1*c0a65584Skrw.\" $OpenBSD: disktab.5,v 1.23 2022/11/07 10:21:17 krw Exp $ 2df930be7Sderaadt.\" $NetBSD: disktab.5,v 1.4 1994/11/30 19:31:15 jtc Exp $ 3df930be7Sderaadt.\" 4df930be7Sderaadt.\" Copyright (c) 1983, 1991, 1993 5df930be7Sderaadt.\" The Regents of the University of California. All rights reserved. 6df930be7Sderaadt.\" 7df930be7Sderaadt.\" Redistribution and use in source and binary forms, with or without 8df930be7Sderaadt.\" modification, are permitted provided that the following conditions 9df930be7Sderaadt.\" are met: 10df930be7Sderaadt.\" 1. Redistributions of source code must retain the above copyright 11df930be7Sderaadt.\" notice, this list of conditions and the following disclaimer. 12df930be7Sderaadt.\" 2. Redistributions in binary form must reproduce the above copyright 13df930be7Sderaadt.\" notice, this list of conditions and the following disclaimer in the 14df930be7Sderaadt.\" documentation and/or other materials provided with the distribution. 1529295d1cSmillert.\" 3. Neither the name of the University nor the names of its contributors 16df930be7Sderaadt.\" may be used to endorse or promote products derived from this software 17df930be7Sderaadt.\" without specific prior written permission. 18df930be7Sderaadt.\" 19df930be7Sderaadt.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20df930be7Sderaadt.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21df930be7Sderaadt.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22df930be7Sderaadt.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23df930be7Sderaadt.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24df930be7Sderaadt.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25df930be7Sderaadt.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26df930be7Sderaadt.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27df930be7Sderaadt.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28df930be7Sderaadt.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29df930be7Sderaadt.\" SUCH DAMAGE. 30df930be7Sderaadt.\" 31df930be7Sderaadt.\" @(#)disktab.5 8.1 (Berkeley) 6/5/93 32df930be7Sderaadt.\" 33*c0a65584Skrw.Dd $Mdocdate: November 7 2022 $ 34df930be7Sderaadt.Dt DISKTAB 5 35fc8533a3Saaron.Os 36df930be7Sderaadt.Sh NAME 37df930be7Sderaadt.Nm disktab 38df930be7Sderaadt.Nd disk description file 39df930be7Sderaadt.Sh DESCRIPTION 40fbd19cc4Saaron.Nm 41df930be7Sderaadtis a simple database which describes disk geometries and 42df930be7Sderaadtdisk partition characteristics. 43df930be7SderaadtIt is used 44df930be7Sderaadtto initialize the disk label on the disk. 45431305c8SaaronThe format is patterned after the 46df930be7Sderaadt.Xr termcap 5 471f53fde1Saaronterminal database. 481f53fde1SaaronEntries in 49fbd19cc4Saaron.Nm 50ae8c025fSaaronconsist of a number of colon 51431305c8Saaron.Pq Ql \&: 521f53fde1Saaronseparated fields. 531f53fde1SaaronThe first entry for each disk gives the names which are 54ae8c025fSaaronknown for the disk, separated by 55ae8c025fSaaron.Dq \&| 561f53fde1Saaroncharacters. 57431305c8SaaronThe last name given should be a long name fully identifying the disk. 58df930be7Sderaadt.Pp 59431305c8SaaronThe following list indicates the normal values stored for each disk entry: 60e324319bSjmc.Bl -column "d[0-4]" "bool" "Description" 61e324319bSjmc.It Sy Name Ta Sy Type Ta Sy Description 62e324319bSjmc.It \&dt Ta str Ta "Type of controller (e.g., SMD, ESDI, floppy)." 