LINUX ALLOCATED DEVICES (2.6+ version)
- Maintained by Torben Mathiasen <device@lanana.org>
+ Maintained by Alan Cox <device@lanana.org>
- Last revised: 25 January 2005
+ Last revised: 6th April 2009
This list is the Linux Device List, the official registry of allocated
device numbers and /dev directory nodes for the Linux operating
in "batch mode", so there is likely additional registrations that
haven't been listed yet.
+Fourth, remember that Linux now has extensive support for dynamic allocation
+of device numbering and can use sysfs and udev to handle the naming needs.
+There are still some exceptions in the serial and boot device area. Before
+asking for a device number make sure you actually need one.
+
Finally, sometimes I have to play "namespace police." Please don't be
offended. I often get submissions for /dev names that would be bound
to cause conflicts down the road. I am trying to avoid getting in a
7 = /dev/full Returns ENOSPC on write
8 = /dev/random Nondeterministic random number gen.
9 = /dev/urandom Faster, less secure random number gen.
- 10 = /dev/aio Asyncronous I/O notification interface
+ 10 = /dev/aio Asynchronous I/O notification interface
11 = /dev/kmsg Writes to this come out as printk's
- 12 = /dev/oldmem Access to crash dump from kexec kernel
+ 12 = /dev/oldmem Used by crashdump kernels to access
+ the memory of the kernel that crashed.
+
1 block RAM disk
0 = /dev/ram0 First RAM disk
1 = /dev/ram1 Second RAM disk
...
- 250 = /dev/initrd Initial RAM disk {2.6}
+ 250 = /dev/initrd Initial RAM disk
Older kernels had /dev/ramdisk (1, 1) here.
/dev/initrd refers to a RAM disk which was preloaded
devices are on major 128 and above and use the PTY
master multiplex (/dev/ptmx) to acquire a PTY on
demand.
-
+
2 block Floppy disks
0 = /dev/fd0 Controller 0, drive 0, autodetect
1 = /dev/fd1 Controller 0, drive 1, autodetect
129 = /dev/vcsa1 tty1 text/attribute contents
...
191 = /dev/vcsa63 tty63 text/attribute contents
-
+
NOTE: These devices permit both read and write access.
7 block Loopback devices
- 0 = /dev/loop0 First loopback device
- 1 = /dev/loop1 Second loopback device
+ 0 = /dev/loop0 First loop device
+ 1 = /dev/loop1 Second loop device
...
- The loopback devices are used to mount filesystems not
+ The loop devices are used to mount filesystems not
associated with block devices. The binding to the
- loopback devices is handled by mount(8) or losetup(8).
+ loop devices is handled by mount(8) or losetup(8).
8 block SCSI disk devices (0-15)
0 = /dev/sda First SCSI disk whole disk
14 = /dev/touchscreen/ucb1x00 UCB 1x00 touchscreen
15 = /dev/touchscreen/mk712 MK712 touchscreen
128 = /dev/beep Fancy beep device
- 129 = /dev/modreq Kernel module load request {2.6}
+ 129 =
130 = /dev/watchdog Watchdog timer port
131 = /dev/temperature Machine internal temperature
132 = /dev/hwtrap Hardware fault trap
139 = /dev/openprom SPARC OpenBoot PROM
140 = /dev/relay8 Berkshire Products Octal relay card
141 = /dev/relay16 Berkshire Products ISO-16 relay card
- 142 = /dev/msr x86 model-specific registers {2.6}
+ 142 =
143 = /dev/pciconf PCI configuration space
144 = /dev/nvram Non-volatile configuration RAM
- 145 = /dev/hfmodem Soundcard shortwave modem control {2.6}
+ 145 = /dev/hfmodem Soundcard shortwave modem control
146 = /dev/graphics Linux/SGI graphics device
147 = /dev/opengl Linux/SGI OpenGL pipe
148 = /dev/gfx Linux/SGI graphics effects device
207 = /dev/video/em8300_sp EM8300 DVD decoder subpicture
208 = /dev/compaq/cpqphpc Compaq PCI Hot Plug Controller
209 = /dev/compaq/cpqrid Compaq Remote Insight Driver
- 210 = /dev/impi/bt IMPI coprocessor block transfer
+ 210 = /dev/impi/bt IMPI coprocessor block transfer
211 = /dev/impi/smic IMPI coprocessor stream interface
212 = /dev/watchdogs/0 First watchdog device
213 = /dev/watchdogs/1 Second watchdog device
228 = /dev/hpet HPET driver
229 = /dev/fuse Fuse (virtual filesystem in user-space)
230 = /dev/midishare MidiShare driver
+ 231 = /dev/snapshot System memory snapshot device
+ 232 = /dev/kvm Kernel-based virtual machine (hardware virtualization extensions)
+ 233 = /dev/kmview View-OS A process with a view
+ 234 = /dev/btrfs-control Btrfs control device
+ 235 = /dev/autofs Autofs control device
240-254 Reserved for local use
255 Reserved for MISC_DYNAMIC_MINOR
The device names specified are proposed -- if there
are "standard" names for these devices, please let me know.
