Copyright (c) 2003 Poul-Henning Kamp
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. The names of the authors may not be used to endorse or promote
products derived from this software without specific prior written
permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.

$FreeBSD$

.Dd November 9, 2004 .Dt DISKINFO 8 .Os .Sh NAME .Nm diskinfo .Nd get information about disk device .Sh SYNOPSIS .Nm .Op Fl ctv .Ar disk ... .Sh DESCRIPTION The .Nm utility prints out information about a disk device, and optionally runs a naive performance test on the device.

p 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.

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

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

p The .Fl t option triggers a simple and rather naive benchmark of the disks seek and transfer performance. .Sh HISTORY The .Nm command appeared in .Fx 5.1 . .Sh AUTHORS .An Poul-Henning Kamp .Sh BUGS There are in order of increasing severity: lies, damn lies, statistics, and computer benchmarks.