63e324319bSjmc.It \&ns Ta num Ta "Number of sectors per track." 64e324319bSjmc.It \&nt Ta num Ta "Number of tracks per cylinder." 65e324319bSjmc.It \&nc Ta num Ta "Total number of cylinders on the disk." 66e324319bSjmc.It \&sc Ta num Ta "Number of sectors per cylinder (default: ns*nt)." 67e324319bSjmc.It \&su Ta num Ta "Number of sectors per unit (default: sc*nc)." 68e324319bSjmc.It \&se Ta num Ta "Sector size in bytes (default:" 69ae8c025fSaaron.Dv DEV_BSIZE ) . 7010dd043fSjmc.Pp 71e324319bSjmc.It \&ba Ta num Ta "Block size for partition" 72ae8c025fSaaron.Dq a 73ae8c025fSaaron(bytes). 74e324319bSjmc.It \&bd Ta num Ta "Block size for partition" 75ae8c025fSaaron.Dq d 76ae8c025fSaaron(bytes). 77e324319bSjmc.It \&be Ta num Ta "Block size for partition" 78ae8c025fSaaron.Dq e 79ae8c025fSaaron(bytes). 80e324319bSjmc.It [...] Ta "" Ta "" 81e324319bSjmc.It \&bp Ta num Ta "Block size for partition" 8210dd043fSjmc.Dq p 83ae8c025fSaaron(bytes). 8410dd043fSjmc.Pp 85e324319bSjmc.It \&fa Ta num Ta "Fragment size for partition" 86ae8c025fSaaron.Dq a 87ae8c025fSaaron(bytes). 88e324319bSjmc.It \&fd Ta num Ta "Fragment size for partition" 89ae8c025fSaaron.Dq d 90ae8c025fSaaron(bytes). 91e324319bSjmc.It \&fe Ta num Ta "Fragment size for partition" 92ae8c025fSaaron.Dq e 93ae8c025fSaaron(bytes). 94e324319bSjmc.It [...] Ta "" Ta "" 95e324319bSjmc.It \&fp Ta num Ta "Fragment size for partition" 9610dd043fSjmc.Dq p 97ae8c025fSaaron(bytes). 9810dd043fSjmc.Pp 99e324319bSjmc.It \&oa Ta num Ta "Offset of partition" 100ae8c025fSaaron.Dq a 101ae8c025fSaaron(sectors). 102e324319bSjmc.It \&ob Ta num Ta "Offset of partition" 103ae8c025fSaaron.Dq b 104ae8c025fSaaron(sectors). 105e324319bSjmc.It \&oc Ta num Ta "Offset of partition" 106ae8c025fSaaron.Dq c 107ae8c025fSaaron(sectors). 108e324319bSjmc.It [...] Ta "" Ta "" 109e324319bSjmc.It \&op Ta num Ta "Offset of partition" 11010dd043fSjmc.Dq p 111ae8c025fSaaron(sectors). 11210dd043fSjmc.Pp 113e324319bSjmc.It \&pa Ta num Ta "Size of partition" 114ae8c025fSaaron.Dq a 115ae8c025fSaaron(sectors). 116e324319bSjmc.It \&pb Ta num Ta "Size of partition" 117ae8c025fSaaron.Dq b 118ae8c025fSaaron(sectors). 119e324319bSjmc.It \&pc Ta num Ta "Size of partition" 120ae8c025fSaaron.Dq c 121ae8c025fSaaron(sectors). 122e324319bSjmc.It [...] Ta "" Ta "" 123e324319bSjmc.It \&pp Ta num Ta "Size of partition" 12410dd043fSjmc.Dq p 125ae8c025fSaaron(sectors). 12610dd043fSjmc.Pp 127e324319bSjmc.It \&ta Ta str Ta "Type of partition" 128ae8c025fSaaron.Dq a 129ae8c025fSaaron(4.2BSD, swap, etc.). 130e324319bSjmc.It \&tb Ta str Ta "Type of partition" 131ae8c025fSaaron.Dq b . 132e324319bSjmc.It \&tc Ta str Ta "Type of partition" 133ae8c025fSaaron.Dq c . 134e324319bSjmc.It [...] Ta "" Ta "" 135e324319bSjmc.It \&tp Ta str Ta "Type of partition" 13610dd043fSjmc.Dq p . 137df930be7Sderaadt.El 138df930be7Sderaadt.Sh FILES 139df930be7Sderaadt.Bl -tag -width /etc/disktab -compact 140df930be7Sderaadt.It Pa /etc/disktab 141df930be7Sderaadt.El 142df930be7Sderaadt.Sh SEE ALSO 143df930be7Sderaadt.Xr getdiskbyname 3 , 144df930be7Sderaadt.Xr disklabel 5 , 145df930be7Sderaadt.Xr disklabel 8 , 146df930be7Sderaadt.Xr newfs 8 147df930be7Sderaadt.Sh HISTORY 148df930be7SderaadtThe 149df930be7Sderaadt.Nm 150df930be7Sderaadtdescription file appeared in 151df930be7Sderaadt.Bx 4.2 . 152