic/SoundBlaster) CD-ROM
645 0 = /dev/sbpcd4 Panasonic CD-ROM controller 1 unit 0
646 1 = /dev/sbpcd5 Panasonic CD-ROM controller 1 unit 1
647 2 = /dev/sbpcd6 Panasonic CD-ROM controller 1 unit 2
648 3 = /dev/sbpcd7 Panasonic CD-ROM controller 1 unit 3
651 0 = /dev/qft0 Unit 0, rewind-on-close
652 1 = /dev/qft1 Unit 1, rewind-on-close
653 2 = /dev/qft2 Unit 2, rewind-on-close
654 3 = /dev/qft3 Unit 3, rewind-on-close
655 4 = /dev/nqft0 Unit 0, no rewind-on-close
656 5 = /dev/nqft1 Unit 1, no rewind-on-close
657 6 = /dev/nqft2 Unit 2, no rewind-on-close
658 7 = /dev/nqft3 Unit 3, no rewind-on-close
659 16 = /dev/zqft0 Unit 0, rewind-on-close, compression
660 17 = /dev/zqft1 Unit 1, rewind-on-close, compression
661 18 = /dev/zqft2 Unit 2, rewind-on-close, compression
662 19 = /dev/zqft3 Unit 3, rewind-on-close, compression
663 20 = /dev/nzqft0 Unit 0, no rewind-on-close, compression
664 21 = /dev/nzqft1 Unit 1, no rewind-on-close, compression
665 22 = /dev/nzqft2 Unit 2, no rewind-on-close, compression
666 23 = /dev/nzqft3 Unit 3, no rewind-on-close, compression
667 32 = /dev/rawqft0 Unit 0, rewind-on-close, no file marks
668 33 = /dev/rawqft1 Unit 1, rewind-on-close, no file marks
669 34 = /dev/rawqft2 Unit 2, rewind-on-close, no file marks
670 35 = /dev/rawqft3 Unit 3, rewind-on-close, no file marks
671 36 = /dev/nrawqft0 Unit 0, no rewind-on-close, no file marks
672 37 = /dev/nrawqft1 Unit 1, no rewind-on-close, no file marks
673 38 = /dev/nrawqft2 Unit 2, no rewind-on-close, no file marks
674 39 = /dev/nrawqft3 Unit 3, no rewind-on-close, no file marks
675 27 block Third Matsushita (Panasonic/SoundBlaster) CD-ROM
676 0 = /dev/sbpcd8 Panasonic CD-ROM controller 2 unit 0
677 1 = /dev/sbpcd9 Panasonic CD-ROM controller 2 unit 1
678 2 = /dev/sbpcd10 Panasonic CD-ROM controller 2 unit 2
679 3 = /dev/sbpcd11 Panasonic CD-ROM controller 2 unit 3
681 28 char Stallion serial card - card programming
682 0 = /dev/staliomem0 First Stallion card I/O memory
683 1 = /dev/staliomem1 Second Stallion card I/O memory
684 2 = /dev/staliomem2 Third Stallion card I/O memory
685 3 = /dev/staliomem3 Fourth Stallion card I/O memory
686 28 char Atari SLM ACSI laser printer (68k/Atari)
687 0 = /dev/slm0 First SLM laser printer
688 1 = /dev/slm1 Second SLM laser printer
690 28 block Fourth Matsushita (Panasonic/SoundBlaster) CD-ROM
691 0 = /dev/sbpcd12 Panasonic CD-ROM controller 3 unit 0
692 1 = /dev/sbpcd13 Panasonic CD-ROM controller 3 unit 1
693 2 = /dev/sbpcd14 Panasonic CD-ROM controller 3 unit 2
694 3 = /dev/sbpcd15 Panasonic CD-ROM controller 3 unit 3
695 28 block ACSI disk (68k/Atari)
696 0 = /dev/ada First ACSI disk whole disk
697 16 = /dev/adb Second ACSI disk whole disk
698 32 = /dev/adc Third ACSI disk whole disk
700 240 = /dev/adp 16th ACSI disk whole disk
702 Partitions are handled in the same way as for IDE
703 disks (see major number 3) except that the limit on
704 partitions is 15, like SCSI.
706 29 char Universal frame buffer
707 0 = /dev/fb0 First frame buffer
708 1 = /dev/fb1 Second frame buffer
710 31 = /dev/fb31 32nd frame buffer
712 29 block Aztech/Orchid/Okano/Wearnes CD-ROM
713 0 = /dev/aztcd Aztech CD-ROM
715 30 char iBCS-2 compatibility devices
716 0 = /dev/socksys Socket access
717 1 = /dev/spx SVR3 local X interface
718 32 = /dev/inet/ip Network access
729 Additionally, iBCS-2 requires the following links:
731 /dev/ip -> /dev/inet/ip
732 /dev/icmp -> /dev/inet/icmp
733 /dev/ggp -> /dev/inet/ggp
734 /dev/ipip -> /dev/inet/ipip
735 /dev/tcp -> /dev/inet/tcp
736 /dev/egp -> /dev/inet/egp
737 /dev/pup -> /dev/inet/pup
738 /dev/udp -> /dev/inet/udp
739 /dev/idp -> /dev/inet/idp
740 /dev/rawip -> /dev/inet/rawip
741 /dev/inet/arp -> /dev/inet/udp
742 /dev/inet/rip -> /dev/inet/udp
743 /dev/nfsd -> /dev/socksys
744 /dev/X0R -> /dev/null (? apparently not required ?)
746 30 block Philips LMS CM-205 CD-ROM
747 0 = /dev/cm205cd Philips LMS CM-205 CD-ROM
749 /dev/lmscd is an older name for this device. This
750 driver does not work with the CM-205MS CD-ROM.
753 0 = /dev/mpu401data MPU-401 data port
754 1 = /dev/mpu401stat MPU-401 status port
755 31 block ROM/flash memory card
756 0 = /dev/rom0 First ROM card (rw)
758 7 = /dev/rom7 Eighth ROM card (rw)
759 8 = /dev/rrom0 First ROM card (ro)
761 15 = /dev/rrom7 Eighth ROM card (ro)
762 16 = /dev/flash0 First flash memory card (rw)
764 23 = /dev/flash7 Eighth flash memory card (rw)
765 24 = /dev/rflash0 First flash memory card (ro)
767 31 = /dev/rflash7 Eighth flash memory card (ro)
769 The read-write (rw) devices support back-caching
770 written data in RAM, as well as writing to flash RAM
771 devices. The read-only devices (ro) support reading
774 32 char Specialix serial card
775 0 = /dev/ttyX0 First Specialix port
776 1 = /dev/ttyX1 Second Specialix port
778 32 block Philips LMS CM-206 CD-ROM
779 0 = /dev/cm206cd Philips LMS CM-206 CD-ROM
781 33 char Specialix serial card - alternate devices
782 0 = /dev/cux0 Callout device for ttyX0
783 1 = /dev/cux1 Callout device for ttyX1
785 33 block Third IDE hard disk/CD-ROM interface
786 0 = /dev/hde Master: whole disk (or CD-ROM)
787 64 = /dev/hdf Slave: whole disk (or CD-ROM)
789 Partitions are handled the same way as for the first
790 interface (see major number 3).
792 34 char Z8530 HDLC driver
793 0 = /dev/scc0 First Z8530, first port
794 1 = /dev/scc1 First Z8530, second port
795 2 = /dev/scc2 Second Z8530, first port
796 3 = /dev/scc3 Second Z8530, second port
799 In a previous version these devices were named
800 /dev/sc1 for /dev/scc0, /dev/sc2 for /dev/scc1, and so
803 34 block Fourth IDE hard disk/CD-ROM interface
804 0 = /dev/hdg Master: whole disk (or CD-ROM)
805 64 = /dev/hdh Slave: whole disk (or CD-ROM)
807 Partitions are handled the same way as for the first
808 interface (see major number 3).
810 35 char tclmidi MIDI driver
811 0 = /dev/midi0 First MIDI port, kernel timed
812 1 = /dev/midi1 Second MIDI port, kernel timed
813 2 = /dev/midi2 Third MIDI port, kernel timed
814 3 = /dev/midi3 Fourth MIDI port, kernel timed
815 64 = /dev/rmidi0 First MIDI port, untimed
816 65 = /dev/rmidi1 Second MIDI port, untimed
817 66 = /dev/rmidi2 Third MIDI port, untimed
818 67 = /dev/rmidi3 Fourth MIDI port, untimed
819 128 = /dev/smpte0 First MIDI port, SMPTE timed
820 129 = /dev/smpte1 Second MIDI port, SMPTE timed
821 130 = /dev/smpte2 Third MIDI port, SMPTE timed
822 131 = /dev/smpte3 Fourth MIDI port, SMPTE timed
823 35 block Slow memory ramdisk
824 0 = /dev/slram Slow memory ramdisk
826 36 char Netlink support
827 0 = /dev/route Routing, device updates, kernel to user
828 1 = /dev/skip enSKIP security cache control
829 3 = /dev/fwmonitor Firewall packet copies
830 16 = /dev/tap0 First Ethertap device
832 31 = /dev/tap15 16th Ethertap device
833 36 block MCA ESDI hard disk
834 0 = /dev/eda First ESDI disk whole disk
835 64 = /dev/edb Second ESDI disk whole disk
838 Partitions are handled in the same way as IDE disks
839 (see major number 3).
842 0 = /dev/ht0 First IDE tape
843 1 = /dev/ht1 Second IDE tape
845 128 = /dev/nht0 First IDE tape, no rewind-on-close
846 129 = /dev/nht1 Second IDE tape, no rewind-on-close
849 Currently, only one IDE tape drive is supported.
851 37 block Zorro II ramdisk
852 0 = /dev/z2ram Zorro II ramdisk
854 38 char Myricom PCI Myrinet board
855 0 = /dev/mlanai0 First Myrinet board
856 1 = /dev/mlanai1 Second Myrinet board
859 This device is used for status query, board control
860 and "user level packet I/O." This board is also
861 accessible as a standard networking "eth" device.
863 38 block Reserved for Linux/AP+
865 39 char ML-16P experimental I/O board
866 0 = /dev/ml16pa-a0 First card, first analog channel
867 1 = /dev/ml16pa-a1 First card, second analog channel
869 15 = /dev/ml16pa-a15 First card, 16th analog channel
870 16 = /dev/ml16pa-d First card, digital lines
871 17 = /dev/ml16pa-c0 First card, first counter/timer
872 18 = /dev/ml16pa-c1 First card, second counter/timer
873 19 = /dev/ml16pa-c2 First card, third counter/timer
874 32 = /dev/ml16pb-a0 Second card, first analog channel
875 33 = /dev/ml16pb-a1 Second card, second analog channel
877 47 = /dev/ml16pb-a15 Second card, 16th analog channel
878 48 = /dev/ml16pb-d Second card, digital lines
879 49 = /dev/ml16pb-c0 Second card, first counter/timer
880 50 = /dev/ml16pb-c1 Second card, second counter/timer
881 51 = /dev/ml16pb-c2 Second card, third counter/timer
883 39 block Reserved for Linux/AP+
885 40 char Matrox Meteor frame grabber {2.6}
886 0 = /dev/mmetfgrab Matrox Meteor frame grabber
887 40 block Syquest EZ135 parallel port removable drive
888 0 = /dev/eza Parallel EZ135 drive, whole disk
890 This device is obsolete and will be removed in a
891 future version of Linux. It has been replaced with
892 the parallel port IDE disk driver at major number 45.
893 Partitions are handled in the same way as IDE disks
894 (see major number 3).
896 41 char Yet Another Micro Monitor
897 0 = /dev/yamm Yet Another Micro Monitor
898 41 block MicroSolutions BackPack parallel port CD-ROM
899 0 = /dev/bpcd BackPack CD-ROM
901 This device is obsolete and will be removed in a
902 future version of Linux. It has been replaced with
903 the parallel port ATAPI CD-ROM driver at major number 46.
905 42 char Demo/sample use
906 42 block Demo/sample use
908 This number is intended for use in sample code, as
909 well as a general "example" device number. It
910 should never be used for a device driver that is being
911 distributed; either obtain an official number or use
912 the local/experimental range. The sudden addition or
913 removal of a driver with this number should not cause
914 ill effects to the system (bugs excepted.)
916 IN PARTICULAR, ANY DISTRIBUTION WHICH CONTAINS A
917 DEVICE DRIVER USING MAJOR NUMBER 42 IS NONCOMPLIANT.
919 43 char isdn4linux virtual modem
920 0 = /dev/ttyI0 First virtual modem
922 63 = /dev/ttyI63 64th virtual modem
923 43 block Network block devices
924 0 = /dev/nb0 First network block device
925 1 = /dev/nb1 Second network block device
928 Network Block Device is somehow similar to loopback
929 devices: If you read from it, it sends packet across
930 network asking server for data. If you write to it, it
931 sends packet telling server to write. It could be used
932 to mounting filesystems over the net, swapping over
933 the net, implementing block device in userland etc.
