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[unix-history] / usr / src / share / man / man5 / disktab.5

.\" Copyright (c) 1983 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"     @(#)disktab.5   6.3 (Berkeley) %G%
.\"
.TH DISKTAB 5 ""
.UC 5
.SH NAME
disktab \- disk description file
.SH SYNOPSIS
.B #include <disktab.h>
.SH DESCRIPTION
.I Disktab
is a simple date base which describes disk geometries and
disk partition characteristics.  The format is patterned
after the
.IR termcap (5)
terminal data base.  Entries in 
.I 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. 
.PP
The following list indicates the normal values
stored for each disk entry.
.nf

.ta \w'Name  'u +\w'Type  'u
\fBName Type    Description\fP
ns      num     Number of sectors per track
nt      num     Number of tracks per cylinder
nc      num     Total number of cylinders on the disk
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)
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
se      num     Sector size in bytes
sf      bool    supports bad144-style bad sector forwarding
so      bool    partition offsets in sectors
ty      str     Type of disk (e.g. removable, winchester)
.fi
.PP
.I Disktab
entries may be automatically generated with the
.I diskpart
program.
.SH FILES
/etc/disktab
.SH "SEE ALSO"
newfs(8), diskpart(8)
.SH BUGS
This file shouldn't exist, the information should be
stored on each disk pack.