- 12 block MSCDEX CD-ROM callback support {2.6}
- 0 = /dev/dos_cd0 First MSCDEX CD-ROM
- 1 = /dev/dos_cd1 Second MSCDEX CD-ROM
- ...
+ 12 block
13 char Input core
0 = /dev/input/js0 First joystick
2 = /dev/midi00 First MIDI port
3 = /dev/dsp Digital audio
4 = /dev/audio Sun-compatible digital audio
- 6 = /dev/sndstat Sound card status information {2.6}
+ 6 =
7 = /dev/audioctl SPARC audio control device
8 = /dev/sequencer2 Sequencer -- alternate device
16 = /dev/mixer1 Second soundcard mixer control
33 = /dev/patmgr1 Sequencer patch manager
34 = /dev/midi02 Third MIDI port
50 = /dev/midi03 Fourth MIDI port
- 14 block BIOS harddrive callback support {2.6}
- 0 = /dev/dos_hda First BIOS harddrive whole disk
- 64 = /dev/dos_hdb Second BIOS harddrive whole disk
- 128 = /dev/dos_hdc Third BIOS harddrive whole disk
- 192 = /dev/dos_hdd Fourth BIOS harddrive whole disk
- Partitions are handled in the same way as IDE disks
- (see major number 3).
+ 14 block
15 char Joystick
0 = /dev/js0 First analog joystick
16 char Non-SCSI scanners
0 = /dev/gs4500 Genius 4500 handheld scanner
+
16 block GoldStar CD-ROM
0 = /dev/gscd GoldStar CD-ROM
- 17 char Chase serial card
+ 17 char OBSOLETE (was Chase serial card)
0 = /dev/ttyH0 First Chase port
1 = /dev/ttyH1 Second Chase port
...
17 block Optics Storage CD-ROM
0 = /dev/optcd Optics Storage CD-ROM
- 18 char Chase serial card - alternate devices
+ 18 char OBSOLETE (was Chase serial card - alternate devices)
0 = /dev/cuh0 Callout device for ttyH0
1 = /dev/cuh1 Callout device for ttyH1
...
0 = /dev/ttyC0 First Cyclades port
...
31 = /dev/ttyC31 32nd Cyclades port
+
19 block "Double" compressed disk
0 = /dev/double0 First compressed disk
...
0 = /dev/cub0 Callout device for ttyC0
...
31 = /dev/cub31 Callout device for ttyC31
+
20 block Hitachi CD-ROM (under development)
0 = /dev/hitcd Hitachi CD-ROM
This device is used on the ARM-based Acorn RiscPC.
Partitions are handled the same way as for IDE disks
- (see major number 3).
+ (see major number 3).
22 char Digiboard serial card
0 = /dev/ttyD0 First Digiboard port
22 block Second IDE hard disk/CD-ROM interface
0 = /dev/hdc Master: whole disk (or CD-ROM)
64 = /dev/hdd Slave: whole disk (or CD-ROM)
-
+
Partitions are handled the same way as for the first
interface (see major number 3).
2 = /dev/sbpcd2 Panasonic CD-ROM controller 0 unit 2
3 = /dev/sbpcd3 Panasonic CD-ROM controller 0 unit 3
- 26 char Quanta WinVision frame grabber {2.6}
- 0 = /dev/wvisfgrab Quanta WinVision frame grabber
+ 26 char
+
26 block Second Matsushita (Panasonic/SoundBlaster) CD-ROM
0 = /dev/sbpcd4 Panasonic CD-ROM controller 1 unit 0
1 = /dev/sbpcd5 Panasonic CD-ROM controller 1 unit 1
37 = /dev/nrawqft1 Unit 1, no rewind-on-close, no file marks
38 = /dev/nrawqft2 Unit 2, no rewind-on-close, no file marks
39 = /dev/nrawqft3 Unit 3, no rewind-on-close, no file marks
+
27 block Third Matsushita (Panasonic/SoundBlaster) CD-ROM
0 = /dev/sbpcd8 Panasonic CD-ROM controller 2 unit 0
1 = /dev/sbpcd9 Panasonic CD-ROM controller 2 unit 1
1 = /dev/staliomem1 Second Stallion card I/O memory
2 = /dev/staliomem2 Third Stallion card I/O memory
3 = /dev/staliomem3 Fourth Stallion card I/O memory
+
28 char Atari SLM ACSI laser printer (68k/Atari)
0 = /dev/slm0 First SLM laser printer
1 = /dev/slm1 Second SLM laser printer
1 = /dev/sbpcd13 Panasonic CD-ROM controller 3 unit 1
2 = /dev/sbpcd14 Panasonic CD-ROM controller 3 unit 2
3 = /dev/sbpcd15 Panasonic CD-ROM controller 3 unit 3
+
28 block ACSI disk (68k/Atari)
0 = /dev/ada First ACSI disk whole disk
16 = /dev/adb Second ACSI disk whole disk
31 char MPU-401 MIDI
0 = /dev/mpu401data MPU-401 data port
1 = /dev/mpu401stat MPU-401 status port
+
31 block ROM/flash memory card
0 = /dev/rom0 First ROM card (rw)
...