935 44 char isdn4linux virtual modem - alternate devices
936 0 = /dev/cui0 Callout device for ttyI0
938 63 = /dev/cui63 Callout device for ttyI63
939 44 block Flash Translation Layer (FTL) filesystems
940 0 = /dev/ftla FTL on first Memory Technology Device
941 16 = /dev/ftlb FTL on second Memory Technology Device
942 32 = /dev/ftlc FTL on third Memory Technology Device
944 240 = /dev/ftlp FTL on 16th Memory Technology Device
946 Partitions are handled in the same way as for IDE
947 disks (see major number 3) expect that the partition
948 limit is 15 rather than 63 per disk (same as SCSI.)
950 45 char isdn4linux ISDN BRI driver
951 0 = /dev/isdn0 First virtual B channel raw data
953 63 = /dev/isdn63 64th virtual B channel raw data
954 64 = /dev/isdnctrl0 First channel control/debug
956 127 = /dev/isdnctrl63 64th channel control/debug
958 128 = /dev/ippp0 First SyncPPP device
960 191 = /dev/ippp63 64th SyncPPP device
962 255 = /dev/isdninfo ISDN monitor interface
963 45 block Parallel port IDE disk devices
964 0 = /dev/pda First parallel port IDE disk
965 16 = /dev/pdb Second parallel port IDE disk
966 32 = /dev/pdc Third parallel port IDE disk
967 48 = /dev/pdd Fourth parallel port IDE disk
969 Partitions are handled in the same way as for IDE
970 disks (see major number 3) except that the partition
971 limit is 15 rather than 63 per disk.
973 46 char Comtrol Rocketport serial card
974 0 = /dev/ttyR0 First Rocketport port
975 1 = /dev/ttyR1 Second Rocketport port
977 46 block Parallel port ATAPI CD-ROM devices
978 0 = /dev/pcd0 First parallel port ATAPI CD-ROM
979 1 = /dev/pcd1 Second parallel port ATAPI CD-ROM
980 2 = /dev/pcd2 Third parallel port ATAPI CD-ROM
981 3 = /dev/pcd3 Fourth parallel port ATAPI CD-ROM
983 47 char Comtrol Rocketport serial card - alternate devices
984 0 = /dev/cur0 Callout device for ttyR0
985 1 = /dev/cur1 Callout device for ttyR1
987 47 block Parallel port ATAPI disk devices
988 0 = /dev/pf0 First parallel port ATAPI disk
989 1 = /dev/pf1 Second parallel port ATAPI disk
990 2 = /dev/pf2 Third parallel port ATAPI disk
991 3 = /dev/pf3 Fourth parallel port ATAPI disk
993 This driver is intended for floppy disks and similar
994 devices and hence does not support partitioning.
996 48 char SDL RISCom serial card
997 0 = /dev/ttyL0 First RISCom port
998 1 = /dev/ttyL1 Second RISCom port
1000 48 block Mylex DAC960 PCI RAID controller; first controller
1001 0 = /dev/rd/c0d0 First disk, whole disk
1002 8 = /dev/rd/c0d1 Second disk, whole disk
1004 248 = /dev/rd/c0d31 32nd disk, whole disk
1007 0 = /dev/rd/c?d? Whole disk
1008 1 = /dev/rd/c?d?p1 First partition
1010 7 = /dev/rd/c?d?p7 Seventh partition
1012 49 char SDL RISCom serial card - alternate devices
1013 0 = /dev/cul0 Callout device for ttyL0
1014 1 = /dev/cul1 Callout device for ttyL1
1016 49 block Mylex DAC960 PCI RAID controller; second controller
1017 0 = /dev/rd/c1d0 First disk, whole disk
1018 8 = /dev/rd/c1d1 Second disk, whole disk
1020 248 = /dev/rd/c1d31 32nd disk, whole disk
1022 Partitions are handled as for major 48.
1024 50 char Reserved for GLINT
1026 50 block Mylex DAC960 PCI RAID controller; third controller
1027 0 = /dev/rd/c2d0 First disk, whole disk
1028 8 = /dev/rd/c2d1 Second disk, whole disk
1030 248 = /dev/rd/c2d31 32nd disk, whole disk
1032 51 char Baycom radio modem OR Radio Tech BIM-XXX-RS232 radio modem
1033 0 = /dev/bc0 First Baycom radio modem
1034 1 = /dev/bc1 Second Baycom radio modem
1036 51 block Mylex DAC960 PCI RAID controller; fourth controller
1037 0 = /dev/rd/c3d0 First disk, whole disk
1038 8 = /dev/rd/c3d1 Second disk, whole disk
1040 248 = /dev/rd/c3d31 32nd disk, whole disk
1042 Partitions are handled as for major 48.
1044 52 char Spellcaster DataComm/BRI ISDN card
1045 0 = /dev/dcbri0 First DataComm card
1046 1 = /dev/dcbri1 Second DataComm card
1047 2 = /dev/dcbri2 Third DataComm card
1048 3 = /dev/dcbri3 Fourth DataComm card
1049 52 block Mylex DAC960 PCI RAID controller; fifth controller
1050 0 = /dev/rd/c4d0 First disk, whole disk
1051 8 = /dev/rd/c4d1 Second disk, whole disk
1053 248 = /dev/rd/c4d31 32nd disk, whole disk
1055 Partitions are handled as for major 48.
1057 53 char BDM interface for remote debugging MC683xx microcontrollers
1058 0 = /dev/pd_bdm0 PD BDM interface on lp0
1059 1 = /dev/pd_bdm1 PD BDM interface on lp1
1060 2 = /dev/pd_bdm2 PD BDM interface on lp2
1061 4 = /dev/icd_bdm0 ICD BDM interface on lp0
1062 5 = /dev/icd_bdm1 ICD BDM interface on lp1
1063 6 = /dev/icd_bdm2 ICD BDM interface on lp2
1065 This device is used for the interfacing to the MC683xx
1066 microcontrollers via Background Debug Mode by use of a
1067 Parallel Port interface. PD is the Motorola Public
1068 Domain Interface and ICD is the commercial interface
1071 53 block Mylex DAC960 PCI RAID controller; sixth controller
1072 0 = /dev/rd/c5d0 First disk, whole disk
1073 8 = /dev/rd/c5d1 Second disk, whole disk
1075 248 = /dev/rd/c5d31 32nd disk, whole disk
1077 Partitions are handled as for major 48.
1079 54 char Electrocardiognosis Holter serial card
1080 0 = /dev/holter0 First Holter port
1081 1 = /dev/holter1 Second Holter port
1082 2 = /dev/holter2 Third Holter port
1084 A custom serial card used by Electrocardiognosis SRL
1085 <mseritan@ottonel.pub.ro> to transfer data from Holter
1086 24-hour heart monitoring equipment.
1088 54 block Mylex DAC960 PCI RAID controller; seventh controller
1089 0 = /dev/rd/c6d0 First disk, whole disk
1090 8 = /dev/rd/c6d1 Second disk, whole disk
1092 248 = /dev/rd/c6d31 32nd disk, whole disk
1094 Partitions are handled as for major 48.
1096 55 char DSP56001 digital signal processor
1097 0 = /dev/dsp56k First DSP56001
1098 55 block Mylex DAC960 PCI RAID controller; eigth controller
1099 0 = /dev/rd/c7d0 First disk, whole disk
1100 8 = /dev/rd/c7d1 Second disk, whole disk
1102 248 = /dev/rd/c7d31 32nd disk, whole disk
1104 Partitions are handled as for major 48.
1106 56 char Apple Desktop Bus
1107 0 = /dev/adb ADB bus control
1109 Additional devices will be added to this number, all
1110 starting with /dev/adb.
1112 56 block Fifth IDE hard disk/CD-ROM interface
1113 0 = /dev/hdi Master: whole disk (or CD-ROM)
1114 64 = /dev/hdj Slave: whole disk (or CD-ROM)
1116 Partitions are handled the same way as for the first
1117 interface (see major number 3).
1119 57 char Hayes ESP serial card
1120 0 = /dev/ttyP0 First ESP port
1121 1 = /dev/ttyP1 Second ESP port
1124 57 block Sixth IDE hard disk/CD-ROM interface
1125 0 = /dev/hdk Master: whole disk (or CD-ROM)
1126 64 = /dev/hdl Slave: whole disk (or CD-ROM)
1128 Partitions are handled the same way as for the first
1129 interface (see major number 3).
1131 58 char Hayes ESP serial card - alternate devices
1132 0 = /dev/cup0 Callout device for ttyP0
1133 1 = /dev/cup1 Callout device for ttyP1
1135 58 block Reserved for logical volume manager
1137 59 char sf firewall package
1138 0 = /dev/firewall Communication with sf kernel module
1140 59 block Generic PDA filesystem device
1141 0 = /dev/pda0 First PDA device
1142 1 = /dev/pda1 Second PDA device
1145 The pda devices are used to mount filesystems on
1146 remote pda's (basically slow handheld machines with
1147 proprietary OS's and limited memory and storage
1148 running small fs translation drivers) through serial /
1149 IRDA / parallel links.
1151 NAMING CONFLICT -- PROPOSED REVISED NAME /dev/rpda0 etc
1153 60-63 char LOCAL/EXPERIMENTAL USE
1154 60-63 block LOCAL/EXPERIMENTAL USE
1155 Allocated for local/experimental use. For devices not
1156 assigned official numbers, these ranges should be
1157 used in order to avoid conflicting with future assignments.
1159 64 char ENskip kernel encryption package
1160 0 = /dev/enskip Communication with ENskip kernel module
1162 64 block Scramdisk/DriveCrypt encrypted devices
1163 0 = /dev/scramdisk/master Master node for ioctls
1164 1 = /dev/scramdisk/1 First encrypted device
1165 2 = /dev/scramdisk/2 Second encrypted device
1167 255 = /dev/scramdisk/255 255th encrypted device
1169 The filename of the encrypted container and the passwords
1170 are sent via ioctls (using the sdmount tool) to the master
1171 node which then activates them via one of the
1172 /dev/scramdisk/x nodes for loopback mounting (all handled
1173 through the sdmount tool).
1175 Requested by: andy@scramdisklinux.org
1177 65 char Sundance "plink" Transputer boards
1178 0 = /dev/plink0 First plink device
1179 1 = /dev/plink1 Second plink device
1180 2 = /dev/plink2 Third plink device
1181 3 = /dev/plink3 Fourth plink device
1182 64 = /dev/rplink0 First plink device, raw
1183 65 = /dev/rplink1 Second plink device, raw
1184 66 = /dev/rplink2 Third plink device, raw
1185 67 = /dev/rplink3 Fourth plink device, raw
1186 128 = /dev/plink0d First plink device, debug
1187 129 = /dev/plink1d Second plink device, debug
1188 130 = /dev/plink2d Third plink device, debug
1189 131 = /dev/plink3d Fourth plink device, debug
1190 192 = /dev/rplink0d First plink device, raw, debug
1191 193 = /dev/rplink1d Second plink device, raw, debug
1192 194 = /dev/rplink2d Third plink device, raw, debug
1193 195 = /dev/rplink3d Fourth plink device, raw, debug
1195 This is a commercial driver; contact James Howes
1196 <jth@prosig.demon.co.uk> for information.
1198 65 block SCSI disk devices (16-31)
1199 0 = /dev/sdq 17th SCSI disk whole disk
1200 16 = /dev/sdr 18th SCSI disk whole disk
1201 32 = /dev/sds 19th SCSI disk whole disk
1203 240 = /dev/sdaf 32nd SCSI disk whole disk
1205 Partitions are handled in the same way as for IDE
1206 disks (see major number 3) except that the limit on
1209 66 char YARC PowerPC PCI coprocessor card
1210 0 = /dev/yppcpci0 First YARC card
1211 1 = /dev/yppcpci1 Second YARC card
1214 66 block SCSI disk devices (32-47)
1215 0 = /dev/sdag 33th SCSI disk whole disk
1216 16 = /dev/sdah 34th SCSI disk whole disk
1217 32 = /dev/sdai 35th SCSI disk whole disk
1219 240 = /dev/sdav 48nd SCSI disk whole disk
1221 Partitions are handled in the same way as for IDE
1222 disks (see major number 3) except that the limit on
1225 67 char Coda network file system
1226 0 = /dev/cfs0 Coda cache manager
1228 See http://www.coda.cs.cmu.edu for information about Coda.
1230 67 block SCSI disk devices (48-63)
1231 0 = /dev/sdaw 49th SCSI disk whole disk
1232 16 = /dev/sdax 50th SCSI disk whole disk
1233 32 = /dev/sday 51st SCSI disk whole disk
1235 240 = /dev/sdbl 64th SCSI disk whole disk
1237 Partitions are handled in the same way as for IDE
1238 disks (see major number 3) except that the limit on
1241 68 char CAPI 2.0 interface
1242 0 = /dev/capi20 Control device
1243 1 = /dev/capi20.00 First CAPI 2.0 application
1244 2 = /dev/capi20.01 Second CAPI 2.0 application
1246 20 = /dev/capi20.19 19th CAPI 2.0 application
1248 ISDN CAPI 2.0 driver for use with CAPI 2.0
1249 applications; currently supports the AVM B1 card.
