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+.\" 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 BSD 4.2
+.Sh NAME
+.Nm disktab
+.Nd disk description file
+.Sh SYNOPSIS
+.Fd #include <disktab.h>
+.Sh DESCRIPTION
+.Nm Disktab
+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 data base. Entries in
+.Nm 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.
+.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, nc*nt default"
+.It "\&su num Number of sectors per unit, sc*nc default"
+.It "\&se num Sector size in bytes,"
+.Dv DEV_BSIZE
+default
+.It "\&sf bool Controller supports bad144-style bad sector forwarding"
+.It "\&rm num Rotation speed, rpm, 3600 default"
+.It "\&sk num Sector skew per track, default 0"
+.It "\&cs num Sector skew per cylinder, default 0"
+.It "\&hs num Headswitch time, usec, default 0"
+.It "\&ts num One-cylinder seek time, usec, default 0"
+.It "\&il num Sector interleave (n:1), 1 default"
+.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 `a' (bytes)"
+.It "\&bd num Block size for partition `d' (bytes)"
+.It "\&be num Block size for partition `e' (bytes)"
+.It "\&bf num Block size for partition `f' (bytes)"
+.It "\&bg num Block size for partition `g' (bytes)"
+.It "\&bh num Block size for partition `h' (bytes)"
+.It "\&fa num Fragment size for partition `a' (bytes)"
+.It "\&fd num Fragment size for partition `d' (bytes)"
+.It "\&fe num Fragment size or partition `e' (bytes)"
+.It "\&ff num Fragment size for partition `f' (bytes)"
+.It "\&fg num Fragment size for partition `g' (bytes)"
+.It "\&fh num Fragment size for partition `h' (bytes)"
+.It "\&oa num Offset of partition `a' in sectors"
+.It "\&ob num Offset of partition `b' in sectors"
+.It "\&oc num Offset of partition `c' in sectors"
+.It "\&od num Offset of partition `d' in sectors"
+.It "\&oe num Offset of partition `e' in sectors"
+.It "\&of num Offset of partition `f' in sectors"
+.It "\&og num Offset of partition `g' in sectors"
+.It "\&oh num Offset of partition `h' in sectors"
+.It "\&pa num Size of partition `a' in sectors"
+.It "\&pb num Size of partition `b' in sectors"
+.It "\&pc num Size of partition `c' in sectors"
+.It "\&pd num Size of partition `d' in sectors"
+.It "\&pe num Size of partition `e' in sectors"
+.It "\&pf num Size of partition `f' in sectors"
+.It "\&pg num Size of partition `g' in sectors"
+.It "\&ph num Size of partition `h' in sectors"
+.It "\&ta str Partition type of partition `a'"
+.Pf ( Bx 4.2
+filesystem, swap, etc)
+.It "\&tb str Partition type of partition `b'"
+.It "\&tc str Partition type of partition `c'"
+.It "\&td str Partition type of partition `d'"
+.It "\&te str Partition type of partition `e'"
+.It "\&tf str Partition type of partition `f'"
+.It "\&tg str Partition type of partition `g'"
+.It "\&th str Partition type of partition `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 .
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