1DISKTAB(5)                    File Formats Manual                   DISKTAB(5)
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NAME

6       disktab - disk description file
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SYNOPSIS

9       #include <disktab.h>
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DESCRIPTION

12       Disktab  is a simple date base which describes disk geometries and disk
13       partition characteristics.  The format is  patterned  after  the  term‐
14       cap(5)  terminal  data base.  Entries in disktab consist of a number of
15       `:' separated fields.  The first entry for each disk  gives  the  names
16       which  are  known  for the disk, separated by `|' characters.  The last
17       name given should be a long name fully identifying the disk.
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19       The following list indicates the normal values  stored  for  each  disk
20       entry.
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22       Name  Type  Description
23       ns    num   Number of sectors per track
24       nt    num   Number of tracks per cylinder
25       nc    num   Total number of cylinders on the disk
26       b0    str   Filename of block zero primary bootstrap for device
27       ba    num   Block size for partition `a' (bytes)
28       bd    num   Block size for partition `d' (bytes)
29       be    num   Block size for partition `e' (bytes)
30       bf    num   Block size for partition `f' (bytes)
31       bg    num   Block size for partition `g' (bytes)
32       bh    num   Block size for partition `h' (bytes)
33       fa    num   Fragment size for partition `a' (bytes)
34       fd    num   Fragment size for partition `d' (bytes)
35       fe    num   Fragment size for partition `e' (bytes)
36       ff    num   Fragment size for partition `f' (bytes)
37       fg    num   Fragment size for partition `g' (bytes)
38       fh    num   Fragment size for partition `h' (bytes)
39       pa    num   Size of partition `a' in sectors
40       pb    num   Size of partition `b' in sectors
41       pc    num   Size of partition `c' in sectors
42       pd    num   Size of partition `d' in sectors
43       pe    num   Size of partition `e' in sectors
44       pf    num   Size of partition `f' in sectors
45       pg    num   Size of partition `g' in sectors
46       ph    num   Size of partition `h' in sectors
47       se    num   Sector size in bytes (default 512)
48       sf    bool  supports bad144-style bad sector forwarding
49       so    bool  partition offsets in sectors
50       ty    str   Type of disk (e.g. removable, winchester)
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52       Disktab  entries  may be automatically generated with the diskpart pro‐
53       gram.
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FILES

56       /etc/disktab
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SEE ALSO

59       newfs(8), diskpart(8), getdiskbyname(3)
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BUGS

62       This file shouldn't exist, the information should  be  stored  on  each
63       disk pack.
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674.2 Berkeley Distribution        May 17, 1986                       DISKTAB(5)