1251 68 block SCSI disk devices (64-79)
1252 0 = /dev/sdbm 65th SCSI disk whole disk
1253 16 = /dev/sdbn 66th SCSI disk whole disk
1254 32 = /dev/sdbo 67th SCSI disk whole disk
1256 240 = /dev/sdcb 80th SCSI disk whole disk
1258 Partitions are handled in the same way as for IDE
1259 disks (see major number 3) except that the limit on
1262 69 char MA16 numeric accelerator card
1263 0 = /dev/ma16 Board memory access
1265 69 block SCSI disk devices (80-95)
1266 0 = /dev/sdcc 81st SCSI disk whole disk
1267 16 = /dev/sdcd 82nd SCSI disk whole disk
1268 32 = /dev/sdce 83th SCSI disk whole disk
1270 240 = /dev/sdcr 96th SCSI disk whole disk
1272 Partitions are handled in the same way as for IDE
1273 disks (see major number 3) except that the limit on
1276 70 char SpellCaster Protocol Services Interface
1277 0 = /dev/apscfg Configuration interface
1278 1 = /dev/apsauth Authentication interface
1279 2 = /dev/apslog Logging interface
1280 3 = /dev/apsdbg Debugging interface
1281 64 = /dev/apsisdn ISDN command interface
1282 65 = /dev/apsasync Async command interface
1283 128 = /dev/apsmon Monitor interface
1285 70 block SCSI disk devices (96-111)
1286 0 = /dev/sdcs 97th SCSI disk whole disk
1287 16 = /dev/sdct 98th SCSI disk whole disk
1288 32 = /dev/sdcu 99th SCSI disk whole disk
1290 240 = /dev/sddh 112nd SCSI disk whole disk
1292 Partitions are handled in the same way as for IDE
1293 disks (see major number 3) except that the limit on
1296 71 char Computone IntelliPort II serial card
1297 0 = /dev/ttyF0 IntelliPort II board 0, port 0
1298 1 = /dev/ttyF1 IntelliPort II board 0, port 1
1300 63 = /dev/ttyF63 IntelliPort II board 0, port 63
1301 64 = /dev/ttyF64 IntelliPort II board 1, port 0
1302 65 = /dev/ttyF65 IntelliPort II board 1, port 1
1304 127 = /dev/ttyF127 IntelliPort II board 1, port 63
1305 128 = /dev/ttyF128 IntelliPort II board 2, port 0
1306 129 = /dev/ttyF129 IntelliPort II board 2, port 1
1308 191 = /dev/ttyF191 IntelliPort II board 2, port 63
1309 192 = /dev/ttyF192 IntelliPort II board 3, port 0
1310 193 = /dev/ttyF193 IntelliPort II board 3, port 1
1312 255 = /dev/ttyF255 IntelliPort II board 3, port 63
1314 71 block SCSI disk devices (112-127)
1315 0 = /dev/sddi 113th SCSI disk whole disk
1316 16 = /dev/sddj 114th SCSI disk whole disk
1317 32 = /dev/sddk 115th SCSI disk whole disk
1319 240 = /dev/sddx 128th SCSI disk whole disk
1321 Partitions are handled in the same way as for IDE
1322 disks (see major number 3) except that the limit on
1325 72 char Computone IntelliPort II serial card - alternate devices
1326 0 = /dev/cuf0 Callout device for ttyF0
1327 1 = /dev/cuf1 Callout device for ttyF1
1329 63 = /dev/cuf63 Callout device for ttyF63
1330 64 = /dev/cuf64 Callout device for ttyF64
1331 65 = /dev/cuf65 Callout device for ttyF65
1333 127 = /dev/cuf127 Callout device for ttyF127
1334 128 = /dev/cuf128 Callout device for ttyF128
1335 129 = /dev/cuf129 Callout device for ttyF129
1337 191 = /dev/cuf191 Callout device for ttyF191
1338 192 = /dev/cuf192 Callout device for ttyF192
1339 193 = /dev/cuf193 Callout device for ttyF193
1341 255 = /dev/cuf255 Callout device for ttyF255
1343 72 block Compaq Intelligent Drive Array, first controller
1344 0 = /dev/ida/c0d0 First logical drive whole disk
1345 16 = /dev/ida/c0d1 Second logical drive whole disk
1347 240 = /dev/ida/c0d15 16th logical drive whole disk
1349 Partitions are handled the same way as for Mylex
1350 DAC960 (see major number 48) except that the limit on
1353 73 char Computone IntelliPort II serial card - control devices
1354 0 = /dev/ip2ipl0 Loadware device for board 0
1355 1 = /dev/ip2stat0 Status device for board 0
1356 4 = /dev/ip2ipl1 Loadware device for board 1
1357 5 = /dev/ip2stat1 Status device for board 1
1358 8 = /dev/ip2ipl2 Loadware device for board 2
1359 9 = /dev/ip2stat2 Status device for board 2
1360 12 = /dev/ip2ipl3 Loadware device for board 3
1361 13 = /dev/ip2stat3 Status device for board 3
1363 73 block Compaq Intelligent Drive Array, second controller
1364 0 = /dev/ida/c1d0 First logical drive whole disk
1365 16 = /dev/ida/c1d1 Second logical drive whole disk
1367 240 = /dev/ida/c1d15 16th logical drive whole disk
1369 Partitions are handled the same way as for Mylex
1370 DAC960 (see major number 48) except that the limit on
1374 0 = /dev/SCI/0 SCI device 0
1375 1 = /dev/SCI/1 SCI device 1
1378 Currently for Dolphin Interconnect Solutions' PCI-SCI
1381 74 block Compaq Intelligent Drive Array, third controller
1382 0 = /dev/ida/c2d0 First logical drive whole disk
1383 16 = /dev/ida/c2d1 Second logical drive whole disk
1385 240 = /dev/ida/c2d15 16th logical drive whole disk
1387 Partitions are handled the same way as for Mylex
1388 DAC960 (see major number 48) except that the limit on
1391 75 char Specialix IO8+ serial card
1392 0 = /dev/ttyW0 First IO8+ port, first card
1393 1 = /dev/ttyW1 Second IO8+ port, first card
1395 8 = /dev/ttyW8 First IO8+ port, second card
1398 75 block Compaq Intelligent Drive Array, fourth controller
1399 0 = /dev/ida/c3d0 First logical drive whole disk
1400 16 = /dev/ida/c3d1 Second logical drive whole disk
1402 240 = /dev/ida/c3d15 16th logical drive whole disk
1404 Partitions are handled the same way as for Mylex
1405 DAC960 (see major number 48) except that the limit on
1408 76 char Specialix IO8+ serial card - alternate devices
1409 0 = /dev/cuw0 Callout device for ttyW0
1410 1 = /dev/cuw1 Callout device for ttyW1
1412 8 = /dev/cuw8 Callout device for ttyW8
1415 76 block Compaq Intelligent Drive Array, fifth controller
1416 0 = /dev/ida/c4d0 First logical drive whole disk
1417 16 = /dev/ida/c4d1 Second logical drive whole disk
1419 240 = /dev/ida/c4d15 16th logical drive whole disk
1421 Partitions are handled the same way as for Mylex
1422 DAC960 (see major number 48) except that the limit on
1426 77 char ComScire Quantum Noise Generator
1427 0 = /dev/qng ComScire Quantum Noise Generator
1429 77 block Compaq Intelligent Drive Array, sixth controller
1430 0 = /dev/ida/c5d0 First logical drive whole disk
1431 16 = /dev/ida/c5d1 Second logical drive whole disk
1433 240 = /dev/ida/c5d15 16th logical drive whole disk
1435 Partitions are handled the same way as for Mylex
1436 DAC960 (see major number 48) except that the limit on
1440 78 char PAM Software's multimodem boards
1441 0 = /dev/ttyM0 First PAM modem
1442 1 = /dev/ttyM1 Second PAM modem
1445 78 block Compaq Intelligent Drive Array, seventh controller
1446 0 = /dev/ida/c6d0 First logical drive whole disk
1447 16 = /dev/ida/c6d1 Second logical drive whole disk
1449 240 = /dev/ida/c6d15 16th logical drive whole disk
1451 Partitions are handled the same way as for Mylex
1452 DAC960 (see major number 48) except that the limit on
1456 79 char PAM Software's multimodem boards - alternate devices
1457 0 = /dev/cum0 Callout device for ttyM0
1458 1 = /dev/cum1 Callout device for ttyM1
1461 79 block Compaq Intelligent Drive Array, eigth controller
1462 0 = /dev/ida/c7d0 First logical drive whole disk
1463 16 = /dev/ida/c7d1 Second logical drive whole disk
1465 240 = /dev/ida/c715 16th logical drive whole disk
1467 Partitions are handled the same way as for Mylex
1468 DAC960 (see major number 48) except that the limit on
1472 80 char Photometrics AT200 CCD camera
1473 0 = /dev/at200 Photometrics AT200 CCD camera
1475 80 block I2O hard disk
1476 0 = /dev/i2o/hda First I2O hard disk, whole disk
1477 16 = /dev/i2o/hdb Second I2O hard disk, whole disk
1479 240 = /dev/i2o/hdp 16th I2O hard disk, whole disk
1481 Partitions are handled in the same way as for IDE
1482 disks (see major number 3) except that the limit on
1486 0 = /dev/video0 Video capture/overlay device
1488 63 = /dev/video63 Video capture/overlay device
1489 64 = /dev/radio0 Radio device
1491 127 = /dev/radio63 Radio device
1492 192 = /dev/vtx0 Teletext device
1494 223 = /dev/vtx31 Teletext device
1495 224 = /dev/vbi0 Vertical blank interrupt
1497 255 = /dev/vbi31 Vertical blank interrupt
1499 81 block I2O hard disk
1500 0 = /dev/i2o/hdq 17th I2O hard disk, whole disk
1501 16 = /dev/i2o/hdr 18th I2O hard disk, whole disk
1503 240 = /dev/i2o/hdaf 32nd I2O hard disk, whole disk
1505 Partitions are handled in the same way as for IDE
1506 disks (see major number 3) except that the limit on
1509 82 char WiNRADiO communications receiver card
1510 0 = /dev/winradio0 First WiNRADiO card
1511 1 = /dev/winradio1 Second WiNRADiO card
1514 The driver and documentation may be obtained from
1515 http://www.proximity.com.au/~brian/winradio/
1517 82 block I2O hard disk
1518 0 = /dev/i2o/hdag 33rd I2O hard disk, whole disk
1519 16 = /dev/i2o/hdah 34th I2O hard disk, whole disk
1521 240 = /dev/i2o/hdav 48th I2O hard disk, whole disk
1523 Partitions are handled in the same way as for IDE
1524 disks (see major number 3) except that the limit on
1527 83 char Teletext/videotext interfaces {2.6}
1528 0 = /dev/vtx Teletext decoder
1529 16 = /dev/vttuner TV tuner on teletext interface
1531 Devices for the driver contained in the VideoteXt package.
1532 More information on http://home.pages.de/~videotext/
1534 83 block I2O hard disk
1535 0 = /dev/i2o/hdaw 49th I2O hard disk, whole disk
1536 16 = /dev/i2o/hdax 50th I2O hard disk, whole disk
1538 240 = /dev/i2o/hdbl 64th I2O hard disk, whole disk
1540 Partitions are handled in the same way as for IDE
1541 disks (see major number 3) except that the limit on
1544 84 char Ikon 1011[57] Versatec Greensheet Interface
1545 0 = /dev/ihcp0 First Greensheet port
1546 1 = /dev/ihcp1 Second Greensheet port
1548 84 block I2O hard disk
1549 0 = /dev/i2o/hdbm 65th I2O hard disk, whole disk
1550 16 = /dev/i2o/hdbn 66th I2O hard disk, whole disk
1552 240 = /dev/i2o/hdcb 80th I2O hard disk, whole disk
1554 Partitions are handled in the same way as for IDE
1555 disks (see major number 3) except that the limit on
1558 85 char Linux/SGI shared memory input queue
1559 0 = /dev/shmiq Master shared input queue
1560 1 = /dev/qcntl0 First device pushed
1561 2 = /dev/qcntl1 Second device pushed
1564 85 block I2O hard disk
1565 0 = /dev/i2o/hdcc 81st I2O hard disk, whole disk
1566 16 = /dev/i2o/hdcd 82nd I2O hard disk, whole disk
1568 240 = /dev/i2o/hdcr 96th I2O hard disk, whole disk
1570 Partitions are handled in the same way as for IDE
1571 disks (see major number 3) except that the limit on
1574 86 char SCSI media changer
1575 0 = /dev/sch0 First SCSI media changer
1576 1 = /dev/sch1 Second SCSI media changer
1579 86 block I2O hard disk
1580 0 = /dev/i2o/hdcs 97th I2O hard disk, whole disk
1581 16 = /dev/i2o/hdct 98th I2O hard disk, whole disk
1583 240 = /dev/i2o/hddh 112th I2O hard disk, whole disk
1585 Partitions are handled in the same way as for IDE
1586 disks (see major number 3) except that the limit on
1589 87 char Sony Control-A1 stereo control bus
1590 0 = /dev/controla0 First device on chain
1591 1 = /dev/controla1 Second device on chain
1594 87 block I2O hard disk
1595 0 = /dev/i2o/hddi 113rd I2O hard disk, whole disk
1596 16 = /dev/i2o/hddj 114th I2O hard disk, whole disk
1598 240 = /dev/i2o/hddx 128th I2O hard disk, whole disk
1600 Partitions are handled in the same way as for IDE
1601 disks (see major number 3) except that the limit on
1604 88 char COMX synchronous serial card
1605 0 = /dev/comx0 COMX channel 0
1606 1 = /dev/comx1 COMX channel 1
1609 88 block Seventh IDE hard disk/CD-ROM interface
1610 0 = /dev/hdm Master: whole disk (or CD-ROM)
1611 64 = /dev/hdn Slave: whole disk (or CD-ROM)
1613 Partitions are handled the same way as for the first
1614 interface (see major number 3).
