Content-type: text/html Man page of disktab

disktab

Section: Devices and Network Interfaces (4)
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NAME

disktab - Disk description file  

SYNOPSIS

#include <sys/disklabel.h>  

DESCRIPTION

The disktab database describes disk geometries and disk partition characteristics. It is used to initialize the disk label on the disk. The format is patterned after the termcap terminal database. Entries in a disktab file consist of a number of : (colon) separated fields. The first entry for each disk gives the names which are known for the disk, separated by | (vertical bar) characters. The last name given should be a long name fully identifying the disk.

The following list indicates the normal values stored for each disk entry: Type  Description
str    Type of disk (for example, removable, winchester)
str    Type of controller (for example, SMD, ESDI,
        floppy)
num    Number of sectors per track
num    Number of tracks per cylinder
num    Total number of cylinders on the disk
num    Number of sectors per cylinder, nc*nt default
num    Number of sectors per unit, sc*nc default
num    Sector size in bytes, DEV_BSIZE default
bool   Controller supports bad144-style bad sector
        forwarding
num    Rotation speed, rpm, default 3600
num    Sector skew per track, default 0
num    Sector skew per cylinder, default 0
num    Headswitch time, usec, default 0
num    One-cylinder seek time, usec, default 0
num    Sector interleave (n:1), default 1
num    Drive-type-dependent parameters
num    Boot block size, default BBSIZE
num    Superblock size, default SBSIZE
num    Block size for partition `a' (bytes)
num    Block size for partition `d' (bytes)
num    Block size for partition `e' (bytes)
num    Block size for partition `f' (bytes)
num    Block size for partition `g' (bytes)
num    Block size for partition `h' (bytes)
num    Fragment size for partition `a' (bytes)
num    Fragment size for partition `d' (bytes)
num    Fragment size for partition `e' (bytes)
num    Fragment size for partition `f' (bytes)
num    Fragment size for partition `g' (bytes)
num    Fragment size for partition `h' (bytes)
num    Offset of partition `a' in sectors
num    Offset of partition `b' in sectors
num    Offset of partition `c' in sectors
num    Offset of partition `d' in sectors
num    Offset of partition `e' in sectors
num    Offset of partition `f' in sectors
num    Offset of partition `g' in sectors
num    Offset of partition `h' in sectors
num    Size of partition `a' in sectors
num    Size of partition `b' in sectors
num    Size of partition `c' in sectors
num    Size of partition `d' in sectors
num    Size of partition `e' in sectors
num    Size of partition `f' in sectors
num    Size of partition `g' in sectors
num    Size of partition `h' in sectors
str    Partition type of partition `a' (4.2BSD file system,
        swap, etc.)
str    Partition type of partition `b'
str    Partition type of partition `c'
str    Partition type of partition `d'
str    Partition type of partition `e'
str    Partition type of partition `f'
str    Partition type of partition `g'
str    Partition type of partition `h'
 

EXAMPLES

The following is an example disktab entry:

rz25|RZ25|DEC RZ25 Winchester:\
        :ty=winchester:dt=SCSI:ns#62:nt#9:nc#1492:\
        :oa#0:pa#131072:ba#8192:fa#1024:\
        :ob#131072:pb#262144:bb#8192:fb#1024:\
        :oc#0:pc#832527:bc#8192:fc#1024:\
        :od#393216:pd#146437:bd#8192:fd#1024:\
        :oe#539656:pe#146437:be#8192:fe#1024:\
        :of#686096:pf#146437:bf#8192:ff#1024:\
        :og#393216:pg#439311:bg#8192:fg#1024:\
        :oh#0:ph#0:bh#8192:fh#1024:  

FILES

/etc/disktab  

RELATED INFORMATION

Functions: getdiskbyname(3)

Files: disklabel(4)

Commands: disklabel(8), newfs(8) delim off


 

Index

NAME
SYNOPSIS
DESCRIPTION
EXAMPLES
FILES
RELATED INFORMATION

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Time: 02:40:06 GMT, October 02, 2010