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