34 block Fourth IDE hard disk/CD-ROM interface
0 = /dev/hdg Master: whole disk (or CD-ROM)
64 = /dev/hdh Slave: whole disk (or CD-ROM)
-
+
Partitions are handled the same way as for the first
interface (see major number 3).
129 = /dev/smpte1 Second MIDI port, SMPTE timed
130 = /dev/smpte2 Third MIDI port, SMPTE timed
131 = /dev/smpte3 Fourth MIDI port, SMPTE timed
+
35 block Slow memory ramdisk
0 = /dev/slram Slow memory ramdisk
16 = /dev/tap0 First Ethertap device
...
31 = /dev/tap15 16th Ethertap device
+
36 block MCA ESDI hard disk
0 = /dev/eda First ESDI disk whole disk
64 = /dev/edb Second ESDI disk whole disk
and "user level packet I/O." This board is also
accessible as a standard networking "eth" device.
- 38 block Reserved for Linux/AP+
+ 38 block OBSOLETE (was Linux/AP+)
39 char ML-16P experimental I/O board
0 = /dev/ml16pa-a0 First card, first analog channel
50 = /dev/ml16pb-c1 Second card, second counter/timer
51 = /dev/ml16pb-c2 Second card, third counter/timer
...
- 39 block Reserved for Linux/AP+
+ 39 block
- 40 char Matrox Meteor frame grabber {2.6}
- 0 = /dev/mmetfgrab Matrox Meteor frame grabber
- 40 block Syquest EZ135 parallel port removable drive
- 0 = /dev/eza Parallel EZ135 drive, whole disk
+ 40 char
- This device is obsolete and will be removed in a
- future version of Linux. It has been replaced with
- the parallel port IDE disk driver at major number 45.
- Partitions are handled in the same way as IDE disks
- (see major number 3).
+ 40 block
41 char Yet Another Micro Monitor
0 = /dev/yamm Yet Another Micro Monitor
- 41 block MicroSolutions BackPack parallel port CD-ROM
- 0 = /dev/bpcd BackPack CD-ROM
- This device is obsolete and will be removed in a
- future version of Linux. It has been replaced with
- the parallel port ATAPI CD-ROM driver at major number 46.
+ 41 block
42 char Demo/sample use
+
42 block Demo/sample use
This number is intended for use in sample code, as
0 = /dev/ttyI0 First virtual modem
...
63 = /dev/ttyI63 64th virtual modem
+
43 block Network block devices
0 = /dev/nb0 First network block device
1 = /dev/nb1 Second network block device
0 = /dev/cui0 Callout device for ttyI0
...
63 = /dev/cui63 Callout device for ttyI63
+
44 block Flash Translation Layer (FTL) filesystems
0 = /dev/ftla FTL on first Memory Technology Device
16 = /dev/ftlb FTL on second Memory Technology Device
32 = /dev/ftlc FTL on third Memory Technology Device
...
- 240 = /dev/ftlp FTL on 16th Memory Technology Device
+ 240 = /dev/ftlp FTL on 16th Memory Technology Device
Partitions are handled in the same way as for IDE
- disks (see major number 3) expect that the partition
+ disks (see major number 3) except that the partition
limit is 15 rather than 63 per disk (same as SCSI.)