1616 89 char I2C bus interface
1617 0 = /dev/i2c-0 First I2C adapter
1618 1 = /dev/i2c-1 Second I2C adapter
1621 89 block Eighth IDE hard disk/CD-ROM interface
1622 0 = /dev/hdo Master: whole disk (or CD-ROM)
1623 64 = /dev/hdp Slave: whole disk (or CD-ROM)
1625 Partitions are handled the same way as for the first
1626 interface (see major number 3).
1628 90 char Memory Technology Device (RAM, ROM, Flash)
1629 0 = /dev/mtd0 First MTD (rw)
1630 1 = /dev/mtdr0 First MTD (ro)
1632 30 = /dev/mtd15 16th MTD (rw)
1633 31 = /dev/mtdr15 16th MTD (ro)
1635 90 block Ninth IDE hard disk/CD-ROM interface
1636 0 = /dev/hdq Master: whole disk (or CD-ROM)
1637 64 = /dev/hdr Slave: whole disk (or CD-ROM)
1639 Partitions are handled the same way as for the first
1640 interface (see major number 3).
1642 91 char CAN-Bus devices
1643 0 = /dev/can0 First CAN-Bus controller
1644 1 = /dev/can1 Second CAN-Bus controller
1647 91 block Tenth IDE hard disk/CD-ROM interface
1648 0 = /dev/hds Master: whole disk (or CD-ROM)
1649 64 = /dev/hdt Slave: whole disk (or CD-ROM)
1651 Partitions are handled the same way as for the first
1652 interface (see major number 3).
1654 92 char Reserved for ith Kommunikationstechnik MIC ISDN card
1656 92 block PPDD encrypted disk driver
1657 0 = /dev/ppdd0 First encrypted disk
1658 1 = /dev/ppdd1 Second encrypted disk
1661 Partitions are handled in the same way as for IDE
1662 disks (see major number 3) except that the limit on
1665 93 char IBM Smart Capture Card frame grabber {2.6}
1666 0 = /dev/iscc0 First Smart Capture Card
1667 1 = /dev/iscc1 Second Smart Capture Card
1669 128 = /dev/isccctl0 First Smart Capture Card control
1670 129 = /dev/isccctl1 Second Smart Capture Card control
1673 93 block NAND Flash Translation Layer filesystem
1674 0 = /dev/nftla First NFTL layer
1675 16 = /dev/nftlb Second NFTL layer
1677 240 = /dev/nftlp 16th NTFL layer
1679 94 char miroVIDEO DC10/30 capture/playback device {2.6}
1680 0 = /dev/dcxx0 First capture card
1681 1 = /dev/dcxx1 Second capture card
1684 94 block Inverse NAND Flash Translation Layer
1685 0 = /dev/inftla First INFTL layer
1686 16 = /dev/inftlb Second INFTL layer
1688 240 = /dev/inftlp 16th INTFL layer
1691 0 = /dev/ipl Filter control device/log file
1692 1 = /dev/ipnat NAT control device/log file
1693 2 = /dev/ipstate State information log file
1694 3 = /dev/ipauth Authentication control device/log file
1697 95 block IBM S/390 DASD block storage
1698 0 = /dev/dasd0 First DASD device, major
1699 1 = /dev/dasd0a First DASD device, block 1
1700 2 = /dev/dasd0b First DASD device, block 2
1701 3 = /dev/dasd0c First DASD device, block 3
1702 4 = /dev/dasd1 Second DASD device, major
1703 5 = /dev/dasd1a Second DASD device, block 1
1704 6 = /dev/dasd1b Second DASD device, block 2
1705 7 = /dev/dasd1c Second DASD device, block 3
1708 96 char Parallel port ATAPI tape devices
1709 0 = /dev/pt0 First parallel port ATAPI tape
1710 1 = /dev/pt1 Second parallel port ATAPI tape
1712 128 = /dev/npt0 First p.p. ATAPI tape, no rewind
1713 129 = /dev/npt1 Second p.p. ATAPI tape, no rewind
1716 96 block IBM S/390 VM/ESA minidisk
1717 0 = /dev/msd0 First VM/ESA minidisk
1718 1 = /dev/msd1 Second VM/ESA minidisk
1721 97 char Parallel port generic ATAPI interface
1722 0 = /dev/pg0 First parallel port ATAPI device
1723 1 = /dev/pg1 Second parallel port ATAPI device
1724 2 = /dev/pg2 Third parallel port ATAPI device
1725 3 = /dev/pg3 Fourth parallel port ATAPI device
1727 These devices support the same API as the generic SCSI
1730 97 block Packet writing for CD/DVD devices
1731 0 = /dev/pktcdvd0 First packet-writing module
1732 1 = /dev/pktcdvd1 Second packet-writing module
1735 98 char Control and Measurement Device (comedi)
1736 0 = /dev/comedi0 First comedi device
1737 1 = /dev/comedi1 Second comedi device
1740 See http://stm.lbl.gov/comedi or http://www.llp.fu-berlin.de/.
1742 98 block User-mode virtual block device
1743 0 = /dev/ubd0 First user-mode block device
1744 1 = /dev/ubd1 Second user-mode block device
1747 This device is used by the user-mode virtual kernel port.
1749 99 char Raw parallel ports
1750 0 = /dev/parport0 First parallel port
1751 1 = /dev/parport1 Second parallel port
1754 99 block JavaStation flash disk
1755 0 = /dev/jsfd JavaStation flash disk
1757 100 char Telephony for Linux
1758 0 = /dev/phone0 First telephony device
1759 1 = /dev/phone1 Second telephony device
1762 101 char Motorola DSP 56xxx board
1763 0 = /dev/mdspstat Status information
1764 1 = /dev/mdsp1 First DSP board I/O controls
1766 16 = /dev/mdsp16 16th DSP board I/O controls
1768 101 block AMI HyperDisk RAID controller
1769 0 = /dev/amiraid/ar0 First array whole disk
1770 16 = /dev/amiraid/ar1 Second array whole disk
1772 240 = /dev/amiraid/ar15 16th array whole disk
1774 For each device, partitions are added as:
1775 0 = /dev/amiraid/ar? Whole disk
1776 1 = /dev/amiraid/ar?p1 First partition
1777 2 = /dev/amiraid/ar?p2 Second partition
1779 15 = /dev/amiraid/ar?p15 15th partition
1781 102 char Philips SAA5249 Teletext signal decoder {2.6}
1782 0 = /dev/tlk0 First Teletext decoder
1783 1 = /dev/tlk1 Second Teletext decoder
1784 2 = /dev/tlk2 Third Teletext decoder
1785 3 = /dev/tlk3 Fourth Teletext decoder
1787 102 block Compressed block device
1788 0 = /dev/cbd/a First compressed block device, whole device
1789 16 = /dev/cbd/b Second compressed block device, whole device
1791 240 = /dev/cbd/p 16th compressed block device, whole device
1793 Partitions are handled in the same way as for IDE
1794 disks (see major number 3) except that the limit on
1797 103 char Arla network file system
1798 0 = /dev/xfs0 Arla XFS
1800 Arla is a free clone of the Andrew File System, AFS.
1801 Any resemblance with the Swedish milk producer is
1802 coincidental. For more information about the project,
1803 write to <arla-drinkers@stacken.kth.se> or subscribe
1804 to the arla announce mailing list by sending a mail to
1805 <arla-announce-request@stacken.kth.se>.
1807 103 block Audit device
1808 0 = /dev/audit Audit device
1810 104 char Flash BIOS support
1812 104 block Compaq Next Generation Drive Array, first controller
1813 0 = /dev/cciss/c0d0 First logical drive, whole disk
1814 16 = /dev/cciss/c0d1 Second logical drive, whole disk
1816 240 = /dev/cciss/c0d15 16th logical drive, whole disk
1818 Partitions are handled the same way as for Mylex
1819 DAC960 (see major number 48) except that the limit on
1822 105 char Comtrol VS-1000 serial controller
1823 0 = /dev/ttyV0 First VS-1000 port
1824 1 = /dev/ttyV1 Second VS-1000 port
1827 105 block Compaq Next Generation Drive Array, second controller
1828 0 = /dev/cciss/c1d0 First logical drive, whole disk
1829 16 = /dev/cciss/c1d1 Second logical drive, whole disk
1831 240 = /dev/cciss/c1d15 16th logical drive, whole disk
1833 Partitions are handled the same way as for Mylex
1834 DAC960 (see major number 48) except that the limit on
1837 106 char Comtrol VS-1000 serial controller - alternate devices
1838 0 = /dev/cuv0 First VS-1000 port
1839 1 = /dev/cuv1 Second VS-1000 port
1842 106 block Compaq Next Generation Drive Array, third controller
1843 0 = /dev/cciss/c2d0 First logical drive, whole disk
1844 16 = /dev/cciss/c2d1 Second logical drive, whole disk
1846 240 = /dev/cciss/c2d15 16th logical drive, whole disk
1848 Partitions are handled the same way as for Mylex
1849 DAC960 (see major number 48) except that the limit on
1852 107 char 3Dfx Voodoo Graphics device
1853 0 = /dev/3dfx Primary 3Dfx graphics device
1855 107 block Compaq Next Generation Drive Array, fourth controller
1856 0 = /dev/cciss/c3d0 First logical drive, whole disk
1857 16 = /dev/cciss/c3d1 Second logical drive, whole disk
1859 240 = /dev/cciss/c3d15 16th logical drive, whole disk
1861 Partitions are handled the same way as for Mylex
1862 DAC960 (see major number 48) except that the limit on
1865 108 char Device independent PPP interface
1866 0 = /dev/ppp Device independent PPP interface
1868 108 block Compaq Next Generation Drive Array, fifth controller
1869 0 = /dev/cciss/c4d0 First logical drive, whole disk
1870 16 = /dev/cciss/c4d1 Second logical drive, whole disk
1872 240 = /dev/cciss/c4d15 16th logical drive, whole disk
1874 Partitions are handled the same way as for Mylex
1875 DAC960 (see major number 48) except that the limit on
1878 109 char Reserved for logical volume manager
1880 109 block Compaq Next Generation Drive Array, sixth controller
1881 0 = /dev/cciss/c5d0 First logical drive, whole disk
1882 16 = /dev/cciss/c5d1 Second logical drive, whole disk
1884 240 = /dev/cciss/c5d15 16th logical drive, whole disk
1886 Partitions are handled the same way as for Mylex
1887 DAC960 (see major number 48) except that the limit on
1890 110 char miroMEDIA Surround board
1891 0 = /dev/srnd0 First miroMEDIA Surround board
1892 1 = /dev/srnd1 Second miroMEDIA Surround board
1895 110 block Compaq Next Generation Drive Array, seventh controller
1896 0 = /dev/cciss/c6d0 First logical drive, whole disk
1897 16 = /dev/cciss/c6d1 Second logical drive, whole disk
1899 240 = /dev/cciss/c6d15 16th logical drive, whole disk
1901 Partitions are handled the same way as for Mylex
1902 DAC960 (see major number 48) except that the limit on
1905 111 char Philips SAA7146-based audio/video card {2.6}
1906 0 = /dev/av0 First A/V card
1907 1 = /dev/av1 Second A/V card
1910 111 block Compaq Next Generation Drive Array, eigth controller
1911 0 = /dev/cciss/c7d0 First logical drive, whole disk
1912 16 = /dev/cciss/c7d1 Second logical drive, whole disk
1914 240 = /dev/cciss/c7d15 16th logical drive, whole disk
1916 Partitions are handled the same way as for Mylex
1917 DAC960 (see major number 48) except that the limit on
1920 112 char ISI serial card
1921 0 = /dev/ttyM0 First ISI port
1922 1 = /dev/ttyM1 Second ISI port
1925 There is currently a device-naming conflict between
1926 these and PAM multimodems (major 78).
