freebsd-dev/usr.sbin/diskinfo/diskinfo.8
Edward Tomasz Napierala af375c284d Small tweaks to the diskinfo(8) manual page, to make it more consistent
with others.

MFC after:	1 month
2016-09-22 07:55:07 +00:00

78 lines
2.7 KiB
Groff

.\"
.\" Copyright (c) 2003 Poul-Henning Kamp
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.\" $FreeBSD$
.\"
.Dd September 22, 2016
.Dt DISKINFO 8
.Os
.Sh NAME
.Nm diskinfo
.Nd get information about disk device
.Sh SYNOPSIS
.Nm
.Op Fl citv
.Ar disk ...
.Sh DESCRIPTION
The
.Nm
utility prints out information about a disk device,
and optionally runs a naive performance test on the device.
.Pp
The following options are available:
.Bl -tag -width ".Fl v"
.It Fl v
Print fields one per line with a descriptive comment.
.It Fl c
Perform a simple measurement of the I/O read command overhead.
.It Fl i
Perform a simple IOPS benchmark.
.It Fl t
Perform a simple and rather naive benchmark of the disks seek
and transfer performance.
.El
.Pp
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.
.Sh HISTORY
The
.Nm
command appeared in
.Fx 5.1 .
.Sh AUTHORS
The
.Nm
utility was written by
.An Poul-Henning Kamp Aq Mt phk@FreeBSD.org .
.Sh BUGS
There are in order of increasing severity: lies,
damn lies, statistics, and computer benchmarks.