45 char isdn4linux ISDN BRI driver
191 = /dev/ippp63 64th SyncPPP device
255 = /dev/isdninfo ISDN monitor interface
+
45 block Parallel port IDE disk devices
0 = /dev/pda First parallel port IDE disk
16 = /dev/pdb Second parallel port IDE disk
1 = /dev/dcbri1 Second DataComm card
2 = /dev/dcbri2 Third DataComm card
3 = /dev/dcbri3 Fourth DataComm card
+
52 block Mylex DAC960 PCI RAID controller; fifth controller
0 = /dev/rd/c4d0 First disk, whole disk
8 = /dev/rd/c4d1 Second disk, whole disk
55 char DSP56001 digital signal processor
0 = /dev/dsp56k First DSP56001
- 55 block Mylex DAC960 PCI RAID controller; eigth controller
+
+ 55 block Mylex DAC960 PCI RAID controller; eighth controller
0 = /dev/rd/c7d0 First disk, whole disk
8 = /dev/rd/c7d1 Second disk, whole disk
...
0 = /dev/cup0 Callout device for ttyP0
1 = /dev/cup1 Callout device for ttyP1
...
+
58 block Reserved for logical volume manager
59 char sf firewall package
NAMING CONFLICT -- PROPOSED REVISED NAME /dev/rpda0 etc
60-63 char LOCAL/EXPERIMENTAL USE
+
60-63 block LOCAL/EXPERIMENTAL USE
Allocated for local/experimental use. For devices not
assigned official numbers, these ranges should be
The filename of the encrypted container and the passwords
are sent via ioctls (using the sdmount tool) to the master
node which then activates them via one of the
- /dev/scramdisk/x nodes for loopback mounting (all handled
+ /dev/scramdisk/x nodes for loop mounting (all handled
through the sdmount tool).
Requested by: andy@scramdisklinux.org
DAC960 (see major number 48) except that the limit on
partitions is 15.
-
78 char PAM Software's multimodem boards
0 = /dev/ttyM0 First PAM modem
1 = /dev/ttyM1 Second PAM modem
DAC960 (see major number 48) except that the limit on
partitions is 15.
-
79 char PAM Software's multimodem boards - alternate devices
0 = /dev/cum0 Callout device for ttyM0
1 = /dev/cum1 Callout device for ttyM1
...
- 79 block Compaq Intelligent Drive Array, eigth controller
+ 79 block Compaq Intelligent Drive Array, eighth controller
0 = /dev/ida/c7d0 First logical drive whole disk
16 = /dev/ida/c7d1 Second logical drive whole disk
...
DAC960 (see major number 48) except that the limit on
partitions is 15.
-
80 char Photometrics AT200 CCD camera
0 = /dev/at200 Photometrics AT200 CCD camera
disks (see major number 3) except that the limit on
partitions is 15.
- 93 char IBM Smart Capture Card frame grabber {2.6}
- 0 = /dev/iscc0 First Smart Capture Card
- 1 = /dev/iscc1 Second Smart Capture Card
- ...
- 128 = /dev/isccctl0 First Smart Capture Card control
- 129 = /dev/isccctl1 Second Smart Capture Card control
- ...
+ 93 char
93 block NAND Flash Translation Layer filesystem
0 = /dev/nftla First NFTL layer
...
240 = /dev/nftlp 16th NTFL layer
- 94 char miroVIDEO DC10/30 capture/playback device {2.6}
- 0 = /dev/dcxx0 First capture card
- 1 = /dev/dcxx1 Second capture card
- ...
+ 94 char
- 94 block IBM S/390 DASD block storage
+ 94 block IBM S/390 DASD block storage
0 = /dev/dasda First DASD device, major
1 = /dev/dasda1 First DASD device, block 1
2 = /dev/dasda2 First DASD device, block 2
1 = /dev/ipnat NAT control device/log file
2 = /dev/ipstate State information log file
3 = /dev/ipauth Authentication control device/log file
- ...
+ ...
96 char Parallel port ATAPI tape devices
0 = /dev/pt0 First parallel port ATAPI tape
129 = /dev/npt1 Second p.p. ATAPI tape, no rewind
...
- 96 block Inverse NAND Flash Translation Layer
+ 96 block Inverse NAND Flash Translation Layer
0 = /dev/inftla First INFTL layer
16 = /dev/inftlb Second INFTL layer
...
These devices support the same API as the generic SCSI
devices.
- 97 block Packet writing for CD/DVD devices
- 0 = /dev/pktcdvd0 First packet-writing module
- 1 = /dev/pktcdvd1 Second packet-writing module
- ...
-
98 char Control and Measurement Device (comedi)
0 = /dev/comedi0 First comedi device
1 = /dev/comedi1 Second comedi device
...