1928 112 block IBM iSeries virtual disk
1929 0 = /dev/iseries/vda First virtual disk, whole disk
1930 8 = /dev/iseries/vdb Second virtual disk, whole disk
1932 200 = /dev/iseries/vdz 26th virtual disk, whole disk
1933 208 = /dev/iseries/vdaa 27th virtual disk, whole disk
1935 248 = /dev/iseries/vdaf 32nd virtual disk, whole disk
1937 Partitions are handled in the same way as for IDE
1938 disks (see major number 3) except that the limit on
1941 113 char ISI serial card - alternate devices
1942 0 = /dev/cum0 Callout device for ttyM0
1943 1 = /dev/cum1 Callout device for ttyM1
1946 113 block IBM iSeries virtual CD-ROM
1948 0 = /dev/iseries/vcda First virtual CD-ROM
1949 1 = /dev/iseries/vcdb Second virtual CD-ROM
1952 114 char Picture Elements ISE board
1953 0 = /dev/ise0 First ISE board
1954 1 = /dev/ise1 Second ISE board
1956 128 = /dev/isex0 Control node for first ISE board
1957 129 = /dev/isex1 Control node for second ISE board
1960 The ISE board is an embedded computer, optimized for
1961 image processing. The /dev/iseN nodes are the general
1962 I/O access to the board, the /dev/isex0 nodes command
1963 nodes used to control the board.
1965 114 block IDE BIOS powered software RAID interfaces such as the
1969 1 = /dev/ataraid/d0p1
1970 2 = /dev/ataraid/d0p2
1972 16 = /dev/ataraid/d1
1973 17 = /dev/ataraid/d1p1
1974 18 = /dev/ataraid/d1p2
1976 255 = /dev/ataraid/d15p15
1978 Partitions are handled in the same way as for IDE
1979 disks (see major number 3) except that the limit on
1982 115 char TI link cable devices (115 was formerly the console driver speaker)
1983 0 = /dev/tipar0 Parallel cable on first parallel port
1985 7 = /dev/tipar7 Parallel cable on seventh parallel port
1987 8 = /dev/tiser0 Serial cable on first serial port
1989 15 = /dev/tiser7 Serial cable on seventh serial port
1991 16 = /dev/tiusb0 First USB cable
1993 47 = /dev/tiusb31 32nd USB cable
1995 115 block NetWare (NWFS) Devices (0-255)
1997 The NWFS (NetWare) devices are used to present a
1998 collection of NetWare Mirror Groups or NetWare
1999 Partitions as a logical storage segment for
2000 use in mounting NetWare volumes. A maximum of
2001 256 NetWare volumes can be supported in a single
2004 http://www.kernel.org/pub/linux/kernel/people/jmerkey/nwfs
2006 0 = /dev/nwfs/v0 First NetWare (NWFS) Logical Volume
2007 1 = /dev/nwfs/v1 Second NetWare (NWFS) Logical Volume
2008 2 = /dev/nwfs/v2 Third NetWare (NWFS) Logical Volume
2010 255 = /dev/nwfs/v255 Last NetWare (NWFS) Logical Volume
2012 116 char Advanced Linux Sound Driver (ALSA)
2014 116 block MicroMemory battery backed RAM adapter (NVRAM)
2015 Supports 16 boards, 15 paritions each.
2016 Requested by neilb at cse.unsw.edu.au.
2018 0 = /dev/umem/d0 Whole of first board
2019 1 = /dev/umem/d0p1 First partition of first board
2020 2 = /dev/umem/d0p2 Second partition of first board
2021 15 = /dev/umem/d0p15 15th partition of first board
2023 16 = /dev/umem/d1 Whole of second board
2024 17 = /dev/umem/d1p1 First partition of second board
2026 255= /dev/umem/d15p15 15th partition of 16th board.
2028 117 char COSA/SRP synchronous serial card
2029 0 = /dev/cosa0c0 1st board, 1st channel
2030 1 = /dev/cosa0c1 1st board, 2nd channel
2032 16 = /dev/cosa1c0 2nd board, 1st channel
2033 17 = /dev/cosa1c1 2nd board, 2nd channel
2036 117 block Enterprise Volume Management System (EVMS)
2038 The EVMS driver uses a layered, plug-in model to provide
2039 unparalleled flexibility and extensibility in managing
2040 storage. This allows for easy expansion or customization
2041 of various levels of volume management. Requested by
2042 Mark Peloquin (peloquin at us.ibm.com).
2044 Note: EVMS populates and manages all the devnodes in
2047 http://sf.net/projects/evms
2049 0 = /dev/evms/block_device EVMS block device
2050 1 = /dev/evms/legacyname1 First EVMS legacy device
2051 2 = /dev/evms/legacyname2 Second EVMS legacy device
2053 Both ranges can grow (down or up) until they meet.
2055 254 = /dev/evms/EVMSname2 Second EVMS native device
2056 255 = /dev/evms/EVMSname1 First EVMS native device
2058 Note: legacyname(s) are derived from the normal legacy
2059 device names. For example, /dev/hda5 would become
2062 118 char Solidum ???
2066 128 = /dev/solnpctl0
2067 129 = /dev/solnpctl1
2070 119 char VMware virtual network control
2071 0 = /dev/vnet0 1st virtual network
2072 1 = /dev/vnet1 2nd virtual network
2075 120-127 char LOCAL/EXPERIMENTAL USE
2076 120-127 block LOCAL/EXPERIMENTAL USE
2077 Allocated for local/experimental use. For devices not
2078 assigned official numbers, these ranges should be
2079 used in order to avoid conflicting with future assignments.
2081 128-135 char Unix98 PTY masters
2083 These devices should not have corresponding device
2084 nodes; instead they should be accessed through the
2085 /dev/ptmx cloning interface.
2088 128 block SCSI disk devices (128-143)
2089 0 = /dev/sddy 129th SCSI disk whole disk
2090 16 = /dev/sddz 130th SCSI disk whole disk
2091 32 = /dev/sdea 131th SCSI disk whole disk
2093 240 = /dev/sden 144th SCSI disk whole disk
2095 Partitions are handled in the same way as for IDE
2096 disks (see major number 3) except that the limit on
2100 129 block SCSI disk devices (144-159)
2101 0 = /dev/sdeo 145th SCSI disk whole disk
2102 16 = /dev/sdep 146th SCSI disk whole disk
2103 32 = /dev/sdeq 147th SCSI disk whole disk
2105 240 = /dev/sdfd 160th SCSI disk whole disk
2107 Partitions are handled in the same way as for IDE
2108 disks (see major number 3) except that the limit on
2112 130 block SCSI disk devices (160-175)
2113 0 = /dev/sdfe 161st SCSI disk whole disk
2114 16 = /dev/sdff 162nd SCSI disk whole disk
2115 32 = /dev/sdfg 163rd SCSI disk whole disk
2117 240 = /dev/sdft 176th SCSI disk whole disk
2119 Partitions are handled in the same way as for IDE
2120 disks (see major number 3) except that the limit on
2123 131 block SCSI disk devices (176-191)
2124 0 = /dev/sdfu 177th SCSI disk whole disk
2125 16 = /dev/sdfv 178th SCSI disk whole disk
2126 32 = /dev/sdfw 179th SCSI disk whole disk
2128 240 = /dev/sdgj 192nd SCSI disk whole disk
2130 Partitions are handled in the same way as for IDE
2131 disks (see major number 3) except that the limit on
2135 132 block SCSI disk devices (192-207)
2136 0 = /dev/sdgk 193rd SCSI disk whole disk
2137 16 = /dev/sdgl 194th SCSI disk whole disk
2138 32 = /dev/sdgm 195th SCSI disk whole disk
2140 240 = /dev/sdgz 208th SCSI disk whole disk
2142 Partitions are handled in the same way as for IDE
2143 disks (see major number 3) except that the limit on
2147 133 block SCSI disk devices (208-223)
2148 0 = /dev/sdha 209th SCSI disk whole disk
2149 16 = /dev/sdhb 210th SCSI disk whole disk
2150 32 = /dev/sdhc 211th SCSI disk whole disk
2152 240 = /dev/sdhp 224th SCSI disk whole disk
2154 Partitions are handled in the same way as for IDE
2155 disks (see major number 3) except that the limit on
2159 134 block SCSI disk devices (224-239)
2160 0 = /dev/sdhq 225th SCSI disk whole disk
2161 16 = /dev/sdhr 226th SCSI disk whole disk
2162 32 = /dev/sdhs 227th SCSI disk whole disk
2164 240 = /dev/sdif 240th SCSI disk whole disk
2166 Partitions are handled in the same way as for IDE
2167 disks (see major number 3) except that the limit on
2171 135 block SCSI disk devices (240-255)
2172 0 = /dev/sdig 241st SCSI disk whole disk
2173 16 = /dev/sdih 242nd SCSI disk whole disk
2174 32 = /dev/sdih 243rd SCSI disk whole disk
2176 240 = /dev/sdiv 256th SCSI disk whole disk
2178 Partitions are handled in the same way as for IDE
2179 disks (see major number 3) except that the limit on
2183 136-143 char Unix98 PTY slaves
2184 0 = /dev/pts/0 First Unix98 pseudo-TTY
2185 1 = /dev/pts/1 Second Unix98 pesudo-TTY
2188 These device nodes are automatically generated with
2189 the proper permissions and modes by mounting the
2190 devpts filesystem onto /dev/pts with the appropriate
2191 mount options (distribution dependent, however, on
2192 *most* distributions the appropriate options are
2193 "mode=0620,gid=<gid of the "tty" group>".)
2195 136 block Mylex DAC960 PCI RAID controller; ninth controller
2196 0 = /dev/rd/c8d0 First disk, whole disk
2197 8 = /dev/rd/c8d1 Second disk, whole disk
2199 248 = /dev/rd/c8d31 32nd disk, whole disk
2201 Partitions are handled as for major 48.
2203 137 block Mylex DAC960 PCI RAID controller; tenth controller
2204 0 = /dev/rd/c9d0 First disk, whole disk
2205 8 = /dev/rd/c9d1 Second disk, whole disk
2207 248 = /dev/rd/c9d31 32nd disk, whole disk
2209 Partitions are handled as for major 48.
2211 138 block Mylex DAC960 PCI RAID controller; eleventh controller
2212 0 = /dev/rd/c10d0 First disk, whole disk
2213 8 = /dev/rd/c10d1 Second disk, whole disk
2215 248 = /dev/rd/c10d31 32nd disk, whole disk
2217 Partitions are handled as for major 48.
2219 139 block Mylex DAC960 PCI RAID controller; twelfth controller
2220 0 = /dev/rd/c11d0 First disk, whole disk
2221 8 = /dev/rd/c11d1 Second disk, whole disk
2223 248 = /dev/rd/c11d31 32nd disk, whole disk
2225 Partitions are handled as for major 48.
2227 140 block Mylex DAC960 PCI RAID controller; thirteenth controller
2228 0 = /dev/rd/c12d0 First disk, whole disk
2229 8 = /dev/rd/c12d1 Second disk, whole disk
2231 248 = /dev/rd/c12d31 32nd disk, whole disk
2233 Partitions are handled as for major 48.
2235 141 block Mylex DAC960 PCI RAID controller; fourteenth controller
2236 0 = /dev/rd/c13d0 First disk, whole disk
2237 8 = /dev/rd/c13d1 Second disk, whole disk
2239 248 = /dev/rd/c13d31 32nd disk, whole disk
2241 Partitions are handled as for major 48.
2243 142 block Mylex DAC960 PCI RAID controller; fifteenth controller
2244 0 = /dev/rd/c14d0 First disk, whole disk
2245 8 = /dev/rd/c14d1 Second disk, whole disk
2247 248 = /dev/rd/c14d31 32nd disk, whole disk
2249 Partitions are handled as for major 48.
2251 143 block Mylex DAC960 PCI RAID controller; sixteenth controller
2252 0 = /dev/rd/c15d0 First disk, whole disk
2253 8 = /dev/rd/c15d1 Second disk, whole disk
2255 248 = /dev/rd/c15d31 32nd disk, whole disk
2257 Partitions are handled as for major 48.
2259 144 char Encapsulated PPP
2260 0 = /dev/pppox0 First PPP over Ethernet
2262 63 = /dev/pppox63 64th PPP over Ethernet
2264 This is primarily used for ADSL.
2266 The SST 5136-DN DeviceNet interface driver has been
2267 relocated to major 183 due to an unfortunate conflict.
