Documentation/admin-guide/devices.txt

1    0		Unnamed devices (e.g. non-device mounts)
5    1 char	Memory devices
44 		These are the old-style (BSD) PTY devices; Unix98
45 		devices are on major 128 and above and use the PTY
104 		the drive type is insignificant for these devices.
112 		These are the old-style (BSD) PTY devices; Unix98
113 		devices are on major 136 and above.
131    4 char	TTY devices
141 		UART serial ports refer to 8250/16450/16550 series devices.
144 		number for BSD PTY devices.  As of Linux 2.1.115, this
147    4 block	Aliases for dynamically allocated major devices to be used
153    5 char	Alternate TTY devices
163 		the section on terminal devices for more information
166    6 char	Parallel printer devices
175    7 char	Virtual console capture devices
189 		NOTE: These devices permit both read and write access.
191    7 block	Loopback devices
196 		The loop devices are used to mount filesystems not
197 		associated with block devices.	The binding to the
198 		loop devices is handled by mount(8) or losetup(8).
200    8 block	SCSI disk devices (0-15)
211    9 char	SCSI tape devices
242    9 block	Metadisk (RAID) devices
307 		170 = /dev/thinkpad/thinkpad	IBM Thinkpad devices
391   11 block	SCSI CD-ROM devices
409 		are "standard" names for these devices, please let me know.
473   18 char	OBSOLETE (was Chase serial card - alternate devices)
489 		mirror devices.
500 		this sets an unnecessary limit of 26 SCSI devices in
523   23 char	Digiboard serial card - alternate devices
546   25 char	Stallion serial card - alternate devices
641   30 char	iBCS-2 compatibility devices
696 		The read-write (rw) devices support back-caching
698 		devices.  The read-only devices (ro) support reading
708   33 char	Specialix serial card - alternate devices
726 		In a previous version these devices were named
837   43 block	Network block devices
843 		devices: If you read from it, it sends packet across
849   44 char	isdn4linux virtual modem - alternate devices
879   45 block	Parallel port IDE disk devices
893   46 block	Parallel port ATAPI CD-ROM devices
899   47 char	Comtrol Rocketport serial card - alternate devices
903   47 block	Parallel port ATAPI disk devices
910 		devices and hence does not support partitioning.
928   49 char	SDL RISCom serial card - alternate devices
1027 		Additional devices will be added to this number, all
1049   58 char	Hayes ESP serial card - alternate devices
1064 		The pda devices are used to mount filesystems on
1075 		Allocated for local/experimental use.  For devices not
1082   64 block	Scramdisk/DriveCrypt encrypted devices
1118   65 block	SCSI disk devices (16-31)
1134   66 block	SCSI disk devices (32-47)
1150   67 block	SCSI disk devices (48-63)
1171   68 block	SCSI disk devices (64-79)
1185   69 block	SCSI disk devices (80-95)
1205   70 block	SCSI disk devices (96-111)
1234   71 block	SCSI disk devices (112-127)
1245   72 char	Computone IntelliPort II serial card - alternate devices
1273   73 char	Computone IntelliPort II serial card - control devices
1328   76 char	Specialix IO8+ serial card - alternate devices
1374   79 char	PAM Software's multimodem boards - alternate devices
1563   91 char	CAN-Bus devices
1614   96 char	Parallel port ATAPI tape devices
1634 		These devices support the same API as the generic SCSI
1635 		devices.
1749  106 char	Comtrol VS-1000 serial controller - alternate devices
1850  113 char	ISI serial card - alternate devices
1890  115 char	TI link cable devices (115 was formerly the console driver speaker)
1905 		The NWFS (NetWare) devices are used to present a
1984 		Allocated for local/experimental use.  For devices not
1990 		These devices should not have corresponding device
1994  128 block       SCSI disk devices (128-143)
2005  129 block       SCSI disk devices (144-159)
2016  130 char 	(Misc devices)
2018  130 block       SCSI disk devices (160-175)
2029  131 block       SCSI disk devices (176-191)
2040  132 block       SCSI disk devices (192-207)
2051  133 block       SCSI disk devices (208-223)
2062  134 block       SCSI disk devices (224-239)
2073  135 block       SCSI disk devices (240-255)
2223  149 char	Technology Concepts serial card - alternate devices
2275  155 char	Specialix RIO serial card - alternate devices
2285  157 char	Specialix RIO serial card - alternate devices
2319  161 char	IrCOMM devices (IrDA serial/parallel emulation)
2360  165 char	Chase Research AT/PCI-Fast serial card - alternate devices
2370  167 char	ACM USB modems - alternate devices
2399  173 char	Moxa Intellio serial card - alternate devices
2410  175 char	SmartIO serial card - alternate devices
2436  179 block       MMC block devices
2453  180 char	USB devices
2487  180 block	USB block devices
2541  189 char	USB serial converters - alternate devices
2581  195 char	Nvidia graphics devices
2759  206 char	OnStream SC-x0 tape devices
2812  209 char	User space serial ports (alternate devices)
2865  216 char	Bluetooth RFCOMM TTY devices
2870  217 char	Bluetooth RFCOMM TTY devices (alternate devices)
2912  225 char	A2232 serial card (alternate devices)
3006 		Character devices that request a dynamic allocation of major number will
3010 		Allocated for local/experimental use.  For devices not
3077 		Character devices that request a dynamic allocation of major