15 = /dev/amiraid/ar?p15 15th partition
-102 char Philips SAA5249 Teletext signal decoder {2.6}
- 0 = /dev/tlk0 First Teletext decoder
- 1 = /dev/tlk1 Second Teletext decoder
- 2 = /dev/tlk2 Third Teletext decoder
- 3 = /dev/tlk3 Fourth Teletext decoder
+102 char
102 block Compressed block device
0 = /dev/cbd/a First compressed block device, whole device
DAC960 (see major number 48) except that the limit on
partitions is 15.
-111 char Philips SAA7146-based audio/video card {2.6}
- 0 = /dev/av0 First A/V card
- 1 = /dev/av1 Second A/V card
- ...
+111 char
-111 block Compaq Next Generation Drive Array, eigth controller
+111 block Compaq Next Generation Drive Array, eighth controller
0 = /dev/cciss/c7d0 First logical drive, whole disk
16 = /dev/cciss/c7d1 Second logical drive, whole disk
...
...
113 block IBM iSeries virtual CD-ROM
-
0 = /dev/iseries/vcda First virtual CD-ROM
1 = /dev/iseries/vcdb Second virtual CD-ROM
...
116 char Advanced Linux Sound Driver (ALSA)
116 block MicroMemory battery backed RAM adapter (NVRAM)
- Supports 16 boards, 15 paritions each.
+ Supports 16 boards, 15 partitions each.
Requested by neilb at cse.unsw.edu.au.
0 = /dev/umem/d0 Whole of first board
...
120-127 char LOCAL/EXPERIMENTAL USE
+
120-127 block LOCAL/EXPERIMENTAL USE
Allocated for local/experimental use. For devices not
assigned official numbers, these ranges should be
nodes; instead they should be accessed through the
/dev/ptmx cloning interface.
-
128 block SCSI disk devices (128-143)
0 = /dev/sddy 129th SCSI disk whole disk
16 = /dev/sddz 130th SCSI disk whole disk
disks (see major number 3) except that the limit on
partitions is 15.
-
129 block SCSI disk devices (144-159)
0 = /dev/sdeo 145th SCSI disk whole disk
16 = /dev/sdep 146th SCSI disk whole disk
disks (see major number 3) except that the limit on
partitions is 15.
-
132 block SCSI disk devices (192-207)
0 = /dev/sdgk 193rd SCSI disk whole disk
16 = /dev/sdgl 194th SCSI disk whole disk
disks (see major number 3) except that the limit on
partitions is 15.
-
133 block SCSI disk devices (208-223)
0 = /dev/sdha 209th SCSI disk whole disk
16 = /dev/sdhb 210th SCSI disk whole disk
disks (see major number 3) except that the limit on
partitions is 15.
-
134 block SCSI disk devices (224-239)
0 = /dev/sdhq 225th SCSI disk whole disk
16 = /dev/sdhr 226th SCSI disk whole disk
disks (see major number 3) except that the limit on
partitions is 15.
-
135 block SCSI disk devices (240-255)
0 = /dev/sdig 241st SCSI disk whole disk
16 = /dev/sdih 242nd SCSI disk whole disk
disks (see major number 3) except that the limit on
partitions is 15.
-
136-143 char Unix98 PTY slaves
0 = /dev/pts/0 First Unix98 pseudo-TTY
- 1 = /dev/pts/1 Second Unix98 pesudo-TTY
+ 1 = /dev/pts/1 Second Unix98 pseudo-TTY
...
These device nodes are automatically generated with
...
159 char RESERVED
+
159 block RESERVED
160 char General Purpose Instrument Bus (GPIB)
Partitions are handled in the same way as for IDE
disks (see major number 3) except that the limit on
- partitions is 31.
+ partitions is 31.
162 char Raw block device interface
0 = /dev/rawctl Raw I/O control device
2 = /dev/raw/raw2 Second raw I/O device
...
-163 char UNASSIGNED (was Radio Tech BIM-XXX-RS232 radio modem - see 51)
+163 char
164 char Chase Research AT/PCI-Fast serial card
0 = /dev/ttyCH0 AT/PCI-Fast board 0, port 0
171 char Reserved for IEEE 1394 (Firewire)
-
172 char Moxa Intellio serial card
0 = /dev/ttyMX0 First Moxa port
1 = /dev/ttyMX1 Second Moxa port
1 = /dev/clanvi1 Second cLAN adapter
...
+179 block MMC block devices
+ 0 = /dev/mmcblk0 First SD/MMC card
+ 1 = /dev/mmcblk0p1 First partition on first MMC card
+ 8 = /dev/mmcblk1 Second SD/MMC card
+ ...
+
179 char CCube DVXChip-based PCI products
0 = /dev/dvxirq0 First DVX device
1 = /dev/dvxirq1 Second DVX device
0 = /dev/usb/lp0 First USB printer
...
