disktab(5) [ultrix man page]

disktab(5)							File Formats Manual							disktab(5)

Name
       disktab - disk description file

Syntax
       #include <disktab.h>

Description
       The file is a simple data base that describes disk geometries and disk partition characteristics.  The format is patterned after the termi-
       nal data base.  Entries in consist of a number of fields separated by colons (:).  The first entry for each disk gives the names  that  are
       known for the disk, separated by vertical bars (|).  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:
       Name Type Description
       ns   num  Number of sectors per track
       nt   num  Number of tracks per cylinder
       nc   num  Total number of cylinders on the disk
       ba   num  Block size for partition `a' (bytes)
       bd   num  Block size for partition `d' (bytes)
       be   num  Block size for partition `e' (bytes)
       bf   num  Block size for partition `f' (bytes)
       bg   num  Block size for partition `g' (bytes)
       bh   num  Block size for partition `h' (bytes)
       fa   num  Fragment size for partition `a' (bytes)
       fd   num  Fragment size for partition `d' (bytes)
       fe   num  Fragment size for partition `e' (bytes)
       ff   num  Fragment size for partition `f' (bytes)
       fg   num  Fragment size for partition `g' (bytes)
       fh   num  Fragment size for partition `h' (bytes)
       pa   num  Size of partition `a' in sectors
       pb   num  Size of partition `b' in sectors
       pc   num  Size of partition `c' in sectors
       pd   num  Size of partition `d' in sectors
       pe   num  Size of partition `e' in sectors
       pf   num  Size of partition `f' in sectors
       pg   num  Size of partition `g' in sectors
       ph   num  Size of partition `h' in sectors
       se   num  Sector size in bytes
       ty   str  Type of disk (e.g. removable, winchester)

       The entries can be automatically generated with the program.

Files
See Also
       chpt(8), newfs(8)

																	disktab(5)

DISKTAB(5)						      BSD File Formats Manual							DISKTAB(5)

NAME

     disktab -- disk description file

SYNOPSIS

     #include <disklabel.h>

DESCRIPTION

     Disktab is a simple database which 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(5) terminal data base.  Entries in disktab consist of a number of `:'-separated fields.
     The first field for each entry gives the names by which a disk's entry may be selected, separated by `|' characters.  The last name given
     should be a long name fully identifying the disk.

     The optional fields for each entry are:

     ID        Type	Description
     ty        str	Type of disk (e.g. removable, winchester)
     dt        str	Type of controller (e.g. SMD, ESDI, floppy)
     ns        num	Number of sectors per track
     nt        num	Number of tracks per cylinder
     nc        num	Total number of cylinders on the disk
     sc        num	Number of sectors per cylinder, ns*nt default
     su        num	Number of sectors per unit, sc*nc default
     se        num	Sector size in bytes, DEV_BSIZE default
     sf        bool	Controller supports bad144-style bad sector forwarding
     rm        num	Rotation speed, rpm, 3600 default
     sk        num	Sector skew per track, default 0
     cs        num	Sector skew per cylinder, default 0
     hs        num	Headswitch time, usec, default 0
     ts        num	One-cylinder seek time, usec, default 0
     il        num	Sector interleave (n:1), 1 default
     d[0-4]    num	Drive-type-dependent parameters
     bs        num	Boot block size, default BBSIZE
     sb        num	Superblock size, default 0
     ba        num	Block size for partition `a' (bytes)
     bd        num	Block size for partition `d' (bytes)
     be        num	Block size for partition `e' (bytes)
     bf        num	Block size for partition `f' (bytes)
     bg        num	Block size for partition `g' (bytes)
     bh        num	Block size for partition `h' (bytes)
     fa        num	Fragment size for partition `a' (bytes)
     fd        num	Fragment size for partition `d' (bytes)
     fe        num	Fragment size for partition `e' (bytes)
     ff        num	Fragment size for partition `f' (bytes)
     fg        num	Fragment size for partition `g' (bytes)
     fh        num	Fragment size for partition `h' (bytes)
     oa        num	Offset of partition `a' in sectors
     ob        num	Offset of partition `b' in sectors
     oc        num	Offset of partition `c' in sectors
     od        num	Offset of partition `d' in sectors
     oe        num	Offset of partition `e' in sectors
     of        num	Offset of partition `f' in sectors
     og        num	Offset of partition `g' in sectors
     oh        num	Offset of partition `h' in sectors
     pa        num	Size of partition `a' in sectors
     pb        num	Size of partition `b' in sectors
     pc        num	Size of partition `c' in sectors
     pd        num	Size of partition `d' in sectors
     pe        num	Size of partition `e' in sectors
     pf        num	Size of partition `f' in sectors
     pg        num	Size of partition `g' in sectors
     ph        num	Size of partition `h' in sectors
     ta        str	Partition type of partition `a' (4.2BSD file system, swap, etc)
     tb        str	Partition type of partition `b'
     tc        str	Partition type of partition `c'
     td        str	Partition type of partition `d'
     te        str	Partition type of partition `e'
     tf        str	Partition type of partition `f'
     tg        str	Partition type of partition `g'
     th        str	Partition type of partition `h'

FILES

     /etc/disktab

SEE ALSO

     getdiskbyname(3), bsdlabel(8), newfs(8)

HISTORY

     The disktab description file appeared in 4.2BSD.

BSD
								 October 14, 2006							       BSD