2269 144 block Expansion Area #1 for more non-device (e.g. NFS) mounts
2270 0 = mounted device 256
2271 255 = mounted device 511
2273 145 char SAM9407-based soundcard
2275 1 = /dev/sam0_sequencer
2276 2 = /dev/sam0_midi00
2279 6 = /dev/sam0_sndstat
2280 18 = /dev/sam0_midi01
2281 34 = /dev/sam0_midi02
2282 50 = /dev/sam0_midi03
2283 64 = /dev/sam1_mixer
2285 128 = /dev/sam2_mixer
2287 192 = /dev/sam3_mixer
2290 Device functions match OSS, but offer a number of
2291 addons, which are sam9407 specific. OSS can be
2292 operated simultaneously, taking care of the codec.
2294 145 block Expansion Area #2 for more non-device (e.g. NFS) mounts
2295 0 = mounted device 512
2296 255 = mounted device 767
2298 146 char SYSTRAM SCRAMNet mirrored-memory network
2299 0 = /dev/scramnet0 First SCRAMNet device
2300 1 = /dev/scramnet1 Second SCRAMNet device
2303 146 block Expansion Area #3 for more non-device (e.g. NFS) mounts
2304 0 = mounted device 768
2305 255 = mounted device 1023
2307 147 char Aureal Semiconductor Vortex Audio device
2308 0 = /dev/aureal0 First Aureal Vortex
2309 1 = /dev/aureal1 Second Aureal Vortex
2312 148 char Technology Concepts serial card
2313 0 = /dev/ttyT0 First TCL port
2314 1 = /dev/ttyT1 Second TCL port
2317 149 char Technology Concepts serial card - alternate devices
2318 0 = /dev/cut0 Callout device for ttyT0
2319 1 = /dev/cut0 Callout device for ttyT1
2322 150 char Real-Time Linux FIFOs
2323 0 = /dev/rtf0 First RTLinux FIFO
2324 1 = /dev/rtf1 Second RTLinux FIFO
2327 151 char DPT I2O SmartRaid V controller
2328 0 = /dev/dpti0 First DPT I2O adapter
2329 1 = /dev/dpti1 Second DPT I2O adapter
2332 152 char EtherDrive Control Device
2333 0 = /dev/etherd/ctl Connect/Disconnect an EtherDrive
2334 1 = /dev/etherd/err Monitor errors
2335 2 = /dev/etherd/raw Raw AoE packet monitor
2337 152 block EtherDrive Block Devices
2338 0 = /dev/etherd/0 EtherDrive 0
2340 255 = /dev/etherd/255 EtherDrive 255
2342 153 char SPI Bus Interface (sometimes referred to as MicroWire)
2343 0 = /dev/spi0 First SPI device on the bus
2344 1 = /dev/spi1 Second SPI device on the bus
2346 15 = /dev/spi15 Sixteenth SPI device on the bus
2348 154 char Specialix RIO serial card
2349 0 = /dev/ttySR0 First RIO port
2351 255 = /dev/ttySR255 256th RIO port
2353 155 char Specialix RIO serial card - alternate devices
2354 0 = /dev/cusr0 Callout device for ttySR0
2356 255 = /dev/cusr255 Callout device for ttySR255
2358 156 char Specialix RIO serial card
2359 0 = /dev/ttySR256 257th RIO port
2361 255 = /dev/ttySR511 512th RIO port
2363 157 char Specialix RIO serial card - alternate devices
2364 0 = /dev/cusr256 Callout device for ttySR256
2366 255 = /dev/cusr511 Callout device for ttySR511
2368 158 char Dialogic GammaLink fax driver
2369 0 = /dev/gfax0 GammaLink channel 0
2370 1 = /dev/gfax1 GammaLink channel 1
2375 160 char General Purpose Instrument Bus (GPIB)
2376 0 = /dev/gpib0 First GPIB bus
2377 1 = /dev/gpib1 Second GPIB bus
2380 160 block Carmel 8-port SATA Disks on First Controller
2381 0 = /dev/carmel/0 SATA disk 0 whole disk
2382 1 = /dev/carmel/0p1 SATA disk 0 partition 1
2384 31 = /dev/carmel/0p31 SATA disk 0 partition 31
2386 32 = /dev/carmel/1 SATA disk 1 whole disk
2387 64 = /dev/carmel/2 SATA disk 2 whole disk
2389 224 = /dev/carmel/7 SATA disk 7 whole disk
2391 Partitions are handled in the same way as for IDE
2392 disks (see major number 3) except that the limit on
2395 161 char IrCOMM devices (IrDA serial/parallel emulation)
2396 0 = /dev/ircomm0 First IrCOMM device
2397 1 = /dev/ircomm1 Second IrCOMM device
2399 16 = /dev/irlpt0 First IrLPT device
2400 17 = /dev/irlpt1 Second IrLPT device
2403 161 block Carmel 8-port SATA Disks on Second Controller
2404 0 = /dev/carmel/8 SATA disk 8 whole disk
2405 1 = /dev/carmel/8p1 SATA disk 8 partition 1
2407 31 = /dev/carmel/8p31 SATA disk 8 partition 31
2409 32 = /dev/carmel/9 SATA disk 9 whole disk
2410 64 = /dev/carmel/10 SATA disk 10 whole disk
2412 224 = /dev/carmel/15 SATA disk 15 whole disk
2414 Partitions are handled in the same way as for IDE
2415 disks (see major number 3) except that the limit on
2418 162 char Raw block device interface
2419 0 = /dev/rawctl Raw I/O control device
2420 1 = /dev/raw/raw1 First raw I/O device
2421 2 = /dev/raw/raw2 Second raw I/O device
2424 163 char UNASSIGNED (was Radio Tech BIM-XXX-RS232 radio modem - see 51)
2426 164 char Chase Research AT/PCI-Fast serial card
2427 0 = /dev/ttyCH0 AT/PCI-Fast board 0, port 0
2429 15 = /dev/ttyCH15 AT/PCI-Fast board 0, port 15
2430 16 = /dev/ttyCH16 AT/PCI-Fast board 1, port 0
2432 31 = /dev/ttyCH31 AT/PCI-Fast board 1, port 15
2433 32 = /dev/ttyCH32 AT/PCI-Fast board 2, port 0
2435 47 = /dev/ttyCH47 AT/PCI-Fast board 2, port 15
2436 48 = /dev/ttyCH48 AT/PCI-Fast board 3, port 0
2438 63 = /dev/ttyCH63 AT/PCI-Fast board 3, port 15
2440 165 char Chase Research AT/PCI-Fast serial card - alternate devices
2441 0 = /dev/cuch0 Callout device for ttyCH0
2443 63 = /dev/cuch63 Callout device for ttyCH63
2445 166 char ACM USB modems
2446 0 = /dev/ttyACM0 First ACM modem
2447 1 = /dev/ttyACM1 Second ACM modem
2450 167 char ACM USB modems - alternate devices
2451 0 = /dev/cuacm0 Callout device for ttyACM0
2452 1 = /dev/cuacm1 Callout device for ttyACM1
2455 168 char Eracom CSA7000 PCI encryption adaptor
2456 0 = /dev/ecsa0 First CSA7000
2457 1 = /dev/ecsa1 Second CSA7000
2460 169 char Eracom CSA8000 PCI encryption adaptor
2461 0 = /dev/ecsa8-0 First CSA8000
2462 1 = /dev/ecsa8-1 Second CSA8000
2465 170 char AMI MegaRAC remote access controller
2466 0 = /dev/megarac0 First MegaRAC card
2467 1 = /dev/megarac1 Second MegaRAC card
2470 171 char Reserved for IEEE 1394 (Firewire)
2473 172 char Moxa Intellio serial card
2474 0 = /dev/ttyMX0 First Moxa port
2475 1 = /dev/ttyMX1 Second Moxa port
2477 127 = /dev/ttyMX127 128th Moxa port
2478 128 = /dev/moxactl Moxa control port
2480 173 char Moxa Intellio serial card - alternate devices
2481 0 = /dev/cumx0 Callout device for ttyMX0
2482 1 = /dev/cumx1 Callout device for ttyMX1
2484 127 = /dev/cumx127 Callout device for ttyMX127
2486 174 char SmartIO serial card
2487 0 = /dev/ttySI0 First SmartIO port
2488 1 = /dev/ttySI1 Second SmartIO port
2491 175 char SmartIO serial card - alternate devices
2492 0 = /dev/cusi0 Callout device for ttySI0
2493 1 = /dev/cusi1 Callout device for ttySI1
2496 176 char nCipher nFast PCI crypto accelerator
2497 0 = /dev/nfastpci0 First nFast PCI device
2498 1 = /dev/nfastpci1 First nFast PCI device
2501 177 char TI PCILynx memory spaces
2502 0 = /dev/pcilynx/aux0 AUX space of first PCILynx card
2504 15 = /dev/pcilynx/aux15 AUX space of 16th PCILynx card
2505 16 = /dev/pcilynx/rom0 ROM space of first PCILynx card
2507 31 = /dev/pcilynx/rom15 ROM space of 16th PCILynx card
2508 32 = /dev/pcilynx/ram0 RAM space of first PCILynx card
2510 47 = /dev/pcilynx/ram15 RAM space of 16th PCILynx card
2512 178 char Giganet cLAN1xxx virtual interface adapter
2513 0 = /dev/clanvi0 First cLAN adapter
2514 1 = /dev/clanvi1 Second cLAN adapter
2517 179 char CCube DVXChip-based PCI products
2518 0 = /dev/dvxirq0 First DVX device
2519 1 = /dev/dvxirq1 Second DVX device
2522 180 char USB devices
2523 0 = /dev/usb/lp0 First USB printer
2525 15 = /dev/usb/lp15 16th USB printer
2526 16 = /dev/usb/mouse0 First USB mouse
2528 31 = /dev/usb/mouse15 16th USB mouse
2529 32 = /dev/usb/ez0 First USB firmware loader
2531 47 = /dev/usb/ez15 16th USB firmware loader
2532 48 = /dev/usb/scanner0 First USB scanner
2534 63 = /dev/usb/scanner15 16th USB scanner
2535 64 = /dev/usb/rio500 Diamond Rio 500
2536 65 = /dev/usb/usblcd USBLCD Interface (info@usblcd.de)
2537 66 = /dev/usb/cpad0 Synaptics cPad (mouse/LCD)
