.\" $Id$
.TH DISK 8 "$Date$" "(c)1994 Larry McVoy" "LMBENCH"
.SH NAME
disk \- report raw disk performance
.SH SYNOPSIS
.B disk rdisk
.SH DESCRIPTION
.B disk
reports the seek latencies and transfer bandwidths for the
raw disk
.BR rdisk .
It determines the disk size and measures seek latencies 
for 2000 seek distances and transfer bandwidths for 150
zone locations.  The measurement points are spread uniformly
across the disk to provide a representative picture of the
disk performance.
The seek distance is expressed in megabytes, since
.B disk
does not have access to the raw disk geometry information.
The zone location is expressed in megabytes from location 0
of the disk.
.SH OUTPUT
Output format for seek latencies is \f(CB"%0.1f %.2f\\n", megabytes, 
milli-seconds\fP, i.e.,
.sp
.ft CB
 25.33
.ft
Output format for zone bandwidths is \f(CB"%0.1f %.2f\\n", megabytes, 
megabytes_per_second\fP, i.e.,
.sp
.ft CB
8.00 25.33
.ft
.SH ACKNOWLEDGEMENT
Funding for the development of
this tool was provided by Sun Microsystems Computer Corporation.
.SH "SEE ALSO"
lmbench(8).