Manual Pages  — DISKTAB

#include <disklabel.h>

Disktab is a simple database which describes disk geometries and disk partition characteristics. It is used to initialize the disk label on the disk. The format is patterned after the termcap(5) terminal data base. Entries in disktab consist of a number of `:'-separated fields. The first field for each entry gives the names by which a disk's entry may be selected, separated by `|' characters. The last name given should be a long name fully identifying the disk.

The optional fields for each entry are:

ID Ta Type	Description
amp;ty Ta str	Type of disk (e.g. removable, winchester)
amp;dt Ta str	Type of controller (e.g. SMD, ESDI, floppy)
amp;ns Ta num	Number of sectors per track
amp;nt Ta num	Number of tracks per cylinder
amp;nc Ta num	Total number of cylinders on the disk
amp;sc Ta num	Number of sectors per cylinder, ns*nt default
amp;su Ta num	Number of sectors per unit, sc*nc default
amp;se Ta num	Sector size in bytes, DEV_BSIZE default
amp;sf Ta bool	Controller supports bad144-style bad sector forwarding
amp;rm Ta num	Rotation speed, rpm, 3600 default
amp;sk Ta num	Sector skew per track, default 0
amp;cs Ta num	Sector skew per cylinder, default 0
amp;hs Ta num	Headswitch time, usec, default 0
amp;ts Ta num	One-cylinder seek time, usec, default 0
amp;il Ta num	Sector interleave (n:1), 1 default
amp;d[0-4] Ta num	Drive-type-dependent parameters
amp;bs Ta num	Boot block size, default BBSIZE
amp;sb Ta num	Superblock size, default 0
amp;ba Ta num	Block size for partition `a' (bytes)
amp;bd Ta num	Block size for partition `d' (bytes)
amp;be Ta num	Block size for partition `e' (bytes)
amp;bf Ta num	Block size for partition `f' (bytes)
amp;bg Ta num	Block size for partition `g' (bytes)
amp;bh Ta num	Block size for partition `h' (bytes)
amp;fa Ta num	Fragment size for partition `a' (bytes)
amp;fd Ta num	Fragment size for partition `d' (bytes)
amp;fe Ta num	Fragment size for partition `e' (bytes)
amp;ff Ta num	Fragment size for partition `f' (bytes)
amp;fg Ta num	Fragment size for partition `g' (bytes)
amp;fh Ta num	Fragment size for partition `h' (bytes)
amp;oa Ta num	Offset of partition `a' in sectors
amp;ob Ta num	Offset of partition `b' in sectors
amp;oc Ta num	Offset of partition `c' in sectors
amp;od Ta num	Offset of partition `d' in sectors
amp;oe Ta num	Offset of partition `e' in sectors
amp;of Ta num	Offset of partition `f' in sectors
amp;og Ta num	Offset of partition `g' in sectors
amp;oh Ta num	Offset of partition `h' in sectors
amp;pa Ta num	Size of partition `a' in sectors
amp;pb Ta num	Size of partition `b' in sectors
amp;pc Ta num	Size of partition `c' in sectors
amp;pd Ta num	Size of partition `d' in sectors
amp;pe Ta num	Size of partition `e' in sectors
amp;pf Ta num	Size of partition `f' in sectors
amp;pg Ta num	Size of partition `g' in sectors
amp;ph Ta num	Size of partition `h' in sectors
amp;ta Ta str	Partition type of partition `a'( Bx 4.2 file system, swap, etc)
amp;tb Ta str	Partition type of partition `b'
amp;tc Ta str	Partition type of partition `c'
amp;td Ta str	Partition type of partition `d'
amp;te Ta str	Partition type of partition `e'
amp;tf Ta str	Partition type of partition `f'
amp;tg Ta str	Partition type of partition `g'
amp;th Ta str	Partition type of partition `h'

getdiskbyname(3), bsdlabel(8), newfs(8)