15 = /dev/usb/lp15 16th USB printer
- 16 = /dev/usb/mouse0 First USB mouse
- ...
- 31 = /dev/usb/mouse15 16th USB mouse
- 32 = /dev/usb/ez0 First USB firmware loader
- ...
- 47 = /dev/usb/ez15 16th USB firmware loader
48 = /dev/usb/scanner0 First USB scanner
...
63 = /dev/usb/scanner15 16th USB scanner
64 = /dev/usb/rio500 Diamond Rio 500
65 = /dev/usb/usblcd USBLCD Interface (info@usblcd.de)
66 = /dev/usb/cpad0 Synaptics cPad (mouse/LCD)
+ 96 = /dev/usb/hiddev0 1st USB HID device
+ ...
+ 111 = /dev/usb/hiddev15 16th USB HID device
+ 112 = /dev/usb/auer0 1st auerswald ISDN device
+ ...
+ 127 = /dev/usb/auer15 16th auerswald ISDN device
+ 128 = /dev/usb/brlvgr0 First Braille Voyager device
+ ...
+ 131 = /dev/usb/brlvgr3 Fourth Braille Voyager device
+ 132 = /dev/usb/idmouse ID Mouse (fingerprint scanner) device
+ 133 = /dev/usb/sisusbvga1 First SiSUSB VGA device
+ ...
+ 140 = /dev/usb/sisusbvga8 Eighth SISUSB VGA device
+ 144 = /dev/usb/lcd USB LCD device
+ 160 = /dev/usb/legousbtower0 1st USB Legotower device
+ ...
+ 175 = /dev/usb/legousbtower15 16th USB Legotower device
+ 176 = /dev/usb/usbtmc1 First USB TMC device
+ ...
+ 192 = /dev/usb/usbtmc16 16th USB TMC device
+ 240 = /dev/usb/dabusb0 First daubusb device
+ ...
+ 243 = /dev/usb/dabusb3 Fourth dabusb device
180 block USB block devices
- 0 = /dev/uba First USB block device
- 8 = /dev/ubb Second USB block device
- 16 = /dev/ubc Thrid USB block device
- ...
+ 0 = /dev/uba First USB block device
+ 8 = /dev/ubb Second USB block device
+ 16 = /dev/ubc Third USB block device
+ ...
181 char Conrad Electronic parallel port radio clocks
0 = /dev/pcfclock0 First Conrad radio clock
32 = /dev/mvideo/status2 Third device
...
...
- 240 = /dev/mvideo/status15 16th device
+ 240 = /dev/mvideo/status15 16th device
...
195 char Nvidia graphics devices
1 = /dev/cpu/1/msr MSRs on CPU 1
...
+202 block Xen Virtual Block Device
+ 0 = /dev/xvda First Xen VBD whole disk
+ 16 = /dev/xvdb Second Xen VBD whole disk
+ 32 = /dev/xvdc Third Xen VBD whole disk
+ ...
+ 240 = /dev/xvdp Sixteenth Xen VBD whole disk
+
+ Partitions are handled in the same way as for IDE
+ disks (see major number 3) except that the limit on
+ partitions is 15.
+
203 char CPU CPUID information
0 = /dev/cpu/0/cpuid CPUID on CPU 0
1 = /dev/cpu/1/cpuid CPUID on CPU 1
46 = /dev/ttyCPM0 PPC CPM (SCC or SMC) - port 0
...
47 = /dev/ttyCPM5 PPC CPM (SCC or SMC) - port 5
- 50 = /dev/ttyIOC40 Altix serial card
+ 50 = /dev/ttyIOC0 Altix serial card
+ ...
+ 81 = /dev/ttyIOC31 Altix serial card
+ 82 = /dev/ttyVR0 NEC VR4100 series SIU
+ 83 = /dev/ttyVR1 NEC VR4100 series DSIU
+ 84 = /dev/ttyIOC84 Altix ioc4 serial card
+ ...
+ 115 = /dev/ttyIOC115 Altix ioc4 serial card
+ 116 = /dev/ttySIOC0 Altix ioc3 serial card
+ ...
+ 147 = /dev/ttySIOC31 Altix ioc3 serial card
+ 148 = /dev/ttyPSC0 PPC PSC - port 0
+ ...
+ 153 = /dev/ttyPSC5 PPC PSC - port 5
+ 154 = /dev/ttyAT0 ATMEL serial port 0
+ ...
+ 169 = /dev/ttyAT15 ATMEL serial port 15
+ 170 = /dev/ttyNX0 Hilscher netX serial port 0
+ ...
