4.3BSD-Reno/share/man/cat5/disktab.0

DISKTAB(5)		      1987		       DISKTAB(5)



NNAAMMEE
     disktab - disk description file

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<ddiisskkttaabb..hh>>

DDEESSCCRRIIPPTTIIOONN
     _D_i_s_k_t_a_b is a simple database which describes disk geometries
     and disk partition characteristics.  It is used to initial-
     ize the disk label on the disk.  The format is patterned
     after the _t_e_r_m_c_a_p(5) terminal data base.  Entries in _d_i_s_k_t_a_b
     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.

     The following list indicates the normal values stored for
     each disk entry.

     NNaammee   TTyyppee  DDeessccrriippttiioonn

     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, nc*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 SBSIZE
     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 or 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



Printed 7/27/90               June				1






DISKTAB(5)		      1987		       DISKTAB(5)



     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 filesystem, 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'

FFIILLEESS
     /etc/disktab

SSEEEE AALLSSOO
     getdiskbyname(3), disklabel(5), disklabel(8), newfs(8)


























Printed 7/27/90               June				2