2540 181 char Conrad Electronic parallel port radio clocks
2541 0 = /dev/pcfclock0 First Conrad radio clock
2542 1 = /dev/pcfclock1 Second Conrad radio clock
2545 182 char Picture Elements THR2 binarizer
2546 0 = /dev/pethr0 First THR2 board
2547 1 = /dev/pethr1 Second THR2 board
2550 183 char SST 5136-DN DeviceNet interface
2551 0 = /dev/ss5136dn0 First DeviceNet interface
2552 1 = /dev/ss5136dn1 Second DeviceNet interface
2555 This device used to be assigned to major number 144.
2556 It had to be moved due to an unfortunate conflict.
2558 184 char Picture Elements' video simulator/sender
2559 0 = /dev/pevss0 First sender board
2560 1 = /dev/pevss1 Second sender board
2563 185 char InterMezzo high availability file system
2564 0 = /dev/intermezzo0 First cache manager
2565 1 = /dev/intermezzo1 Second cache manager
2568 See http://www.inter-mezzo.org/ for more information.
2570 186 char Object-based storage control device
2571 0 = /dev/obd0 First obd control device
2572 1 = /dev/obd1 Second obd control device
2575 See ftp://ftp.lustre.org/pub/obd for code and information.
2577 187 char DESkey hardware encryption device
2578 0 = /dev/deskey0 First DES key
2579 1 = /dev/deskey1 Second DES key
2582 188 char USB serial converters
2583 0 = /dev/ttyUSB0 First USB serial converter
2584 1 = /dev/ttyUSB1 Second USB serial converter
2587 189 char USB serial converters - alternate devices
2588 0 = /dev/cuusb0 Callout device for ttyUSB0
2589 1 = /dev/cuusb1 Callout device for ttyUSB1
2592 190 char Kansas City tracker/tuner card
2593 0 = /dev/kctt0 First KCT/T card
2594 1 = /dev/kctt1 Second KCT/T card
2597 191 char Reserved for PCMCIA
2599 192 char Kernel profiling interface
2600 0 = /dev/profile Profiling control device
2601 1 = /dev/profile0 Profiling device for CPU 0
2602 2 = /dev/profile1 Profiling device for CPU 1
2605 193 char Kernel event-tracing interface
2606 0 = /dev/trace Tracing control device
2607 1 = /dev/trace0 Tracing device for CPU 0
2608 2 = /dev/trace1 Tracing device for CPU 1
2611 194 char linVideoStreams (LINVS)
2612 0 = /dev/mvideo/status0 Video compression status
2613 1 = /dev/mvideo/stream0 Video stream
2614 2 = /dev/mvideo/frame0 Single compressed frame
2615 3 = /dev/mvideo/rawframe0 Raw uncompressed frame
2616 4 = /dev/mvideo/codec0 Direct codec access
2617 5 = /dev/mvideo/video4linux0 Video4Linux compatibility
2619 16 = /dev/mvideo/status1 Second device
2621 32 = /dev/mvideo/status2 Third device
2624 240 = /dev/mvideo/status15 16th device
2627 195 char Nvidia graphics devices
2628 0 = /dev/nvidia0 First Nvidia card
2629 1 = /dev/nvidia1 Second Nvidia card
2631 255 = /dev/nvidiactl Nvidia card control device
2633 196 char Tormenta T1 card
2634 0 = /dev/tor/0 Master control channel for all cards
2635 1 = /dev/tor/1 First DS0
2636 2 = /dev/tor/2 Second DS0
2638 48 = /dev/tor/48 48th DS0
2639 49 = /dev/tor/49 First pseudo-channel
2640 50 = /dev/tor/50 Second pseudo-channel
2643 197 char OpenTNF tracing facility
2644 0 = /dev/tnf/t0 Trace 0 data extraction
2645 1 = /dev/tnf/t1 Trace 1 data extraction
2647 128 = /dev/tnf/status Tracing facility status
2648 130 = /dev/tnf/trace Tracing device
2650 198 char Total Impact TPMP2 quad coprocessor PCI card
2651 0 = /dev/tpmp2/0 First card
2652 1 = /dev/tpmp2/1 Second card
2655 199 char Veritas volume manager (VxVM) volumes
2656 0 = /dev/vx/rdsk/*/* First volume
2657 1 = /dev/vx/rdsk/*/* Second volume
2660 199 block Veritas volume manager (VxVM) volumes
2661 0 = /dev/vx/dsk/*/* First volume
2662 1 = /dev/vx/dsk/*/* Second volume
2665 The namespace in these directories is maintained by
2666 the user space VxVM software.
2668 200 char Veritas VxVM configuration interface
2669 0 = /dev/vx/config Configuration access node
2670 1 = /dev/vx/trace Volume i/o trace access node
2671 2 = /dev/vx/iod Volume i/o daemon access node
2672 3 = /dev/vx/info Volume information access node
2673 4 = /dev/vx/task Volume tasks access node
2674 5 = /dev/vx/taskmon Volume tasks monitor daemon
2676 201 char Veritas VxVM dynamic multipathing driver
2677 0 = /dev/vx/rdmp/* First multipath device
2678 1 = /dev/vx/rdmp/* Second multipath device
2680 201 block Veritas VxVM dynamic multipathing driver
2681 0 = /dev/vx/dmp/* First multipath device
2682 1 = /dev/vx/dmp/* Second multipath device
2685 The namespace in these directories is maintained by
2686 the user space VxVM software.
2688 202 char CPU model-specific registers
2689 0 = /dev/cpu/0/msr MSRs on CPU 0
2690 1 = /dev/cpu/1/msr MSRs on CPU 1
2693 203 char CPU CPUID information
2694 0 = /dev/cpu/0/cpuid CPUID on CPU 0
2695 1 = /dev/cpu/1/cpuid CPUID on CPU 1
2698 204 char Low-density serial ports
2699 0 = /dev/ttyLU0 LinkUp Systems L72xx UART - port 0
2700 1 = /dev/ttyLU1 LinkUp Systems L72xx UART - port 1
2701 2 = /dev/ttyLU2 LinkUp Systems L72xx UART - port 2
2702 3 = /dev/ttyLU3 LinkUp Systems L72xx UART - port 3
2703 4 = /dev/ttyFB0 Intel Footbridge (ARM)
2704 5 = /dev/ttySA0 StrongARM builtin serial port 0
2705 6 = /dev/ttySA1 StrongARM builtin serial port 1
2706 7 = /dev/ttySA2 StrongARM builtin serial port 2
2707 8 = /dev/ttySC0 SCI serial port (SuperH) - port 0
2708 9 = /dev/ttySC1 SCI serial port (SuperH) - port 1
2709 10 = /dev/ttySC2 SCI serial port (SuperH) - port 2
2710 11 = /dev/ttySC3 SCI serial port (SuperH) - port 3
2711 12 = /dev/ttyFW0 Firmware console - port 0
2712 13 = /dev/ttyFW1 Firmware console - port 1
2713 14 = /dev/ttyFW2 Firmware console - port 2
2714 15 = /dev/ttyFW3 Firmware console - port 3
2715 16 = /dev/ttyAM0 ARM "AMBA" serial port 0
2717 31 = /dev/ttyAM15 ARM "AMBA" serial port 15
2718 32 = /dev/ttyDB0 DataBooster serial port 0
2720 39 = /dev/ttyDB7 DataBooster serial port 7
2722 205 char Low-density serial ports (alternate device)
2723 0 = /dev/culu0 Callout device for ttyLU0
2724 1 = /dev/culu1 Callout device for ttyLU1
2725 2 = /dev/culu2 Callout device for ttyLU2
2726 3 = /dev/culu3 Callout device for ttyLU3
2727 4 = /dev/cufb0 Callout device for ttyFB0
2728 5 = /dev/cusa0 Callout device for ttySA0
2729 6 = /dev/cusa1 Callout device for ttySA1
2730 7 = /dev/cusa2 Callout device for ttySA2
2731 8 = /dev/cusc0 Callout device for ttySC0
2732 9 = /dev/cusc1 Callout device for ttySC1
2733 10 = /dev/cusc2 Callout device for ttySC2
2734 11 = /dev/cusc3 Callout device for ttySC3
2735 12 = /dev/cufw0 Callout device for ttyFW0
2736 13 = /dev/cufw1 Callout device for ttyFW1
2737 14 = /dev/cufw2 Callout device for ttyFW2
2738 15 = /dev/cufw3 Callout device for ttyFW3
2739 16 = /dev/cuam0 Callout device for ttyAM0
2741 31 = /dev/cuam15 Callout device for ttyAM15
2742 32 = /dev/cudb0 Callout device for ttyDB0
2744 39 = /dev/cudb7 Callout device for ttyDB7
2746 206 char OnStream SC-x0 tape devices
2747 0 = /dev/osst0 First OnStream SCSI tape, mode 0
2748 1 = /dev/osst1 Second OnStream SCSI tape, mode 0
2750 32 = /dev/osst0l First OnStream SCSI tape, mode 1
2751 33 = /dev/osst1l Second OnStream SCSI tape, mode 1
2753 64 = /dev/osst0m First OnStream SCSI tape, mode 2
2754 65 = /dev/osst1m Second OnStream SCSI tape, mode 2
2756 96 = /dev/osst0a First OnStream SCSI tape, mode 3
2757 97 = /dev/osst1a Second OnStream SCSI tape, mode 3
2759 128 = /dev/nosst0 No rewind version of /dev/osst0
2760 129 = /dev/nosst1 No rewind version of /dev/osst1
2762 160 = /dev/nosst0l No rewind version of /dev/osst0l
2763 161 = /dev/nosst1l No rewind version of /dev/osst1l
2765 192 = /dev/nosst0m No rewind version of /dev/osst0m
2766 193 = /dev/nosst1m No rewind version of /dev/osst1m
2768 224 = /dev/nosst0a No rewind version of /dev/osst0a
2769 225 = /dev/nosst1a No rewind version of /dev/osst1a
2772 The OnStream SC-x0 SCSI tapes do not support the
2773 standard SCSI SASD command set and therefore need
2774 their own driver "osst". Note that the IDE, USB (and
2775 maybe ParPort) versions may be driven via ide-scsi or
2776 usb-storage SCSI emulation and this osst device and
2777 driver as well. The ADR-x0 drives are QIC-157
2778 compliant and don't need osst.
2780 207 char Compaq ProLiant health feature indicate
2781 0 = /dev/cpqhealth/cpqw Redirector interface
2782 1 = /dev/cpqhealth/crom EISA CROM
2783 2 = /dev/cpqhealth/cdt Data Table
2784 3 = /dev/cpqhealth/cevt Event Log
2785 4 = /dev/cpqhealth/casr Automatic Server Recovery
2786 5 = /dev/cpqhealth/cecc ECC Memory
2787 6 = /dev/cpqhealth/cmca Machine Check Architecture
2788 7 = /dev/cpqhealth/ccsm Deprecated CDT
2789 8 = /dev/cpqhealth/cnmi NMI Handling
2790 9 = /dev/cpqhealth/css Sideshow Management
2791 10 = /dev/cpqhealth/cram CMOS interface
2792 11 = /dev/cpqhealth/cpci PCI IRQ interface
2794 208 char User space serial ports
2795 0 = /dev/ttyU0 First user space serial port
2796 1 = /dev/ttyU1 Second user space serial port
2799 209 char User space serial ports (alternate devices)
2800 0 = /dev/cuu0 Callout device for ttyU0
2801 1 = /dev/cuu1 Callout device for ttyU1
2804 210 char SBE, Inc. sync/async serial card
2805 0 = /dev/sbei/wxcfg0 Configuration device for board 0
2806 1 = /dev/sbei/dld0 Download device for board 0
2807 2 = /dev/sbei/wan00 WAN device, port 0, board 0
2808 3 = /dev/sbei/wan01 WAN device, port 1, board 0
2809 4 = /dev/sbei/wan02 WAN device, port 2, board 0
2810 5 = /dev/sbei/wan03 WAN device, port 3, board 0
2811 6 = /dev/sbei/wanc00 WAN clone device, port 0, board 0
2812 7 = /dev/sbei/wanc01 WAN clone device, port 1, board 0
2813 8 = /dev/sbei/wanc02 WAN clone device, port 2, board 0
2814 9 = /dev/sbei/wanc03 WAN clone device, port 3, board 0
2815 10 = /dev/sbei/wxcfg1 Configuration device for board 1
2816 11 = /dev/sbei/dld1 Download device for board 1
2817 12 = /dev/sbei/wan10 WAN device, port 0, board 1
2818 13 = /dev/sbei/wan11 WAN device, port 1, board 1
2819 14 = /dev/sbei/wan12 WAN device, port 2, board 1
2820 15 = /dev/sbei/wan13 WAN device, port 3, board 1
2821 16 = /dev/sbei/wanc10 WAN clone device, port 0, board 1
2822 17 = /dev/sbei/wanc11 WAN clone device, port 1, board 1
2823 18 = /dev/sbei/wanc12 WAN clone device, port 2, board 1
2824 19 = /dev/sbei/wanc13 WAN clone device, port 3, board 1
2827 Yes, each board is really spaced 10 (decimal) apart.
2829 211 char Addinum CPCI1500 digital I/O card
2830 0 = /dev/addinum/cpci1500/0 First CPCI1500 card
2831 1 = /dev/addinum/cpci1500/1 Second CPCI1500 card
2834 212 char LinuxTV.org DVB driver subsystem
2836 0 = /dev/dvb/adapter0/video0 first video decoder of first card
2837 1 = /dev/dvb/adapter0/audio0 first audio decoder of first card
2838 2 = /dev/dvb/adapter0/sec0 (obsolete/unused)
2839 3 = /dev/dvb/adapter0/frontend0 first frontend device of first card
2840 4 = /dev/dvb/adapter0/demux0 first demux device of first card
2841 5 = /dev/dvb/adapter0/dvr0 first digital video recoder device of first card
2842 6 = /dev/dvb/adapter0/ca0 first common access port of first card
2843 7 = /dev/dvb/adapter0/net0 first network device of first card
2844 8 = /dev/dvb/adapter0/osd0 first on-screen-display device of first card
2845 9 = /dev/dvb/adapter0/video1 second video decoder of first card
2847 64 = /dev/dvb/adapter1/video0 first video decoder of second card
2849 128 = /dev/dvb/adapter2/video0 first video decoder of third card
2851 196 = /dev/dvb/adapter3/video0 first video decoder of fourth card
2854 216 char USB BlueTooth devices
2855 0 = /dev/ttyUB0 First USB BlueTooth device
2856 1 = /dev/ttyUB1 Second USB BlueTooth device
2859 217 char USB BlueTooth devices (alternate devices)
2860 0 = /dev/cuub0 Callout device for ttyUB0
2861 1 = /dev/cuub1 Callout device for ttyUB1
2864 218 char The Logical Company bus Unibus/Qbus adapters
2865 0 = /dev/logicalco/bci/0 First bus adapter
2866 1 = /dev/logicalco/bci/1 First bus adapter
2869 219 char The Logical Company DCI-1300 digital I/O card
2870 0 = /dev/logicalco/dci1300/0 First DCI-1300 card
2871 1 = /dev/logicalco/dci1300/1 Second DCI-1300 card
2874 220 char Myricom Myrinet "GM" board
2875 0 = /dev/myricom/gm0 First Myrinet GM board
2876 1 = /dev/myricom/gmp0 First board "root access"
2877 2 = /dev/myricom/gm1 Second Myrinet GM board
2878 3 = /dev/myricom/gmp1 Second board "root access"
2882 0 = /dev/bus/vme/m0 First master image
2883 1 = /dev/bus/vme/m1 Second master image
2884 2 = /dev/bus/vme/m2 Third master image
2885 3 = /dev/bus/vme/m3 Fourth master image
2886 4 = /dev/bus/vme/s0 First slave image
2887 5 = /dev/bus/vme/s1 Second slave image
2888 6 = /dev/bus/vme/s2 Third slave image
2889 7 = /dev/bus/vme/s3 Fourth slave image
2890 8 = /dev/bus/vme/ctl Control
2892 It is expected that all VME bus drivers will use the
2893 same interface. For interface documentation see
2894 http://www.vmelinux.org/.