+ 185 = /dev/ttyNX15 Hilscher netX serial port 15
+ 186 = /dev/ttyJ0 JTAG1 DCC protocol based serial port emulation
+ 187 = /dev/ttyUL0 Xilinx uartlite - port 0
+ ...
+ 190 = /dev/ttyUL3 Xilinx uartlite - port 3
+ 191 = /dev/xvc0 Xen virtual console - port 0
+ 192 = /dev/ttyPZ0 pmac_zilog - port 0
...
- 81 = /dev/ttyIOC431 Altix serial card
- 82 = /dev/ttyVR0 NEC VR4100 series SIU
- 83 = /dev/ttyVR1 NEC VR4100 series DSIU
+ 195 = /dev/ttyPZ3 pmac_zilog - port 3
+ 196 = /dev/ttyTX0 TX39/49 serial port 0
+ ...
+ 204 = /dev/ttyTX7 TX39/49 serial port 7
+ 205 = /dev/ttySC0 SC26xx serial port 0
+ 206 = /dev/ttySC1 SC26xx serial port 1
+ 207 = /dev/ttySC2 SC26xx serial port 2
+ 208 = /dev/ttySC3 SC26xx serial port 3
+ 209 = /dev/ttyMAX0 MAX3100 serial port 0
+ 210 = /dev/ttyMAX1 MAX3100 serial port 1
+ 211 = /dev/ttyMAX2 MAX3100 serial port 2
+ 212 = /dev/ttyMAX3 MAX3100 serial port 3
205 char Low-density serial ports (alternate device)
0 = /dev/culu0 Callout device for ttyLU0
50 = /dev/cuioc40 Callout device for ttyIOC40
...
81 = /dev/cuioc431 Callout device for ttyIOC431
- 82 = /dev/cuvr0 Callout device for ttyVR0
- 83 = /dev/cuvr1 Callout device for ttyVR1
-
+ 82 = /dev/cuvr0 Callout device for ttyVR0
+ 83 = /dev/cuvr1 Callout device for ttyVR1
206 char OnStream SC-x0 tape devices
0 = /dev/osst0 First OnStream SCSI tape, mode 0
...
212 char LinuxTV.org DVB driver subsystem
-
0 = /dev/dvb/adapter0/video0 first video decoder of first card
1 = /dev/dvb/adapter0/audio0 first audio decoder of first card
2 = /dev/dvb/adapter0/sec0 (obsolete/unused)
...
196 = /dev/dvb/adapter3/video0 first video decoder of fourth card
-
-216 char USB BlueTooth devices
- 0 = /dev/ttyUB0 First USB BlueTooth device
- 1 = /dev/ttyUB1 Second USB BlueTooth device
+216 char Bluetooth RFCOMM TTY devices
+ 0 = /dev/rfcomm0 First Bluetooth RFCOMM TTY device
+ 1 = /dev/rfcomm1 Second Bluetooth RFCOMM TTY device
...
-217 char USB BlueTooth devices (alternate devices)
- 0 = /dev/cuub0 Callout device for ttyUB0
- 1 = /dev/cuub1 Callout device for ttyUB1
+217 char Bluetooth RFCOMM TTY devices (alternate devices)
+ 0 = /dev/curf0 Callout device for rfcomm0
+ 1 = /dev/curf1 Callout device for rfcomm1
...
218 char The Logical Company bus Unibus/Qbus adapters
2 = /dev/3270/tub2 Second 3270 terminal
...
-229 char IBM iSeries virtual console
- 0 = /dev/iseries/vtty0 First console port
- 1 = /dev/iseries/vtty1 Second console port
+229 char IBM iSeries/pSeries virtual console
+ 0 = /dev/hvc0 First console port
+ 1 = /dev/hvc1 Second console port
...
230 char IBM iSeries virtual tape
ioctl()'s can be used to rewind the tape regardless of
the device used to access it.
-231 char InfiniBand MAD
+231 char InfiniBand
0 = /dev/infiniband/umad0
1 = /dev/infiniband/umad1
- ...
+ ...
+ 63 = /dev/infiniband/umad63 63rd InfiniBandMad device
+ 64 = /dev/infiniband/issm0 First InfiniBand IsSM device
+ 65 = /dev/infiniband/issm1 Second InfiniBand IsSM device
+ ...
+ 127 = /dev/infiniband/issm63 63rd InfiniBand IsSM device
+ 128 = /dev/infiniband/uverbs0 First InfiniBand verbs device
+ 129 = /dev/infiniband/uverbs1 Second InfiniBand verbs device
+ ...
