1.\" 2.\" Copyright (c) 2003 Poul-Henning Kamp 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. The names of the authors may not be used to endorse or promote 14.\" products derived from this software without specific prior written 15.\" permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.\" $FreeBSD$ 30.\" 31.Dd November 9, 2004 32.Dt DISKINFO 8 33.Os 34.Sh NAME 35.Nm diskinfo 36.Nd get information about disk device 37.Sh SYNOPSIS 38.Nm 39.Op Fl ctv 40.Ar disk ... 41.Sh DESCRIPTION 42The 43.Nm 44utility prints out information about a disk device, 45and optionally runs a naive performance test on the device. 46.Pp 47If given no arguments, the output will be a single line per specified device 48with the following fields: device name, sectorsize, media size in bytes, 49media size in sectors, stripe size, stripe offset, firmware cylinders, 50firmware heads, and firmware sectors. 51The last three fields are only present if the information is available. 52.Pp 53If given the 54.Fl v 55option, the fields will be printed one per line with a descriptive comment. 56.Pp 57The 58.Fl c 59option triggers a simple measurement of the I/O read command overhead. 60.Pp 61The 62.Fl t 63option triggers a simple and rather naive benchmark of the disks seek 64and transfer performance. 65.Sh HISTORY 66The 67.Nm 68command appeared in 69.Fx 5.1 . 70.Sh AUTHORS 71.An Poul-Henning Kamp 72.Sh BUGS 73There are in order of increasing severity: lies, 74damn lies, statistics, and computer benchmarks. 75