| blob | 4720382f07a0d1b91927304d91db52bd4621de69 |
1 .\" $NetBSD: disktab.5,v 1.10 2003/04/16 13:35:23 wiz Exp $
2 .\"
3 .\" Copyright (c) 1983, 1991, 1993
4 .\" The Regents of the University of California. All rights reserved.
5 .\"
6 .\" Redistribution and use in source and binary forms, with or without
7 .\" modification, are permitted provided that the following conditions
8 .\" are met:
9 .\" 1. Redistributions of source code must retain the above copyright
10 .\" notice, this list of conditions and the following disclaimer.
11 .\" 2. Redistributions in binary form must reproduce the above copyright
12 .\" notice, this list of conditions and the following disclaimer in the
13 .\" documentation and/or other materials provided with the distribution.
14 .\" 3. Neither the name of the University nor the names of its contributors
15 .\" may be used to endorse or promote products derived from this software
16 .\" without specific prior written permission.
17 .\"
18 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 .\" SUCH DAMAGE.
29 .\"
30 .\" @(#)disktab.5 8.1 (Berkeley) 6/5/93
31 .\"
32 .Dd June 5, 1993
33 .Dt DISKTAB 5
34 .Os
35 .Sh NAME
36 .Nm disktab
37 .Nd disk description file
38 .Sh SYNOPSIS
39 .In disktab.h
40 .Sh DESCRIPTION
41 .Nm
42 is a simple database which describes disk geometries and
43 disk partition characteristics.
44 It is used
45 .\"by the formatter(\c
46 .\"IR.Xr format 8 )
47 .\"to determine how to format the disk, and
48 to initialize the disk label on the disk.
49 The format is patterned
50 after the
51 .Xr termcap 5
52 terminal data base. Entries in
53 .Nm
54 consist of a number of `:' separated fields. The
55 first entry for each disk gives the names which are
56 known for the disk, separated by `|' characters. The
57 last name given should be a long name fully identifying
58 the disk.
59 .Pp
60 The following list indicates the normal values
61 stored for each disk entry.
62 .Bl -column "indent" "boolx"
63 .It Sy Name Type Description
64 .It "\&ty str Type of disk (e.g. removable, winchester)"
65 .It "\&dt str Type of controller (e.g."
66 .Tn SMD , ESDI ,
67 floppy)
68 .It "\&ns num Number of sectors per track"
69 .It "\&nt num Number of tracks per cylinder"
70 .It "\&nc num Total number of cylinders on the disk"
71 .It "\&sc num Number of sectors per cylinder, ns*nt default"
72 .It "\&su num Number of sectors per unit, sc*nc default"
73 .It "\&se num Sector size in bytes,"
74 .Dv DEV_BSIZE
75 default
76 .It "\&sf bool Controller supports bad144-style bad sector forwarding"
77 .It "\&rm num Rotation speed, rpm, 3600 default"
78 .It "\&sk num Sector skew per track, default 0"
79 .It "\&cs num Sector skew per cylinder, default 0"
80 .It "\&hs num Headswitch time, usec, default 0"
81 .It "\&ts num One-cylinder seek time, usec, default 0"
82 .It "\&il num Sector interleave (n:1), 1 default"
83 .It "\&d[0-4] num Drive-type-dependent parameters"
84 .It "\&bs num Boot block size, default"
85 .Dv BBSIZE
86 .It "\&sb num Superblock size, default"
87 .Dv SBSIZE
88 .It "\&ba num Block size for partition `a' (bytes)"
89 .It "\&bd num Block size for partition `d' (bytes)"
90 .It "\&be num Block size for partition `e' (bytes)"
91 .It "\&bf num Block size for partition `f' (bytes)"
92 .It "\&bg num Block size for partition `g' (bytes)"
93 .It "\&bh num Block size for partition `h' (bytes)"
94 .It "\&fa num Fragment size for partition `a' (bytes)"
95 .It "\&fd num Fragment size for partition `d' (bytes)"
96 .It "\&fe num Fragment size for partition `e' (bytes)"
97 .It "\&ff num Fragment size for partition `f' (bytes)"
98 .It "\&fg num Fragment size for partition `g' (bytes)"
99 .It "\&fh num Fragment size for partition `h' (bytes)"
100 .It "\&oa num Offset of partition `a' in sectors"
101 .It "\&ob num Offset of partition `b' in sectors"
102 .It "\&oc num Offset of partition `c' in sectors"
103 .It "\&od num Offset of partition `d' in sectors"
104 .It "\&oe num Offset of partition `e' in sectors"
105 .It "\&of num Offset of partition `f' in sectors"
106 .It "\&og num Offset of partition `g' in sectors"
107 .It "\&oh num Offset of partition `h' in sectors"
108 .It "\&pa num Size of partition `a' in sectors"
109 .It "\&pb num Size of partition `b' in sectors"
110 .It "\&pc num Size of partition `c' in sectors"
111 .It "\&pd num Size of partition `d' in sectors"
112 .It "\&pe num Size of partition `e' in sectors"
113 .It "\&pf num Size of partition `f' in sectors"
114 .It "\&pg num Size of partition `g' in sectors"
115 .It "\&ph num Size of partition `h' in sectors"
116 .It "\&ta str Partition type of partition `a'"
117 .Pf ( Bx 4.2
118 filesystem, swap, etc)
119 .It "\&tb str Partition type of partition `b'"
120 .It "\&tc str Partition type of partition `c'"
121 .It "\&td str Partition type of partition `d'"
122 .It "\&te str Partition type of partition `e'"
123 .It "\&tf str Partition type of partition `f'"
124 .It "\&tg str Partition type of partition `g'"
125 .It "\&th str Partition type of partition `h'"
126 .El
127 .Sh FILES
128 .Bl -tag -width /etc/disktab -compact
129 .It Pa /etc/disktab
130 .El
131 .Sh SEE ALSO
132 .Xr getdiskbyname 3 ,
133 .Xr disklabel 5 ,
134 .Xr disklabel 8 ,
135 .Xr newfs 8
136 .Sh HISTORY
137 The
138 .Nm
139 description file appeared in
140 .Bx 4.2 .