disktab(7)             DEVICES AND MODULES             disktab(7)



NAME
     disktab - disk description file

SYNOPSIS
     #include <disktab.h>

DESCRIPTION
     Disktab  is  a  simple  data  base  which   describes   disk
     geometries  and  disk  partition characteristics. Entries in
     disktab 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
     b0    num   Block size for partition `0' (bytes)
     b3    num   Block size for partition `3' (bytes)
     b4    num   Block size for partition `4' (bytes)
     b5    num   Block size for partition `5' (bytes)
     b6    num   Block size for partition `6' (bytes)
     b7    num   Block size for partition `7' (bytes)
     f0    num   Fragment size for partition `0' (bytes)
     f3    num   Fragment size for partition `3' (bytes)
     f4    num   Fragment size for partition `4' (bytes)
     f5    num   Fragment size for partition `5' (bytes)
     f6    num   Fragment size for partition `6' (bytes)
     f7    num   Fragment size for partition `7' (bytes)
     o0    num   First sector number of partition `0'
     o1    num   First sector number of partition `1'
     o2    num   First sector number of partition `2'
     o3    num   First sector number of partition `3'
     o4    num   First sector number of partition `4'
     o5    num   First sector number of partition `5'
     o6    num   First sector number of partition `6'
     o7    num   First sector number of partition `7'
     p0    num   Size of partition `0' in sectors
     p1    num   Size of partition `1' in sectors
     p2    num   Size of partition `2' in sectors
     p3    num   Size of partition `3' in sectors
     p4    num   Size of partition `4' in sectors
     p5    num   Size of partition `5' in sectors
     p6    num   Size of partition `6' in sectors
     p7    num   Size of partition `7' in sectors
     se    num   Sector size in bytes
     sf    bool  supports bad144-style bad sector forwarding




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disktab(7)             DEVICES AND MODULES             disktab(7)



     so    bool  partition offsets in sectors
     ty    str   Type of disk (e.g. removable, winchester)

NOTES
     Partition `a' is recognized as partition `0'.
     Partition `b' is recognized as partition `1'.
     Partition `c' is recognized as partition `2'.
     Partition `d' is recognized as partition `3'.
     Partition `e' is recognized as partition `4'.
     Partition `f' is recognized as partition `5'.
     Partition `g' is recognized as partition `6'.
     Partition `h' is recognized as partition `7'.

FILES
     /etc/disktab

SEE ALSO
     fmthard(1M), newfs(1M)





































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