2896 224 char A2232 serial card
2897 0 = /dev/ttyY0 First A2232 port
2898 1 = /dev/ttyY1 Second A2232 port
2901 225 char A2232 serial card (alternate devices)
2902 0 = /dev/cuy0 Callout device for ttyY0
2903 1 = /dev/cuy1 Callout device for ttyY1
2906 226 char Direct Rendering Infrastructure (DRI)
2907 0 = /dev/dri/card0 First graphics card
2908 1 = /dev/dri/card1 Second graphics card
2911 227 char IBM 3270 terminal Unix tty access
2912 1 = /dev/3270/tty1 First 3270 terminal
2913 2 = /dev/3270/tty2 Seconds 3270 terminal
2916 228 char IBM 3270 terminal block-mode access
2917 0 = /dev/3270/tub Controlling interface
2918 1 = /dev/3270/tub1 First 3270 terminal
2919 2 = /dev/3270/tub2 Second 3270 terminal
2922 229 char IBM iSeries virtual console
2923 0 = /dev/iseries/vtty0 First console port
2924 1 = /dev/iseries/vtty1 Second console port
2927 230 char IBM iSeries virtual tape
2928 0 = /dev/iseries/vt0 First virtual tape, mode 0
2929 1 = /dev/iseries/vt1 Second virtual tape, mode 0
2931 32 = /dev/iseries/vt0l First virtual tape, mode 1
2932 33 = /dev/iseries/vt1l Second virtual tape, mode 1
2934 64 = /dev/iseries/vt0m First virtual tape, mode 2
2935 65 = /dev/iseries/vt1m Second virtual tape, mode 2
2937 96 = /dev/iseries/vt0a First virtual tape, mode 3
2938 97 = /dev/iseries/vt1a Second virtual tape, mode 3
2940 128 = /dev/iseries/nvt0 First virtual tape, mode 0, no rewind
2941 129 = /dev/iseries/nvt1 Second virtual tape, mode 0, no rewind
2943 160 = /dev/iseries/nvt0l First virtual tape, mode 1, no rewind
2944 161 = /dev/iseries/nvt1l Second virtual tape, mode 1, no rewind
2946 192 = /dev/iseries/nvt0m First virtual tape, mode 2, no rewind
2947 193 = /dev/iseries/nvt1m Second virtual tape, mode 2, no rewind
2949 224 = /dev/iseries/nvt0a First virtual tape, mode 3, no rewind
2950 225 = /dev/iseries/nvt1a Second virtual tape, mode 3, no rewind
2953 "No rewind" refers to the omission of the default
2954 automatic rewind on device close. The MTREW or MTOFFL
2955 ioctl()'s can be used to rewind the tape regardless of
2956 the device used to access it.
2960 240-254 char LOCAL/EXPERIMENTAL USE
2961 240-254 block LOCAL/EXPERIMENTAL USE
2962 Allocated for local/experimental use. For devices not
2963 assigned official numbers, these ranges should be
2964 used in order to avoid conflicting with future assignments.
2969 This major is reserved to assist the expansion to a
2970 larger number space. No device nodes with this major
2971 should ever be created on the filesystem.
2973 **** ADDITIONAL /dev DIRECTORY ENTRIES
2975 This section details additional entries that should or may exist in
2976 the /dev directory. It is preferred that symbolic links use the same
2977 form (absolute or relative) as is indicated here. Links are
2978 classified as "hard" or "symbolic" depending on the preferred type of
2979 link; if possible, the indicated type of link should be used.
2984 These links should exist on all systems:
2986 /dev/fd /proc/self/fd symbolic File descriptors
2987 /dev/stdin fd/0 symbolic stdin file descriptor
2988 /dev/stdout fd/1 symbolic stdout file descriptor
2989 /dev/stderr fd/2 symbolic stderr file descriptor
2990 /dev/nfsd socksys symbolic Required by iBCS-2
2991 /dev/X0R null symbolic Required by iBCS-2
2993 Note: /dev/X0R is <letter X>-<digit 0>-<letter R>.
2997 It is recommended that these links exist on all systems:
2999 /dev/core /proc/kcore symbolic Backward compatibility
3000 /dev/ramdisk ram0 symbolic Backward compatibility
3001 /dev/ftape qft0 symbolic Backward compatibility
3002 /dev/bttv0 video0 symbolic Backward compatibility
3003 /dev/radio radio0 symbolic Backward compatibility
3004 /dev/i2o* /dev/i2o/* symbolic Backward compatibility
3005 /dev/scd? sr? hard Alternate SCSI CD-ROM name
3007 Locally defined links
3009 The following links may be established locally to conform to the
3010 configuration of the system. This is merely a tabulation of existing
3011 practice, and does not constitute a recommendation. However, if they
3012 exist, they should have the following uses.
3014 /dev/mouse mouse port symbolic Current mouse device
3015 /dev/tape tape device symbolic Current tape device
3016 /dev/cdrom CD-ROM device symbolic Current CD-ROM device
3017 /dev/cdwriter CD-writer symbolic Current CD-writer device
3018 /dev/scanner scanner symbolic Current scanner device
3019 /dev/modem modem port symbolic Current dialout device
3020 /dev/root root device symbolic Current root filesystem
3021 /dev/swap swap device symbolic Current swap device
3023 /dev/modem should not be used for a modem which supports dialin as
3024 well as dialout, as it tends to cause lock file problems. If it
3025 exists, /dev/modem should point to the appropriate primary TTY device
3026 (the use of the alternate callout devices is deprecated).
3028 For SCSI devices, /dev/tape and /dev/cdrom should point to the
3029 ``cooked'' devices (/dev/st* and /dev/sr*, respectively), whereas
3030 /dev/cdwriter and /dev/scanner should point to the appropriate generic
3031 SCSI devices (/dev/sg*).
3033 /dev/mouse may point to a primary serial TTY device, a hardware mouse
3034 device, or a socket for a mouse driver program (e.g. /dev/gpmdata).
3038 Non-transient sockets and named pipes may exist in /dev. Common entries are:
3040 /dev/printer socket lpd local socket
3041 /dev/log socket syslog local socket
3042 /dev/gpmdata socket gpm mouse multiplexer
3046 The following names are reserved for mounting special filesystems
3047 under /dev. These special filesystems provide kernel interfaces that
3048 cannot be provided with standard device nodes.
3050 /dev/pts devpts PTY slave filesystem
3051 /dev/shm tmpfs POSIX shared memory maintenance access
3053 **** TERMINAL DEVICES
3055 Terminal, or TTY devices are a special class of character devices. A
3056 terminal device is any device that could act as a controlling terminal
3057 for a session; this includes virtual consoles, serial ports, and
3058 pseudoterminals (PTYs).
3060 All terminal devices share a common set of capabilities known as line
3061 diciplines; these include the common terminal line dicipline as well
3062 as SLIP and PPP modes.
3064 All terminal devices are named similarly; this section explains the
3065 naming and use of the various types of TTYs. Note that the naming
3066 conventions include several historical warts; some of these are
3067 Linux-specific, some were inherited from other systems, and some
3068 reflect Linux outgrowing a borrowed convention.
3070 A hash mark (#) in a device name is used here to indicate a decimal
3071 number without leading zeroes.
3073 Virtual consoles and the console device
3075 Virtual consoles are full-screen terminal displays on the system video
3076 monitor. Virtual consoles are named /dev/tty#, with numbering
3077 starting at /dev/tty1; /dev/tty0 is the current virtual console.
3078 /dev/tty0 is the device that should be used to access the system video
3079 card on those architectures for which the frame buffer devices
3080 (/dev/fb*) are not applicable. Do not use /dev/console
3083 The console device, /dev/console, is the device to which system
3084 messages should be sent, and on which logins should be permitted in
3085 single-user mode. Starting with Linux 2.1.71, /dev/console is managed
3086 by the kernel; for previous versions it should be a symbolic link to
3087 either /dev/tty0, a specific virtual console such as /dev/tty1, or to
3088 a serial port primary (tty*, not cu*) device, depending on the
3089 configuration of the system.
3093 Serial ports are RS-232 serial ports and any device which simulates
3094 one, either in hardware (such as internal modems) or in software (such
3095 as the ISDN driver.) Under Linux, each serial ports has two device
3096 names, the primary or callin device and the alternate or callout one.
3097 Each kind of device is indicated by a different letter. For any
3098 letter X, the names of the devices are /dev/ttyX# and /dev/cux#,
3099 respectively; for historical reasons, /dev/ttyS# and /dev/ttyC#
3100 correspond to /dev/cua# and /dev/cub#. In the future, it should be
3101 expected that multiple letters will be used; all letters will be upper
3102 case for the "tty" device (e.g. /dev/ttyDP#) and lower case for the
3103 "cu" device (e.g. /dev/cudp#).
3105 The names /dev/ttyQ# and /dev/cuq# are reserved for local use.
3107 The alternate devices provide for kernel-based exclusion and somewhat
3108 different defaults than the primary devices. Their main purpose is to
3109 allow the use of serial ports with programs with no inherent or broken
3110 support for serial ports. Their use is deprecated, and they may be
3111 removed from a future version of Linux.
3113 Arbitration of serial ports is provided by the use of lock files with
3114 the names /var/lock/LCK..ttyX#. The contents of the lock file should
3115 be the PID of the locking process as an ASCII number.
3117 It is common practice to install links such as /dev/modem
3118 which point to serial ports. In order to ensure proper locking in the
3119 presence of these links, it is recommended that software chase
3120 symlinks and lock all possible names; additionally, it is recommended
3121 that a lock file be installed with the corresponding alternate
3122 device. In order to avoid deadlocks, it is recommended that the locks
3123 are acquired in the following order, and released in the reverse:
3125 1. The symbolic link name, if any (/var/lock/LCK..modem)
3126 2. The "tty" name (/var/lock/LCK..ttyS2)
3127 3. The alternate device name (/var/lock/LCK..cua2)
3129 In the case of nested symbolic links, the lock files should be
3130 installed in the order the symlinks are resolved.
3132 Under no circumstances should an application hold a lock while waiting
3133 for another to be released. In addition, applications which attempt
3134 to create lock files for the corresponding alternate device names
3135 should take into account the possibility of being used on a non-serial
3136 port TTY, for which no alternate device would exist.
3138 Pseudoterminals (PTYs)
3140 Pseudoterminals, or PTYs, are used to create login sessions or provide
3141 other capabilities requiring a TTY line dicipline (including SLIP or
3142 PPP capability) to arbitrary data-generation processes. Each PTY has
3143 a master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named
3144 /dev/tty[p-za-e][0-9a-f]. The kernel arbitrates the use of PTYs by
3145 allowing each master side to be opened only once.
3147 Once the master side has been opened, the corresponding slave device
3148 can be used in the same manner as any TTY device. The master and
3149 slave devices are connected by the kernel, generating the equivalent
3150 of a bidirectional pipe with TTY capabilities.
3152 Recent versions of the Linux kernels and GNU libc contain support for
3153 the System V/Unix98 naming scheme for PTYs, which assigns a common
3154 device, /dev/ptmx, to all the masters (opening it will automatically
3155 give you a previously unassigned PTY) and a subdirectory, /dev/pts,
3156 for the slaves; the slaves are named with decimal integers (/dev/pts/#
3157 in our notation). This removes the problem of exhausting the
3158 namespace and enables the kernel to automatically create the device
3159 nodes for the slaves on demand using the "devpts" filesystem.
git://git.onelab.eu / linux-2.6.git / blob