1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
.\" $OpenBSD: disktab.5,v 1.7 2000/10/26 00:37:04 aaron Exp $
.\" $NetBSD: disktab.5,v 1.4 1994/11/30 19:31:15 jtc Exp $
.\"
.\" Copyright (c) 1983, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)disktab.5 8.1 (Berkeley) 6/5/93
.\"
.Dd June 5, 1993
.Dt DISKTAB 5
.Os
.Sh NAME
.Nm disktab
.Nd disk description file
.Sh SYNOPSIS
.Fd #include <disktab.h>
.Sh DESCRIPTION
.Nm
is a simple database which describes disk geometries and
disk partition characteristics.
It is used
.\"by the formatter(\c
.\"IR.Xr format 8 )
.\"to determine how to format the disk, and
to initialize the disk label on the disk.
The format is patterned after the
.Xr termcap 5
terminal database.
Entries in
.Nm
consist of a number of colon
.Pq Ql \&:
separated fields.
The first entry for each disk gives the names which are
known for the disk, separated by
.Dq \&|
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:
.Bl -column "indent" "boolx"
.It Sy Name Type Description
.It "\&ty str Type of disk (e.g., removable, winchester)."
.It "\&dt str Type of controller (e.g.,"
.Tn SMD , ESDI ,
floppy).
.It "\&ns num Number of sectors per track."
.It "\&nt num Number of tracks per cylinder."
.It "\&nc num Total number of cylinders on the disk."
.It "\&sc num Number of sectors per cylinder (default: nc*nt)."
.It "\&su num Number of sectors per unit (default: sc*nc)."
.It "\&se num Sector size in bytes (default:"
.Dv DEV_BSIZE ) .
.It "\&sf bool Controller supports bad144-style bad sector forwarding."
.It "\&rm num Rotation speed in RPM (default: 3600)."
.It "\&sk num Sector skew per track (default: 0)."
.It "\&cs num Sector skew per cylinder (default: 0)."
.It "\&hs num Headswitch time in usec (default: 0)."
.It "\&ts num One-cylinder seek time in usec (default: 0)."
.It "\&il num Sector interleave (n:1) (default: 1)."
.It "\&d[0-4] num Drive-type-dependent parameters."
.It "\&bs num Boot block size (default:"
.Dv BBSIZE ) .
.It "\&sb num Superblock size (default: "
.Dv SBSIZE ) .
.It "\&ba num Block size for partition"
.Dq a
(bytes).
.It "\&bd num Block size for partition"
.Dq d
(bytes).
.It "\&be num Block size for partition"
.Dq e
(bytes).
.It "\&bf num Block size for partition"
.Dq f
(bytes).
.It "\&bg num Block size for partition"
.Dq g
(bytes).
.It "\&bh num Block size for partition"
.Dq h
(bytes).
.It "\&fa num Fragment size for partition"
.Dq a
(bytes).
.It "\&fd num Fragment size for partition"
.Dq d
(bytes).
.It "\&fe num Fragment size for partition"
.Dq e
(bytes).
.It "\&ff num Fragment size for partition"
.Dq f
(bytes).
.It "\&fg num Fragment size for partition"
.Dq g
(bytes).
.It "\&fh num Fragment size for partition"
.Dq h
(bytes).
.It "\&oa num Offset of partition"
.Dq a
(sectors).
.It "\&ob num Offset of partition"
.Dq b
(sectors).
.It "\&oc num Offset of partition"
.Dq c
(sectors).
.It "\&od num Offset of partition"
.Dq d
(sectors).
.It "\&oe num Offset of partition"
.Dq e
(sectors).
.It "\&of num Offset of partition"
.Dq f
(sectors).
.It "\&og num Offset of partition"
.Dq g
(sectors).
.It "\&oh num Offset of partition"
.Dq h
(sectors).
.It "\&pa num Size of partition"
.Dq a
(sectors).
.It "\&pb num Size of partition"
.Dq b
(sectors).
.It "\&pc num Size of partition"
.Dq c
(sectors).
.It "\&pd num Size of partition"
.Dq d
(sectors).
.It "\&pe num Size of partition"
.Dq e
(sectors).
.It "\&pf num Size of partition"
.Dq f
(sectors).
.It "\&pg num Size of partition"
.Dq g
(sectors).
.It "\&ph num Size of partition"
.Dq h
(sectors).
.It "\&ta str Type of partition"
.Dq a
(4.2BSD, swap, etc.).
.It "\&tb str Type of partition"
.Dq b .
.It "\&tc str Type of partition"
.Dq c .
.It "\&td str Type of partition"
.Dq d .
.It "\&te str Type of partition"
.Dq e .
.It "\&tf str Type of partition"
.Dq f .
.It "\&tg str Type of partition"
.Dq g .
.It "\&th str Type of partition"
.Dq h .
.El
.Sh FILES
.Bl -tag -width /etc/disktab -compact
.It Pa /etc/disktab
.El
.Sh SEE ALSO
.Xr getdiskbyname 3 ,
.Xr disklabel 5 ,
.Xr disklabel 8 ,
.Xr newfs 8
.Sh HISTORY
The
.Nm
description file appeared in
.Bx 4.2 .
|
