disktab(4)
NAME
disktab − disk description file
SYNOPSIS
#include <disktab.h>
DESCRIPTION
disktab is a simple database that describes disk geometries and disk section characteristics. Entries in disktab consist of a number of colon-separated fields. The first entry for each disk gives the names by which the disk is known, separated by vertical bar (|) characters. The last name given should be a long name fully identifying the disk.
The following list indicates the normal values stored for each disk entry. Sectors are of size DEV_BSIZE, defined in <sys/param.h> on your system.
| Name | Type | Description |
| ns | num | Number of sectors per track |
| nt | num | Number of tracks per cylinder |
| nc | num | Total number of cylinders on the disk |
| b0 | num | Block size for section ‘0’ (bytes) |
| b1 | num | Block size for section ‘1’ (bytes) |
| b<n> | num | Block size for section ‘<n>’ (bytes) |
| f0 | num | Fragment size for section ‘0’ (bytes) |
| f1 | num | Fragment size for section ‘1’ (bytes) |
| f<n> | num | Fragment size for section ‘<n>’ (bytes) |
| s0 | num | Size of section ‘0’ in sectors |
| s1 | num | Size of section ‘1’ in sectors |
| s<n> | num | Size of section ‘<n>’ in sectors |
| rm | num | Revolution per minute |
| ty | str | Type of disk (e.g. removable, winchester) |
Example:
hp7914::ty=winchester:ns#16:nt#7:nc#1061:s0#118832\ :b0#8192:f0#1024:rm#3600:
DEPENDENCIES
Series 300/400/700:
There is only one section per disk drive.
FILES
/etc/disktab
AUTHOR
disktab was developed by HP and the University of California, Berkeley.
SEE ALSO
Hewlett-Packard Company — HP-UX Release 8.05: June 1991