freebsd man page for diskinfo

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