diskinfo(8) [freebsd man page]

DISKINFO(8)						    BSD System Manager's Manual 					       DISKINFO(8)

NAME

     diskinfo -- get information about disk device

SYNOPSIS

     diskinfo [-ctv] disk ...

DESCRIPTION

     The diskinfo utility prints out information about a disk device, and optionally runs a naive performance test on the device.

     If given no arguments, the output will be a single line per specified device with the following fields: device name, sectorsize, media size
     in bytes, media size in sectors, stripe size, stripe offset, firmware cylinders, firmware heads, and firmware sectors.  The last three fields
     are only present if the information is available.

     If given the -v option, the fields will be printed one per line with a descriptive comment.

     The -c option triggers a simple measurement of the I/O read command overhead.

     The -t option triggers a simple and rather naive benchmark of the disks seek and transfer performance.

HISTORY

     The diskinfo command appeared in FreeBSD 5.1.

AUTHORS

     Poul-Henning Kamp

BUGS

     There are in order of increasing severity: lies, damn lies, statistics, and computer benchmarks.

BSD
								 November 9, 2004							       BSD

DISKTAB(5)							File Formats Manual							DISKTAB(5)

NAME

       disktab - disk description file

SYNOPSIS

       #include <disktab.h>

DESCRIPTION

       Disktab	is a simple date base which describes disk geometries and disk partition characteristics.  The format is patterned after the term-
       cap(5) terminal data base.  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    str   Filename of block zero primary bootstrap for device
       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 (default 512)
       sf    bool  supports bad144-style bad sector forwarding
       so    bool  partition offsets in sectors
       ty    str   Type of disk (e.g. removable, winchester)

       Disktab entries may be automatically generated with the diskpart program.

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.

4.2 Berkeley Distribution					   May 17, 1986 							DISKTAB(5)