4.3BSD-UWisc/man/cat5/disktab.5

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DISKTAB(5)          UNIX Programmer's Manual           DISKTAB(5)



NAME
     disktab - disk description file

SYNOPSIS
     #include <disktab.h>

DESCRIPTION
     _D_i_s_k_t_a_b is a simple date base which describes disk
     geometries and disk partition characteristics.  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.

     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
     sf    bool  supports bad144-style bad sector forwarding
     so    bool  partition offsets in sectors
     ty    str   Type of disk (e.g. removable, winchester)

     _D_i_s_k_t_a_b entries may be automatically generated with the
     _d_i_s_k_p_a_r_t program.





Printed 12/27/86          May 17, 1986                          1






DISKTAB(5)          UNIX Programmer's Manual           DISKTAB(5)



FILES
     /etc/disktab

SEE ALSO
     newfs(8), diskpart(8), getdiskbyname(3)

BUGS
     This file shouldn't exist, the information should be stored
     on each disk pack.














































Printed 12/27/86          May 17, 1986                          2