Series 300, 800 Only

NAME

disktab − disk description file

SYNOPSIS

#include <disktab.h>

DESCRIPTION

Disktab is a simple data base which describes disk geometries and disk section characteristics.  Entries in disktab consist of a number of ‘:’ separated fields.  The first entry for each disk gives the names which are known for the disk, separated by ‘|’ 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. 

 NameType Description
nsnumNumber of sectors per track
ntnumNumber of tracks per cylinder
ncnumTotal number of cylinders on the disk
b0numBlock size for section ‘0’ (bytes)
b1numBlock size for section ‘1’ (bytes)
b<n>numBlock size for section ‘<n>’ (bytes)
f0numFragment size for section ‘0’ (bytes)
f1numFragment size for section ‘1’ (bytes)
f<n>numFragment size for section ‘<n>’ (bytes)
s0numSize of section ‘0’ in sectors
s1numSize of section ‘1’ in sectors
s<n>numSize of section ‘<n>’ in sectors
rmnumRevolution per minute
tystrType 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

The HFS file system is implemented on Series 300 and Series 800. 

Series 300
There is only one section per disk drive.

FILES

/etc/disktab

AUTHOR

Disktab was developed by the Hewlett-Packard Company, and the University of California, Berkeley California, Computer Science Division, Department of Electrical Engineering and Computer Science. 

SEE ALSO

newfs(1M)

Hewlett-Packard Company  —  Version B.1,  May 11, 2021