+ 159 = /dev/infiniband/uverbs31 31st InfiniBand verbs device
+
+232 char Biometric Devices
+ 0 = /dev/biometric/sensor0/fingerprint first fingerprint sensor on first device
+ 1 = /dev/biometric/sensor0/iris first iris sensor on first device
+ 2 = /dev/biometric/sensor0/retina first retina sensor on first device
+ 3 = /dev/biometric/sensor0/voiceprint first voiceprint sensor on first device
+ 4 = /dev/biometric/sensor0/facial first facial sensor on first device
+ 5 = /dev/biometric/sensor0/hand first hand sensor on first device
+ ...
+ 10 = /dev/biometric/sensor1/fingerprint first fingerprint sensor on second device
+ ...
+ 20 = /dev/biometric/sensor2/fingerprint first fingerprint sensor on third device
+ ...
+
+233 char PathScale InfiniPath interconnect
+ 0 = /dev/ipath Primary device for programs (any unit)
+ 1 = /dev/ipath0 Access specifically to unit 0
+ 2 = /dev/ipath1 Access specifically to unit 1
+ ...
+ 4 = /dev/ipath3 Access specifically to unit 3
+ 129 = /dev/ipath_sma Device used by Subnet Management Agent
+ 130 = /dev/ipath_diag Device used by diagnostics programs
-232-239 UNASSIGNED
+234-239 UNASSIGNED
240-254 char LOCAL/EXPERIMENTAL USE
+
240-254 block LOCAL/EXPERIMENTAL USE
Allocated for local/experimental use. For devices not
assigned official numbers, these ranges should be
used in order to avoid conflicting with future assignments.
255 char RESERVED
+
255 block RESERVED
This major is reserved to assist the expansion to a
larger number space. No device nodes with this major
should ever be created on the filesystem.
+ (This is probably not true anymore, but I'll leave it
+ for now /Torben)
+
+---LARGE MAJORS!!!!!---
+
+256 char Equinox SST multi-port serial boards
+ 0 = /dev/ttyEQ0 First serial port on first Equinox SST board
+ 127 = /dev/ttyEQ127 Last serial port on first Equinox SST board
+ 128 = /dev/ttyEQ128 First serial port on second Equinox SST board
+ ...
+ 1027 = /dev/ttyEQ1027 Last serial port on eighth Equinox SST board
+
+256 block Resident Flash Disk Flash Translation Layer
+ 0 = /dev/rfda First RFD FTL layer
+ 16 = /dev/rfdb Second RFD FTL layer
+ ...
+ 240 = /dev/rfdp 16th RFD FTL layer
+
+257 char Phoenix Technologies Cryptographic Services Driver
+ 0 = /dev/ptlsec Crypto Services Driver
+
+257 block SSFDC Flash Translation Layer filesystem
+ 0 = /dev/ssfdca First SSFDC layer
+ 8 = /dev/ssfdcb Second SSFDC layer
+ 16 = /dev/ssfdcc Third SSFDC layer
+ 24 = /dev/ssfdcd 4th SSFDC layer
+ 32 = /dev/ssfdce 5th SSFDC layer
+ 40 = /dev/ssfdcf 6th SSFDC layer
+ 48 = /dev/ssfdcg 7th SSFDC layer
+ 56 = /dev/ssfdch 8th SSFDC layer
+
+258 block ROM/Flash read-only translation layer
+ 0 = /dev/blockrom0 First ROM card's translation layer interface
+ 1 = /dev/blockrom1 Second ROM card's translation layer interface
+ ...
+
+259 block Block Extended Major
+ Used dynamically to hold additional partition minor
+ numbers and allow large numbers of partitions per device
+
+259 char FPGA configuration interfaces
+ 0 = /dev/icap0 First Xilinx internal configuration
+ 1 = /dev/icap1 Second Xilinx internal configuration
+
+260 char OSD (Object-based-device) SCSI Device
+ 0 = /dev/osd0 First OSD Device
+ 1 = /dev/osd1 Second OSD Device
+ ...
+ 255 = /dev/osd255 256th OSD Device
**** ADDITIONAL /dev DIRECTORY ENTRIES
pseudoterminals (PTYs).
All terminal devices share a common set of capabilities known as line
-diciplines; these include the common terminal line dicipline as well
+disciplines; these include the common terminal line discipline as well
as SLIP and PPP modes.
All terminal devices are named similarly; this section explains the
Pseudoterminals (PTYs)
Pseudoterminals, or PTYs, are used to create login sessions or provide
-other capabilities requiring a TTY line dicipline (including SLIP or
+other capabilities requiring a TTY line discipline (including SLIP or
PPP capability) to arbitrary data-generation processes. Each PTY has
a master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named
/dev/tty[p-za-e][0-9a-f]. The kernel arbitrates the use of PTYs by
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff