.TH DISKCTL 8
.SH NAME
diskctl \- control disk drive
.SH SYNOPSIS
\fBdiskctl\fR \fIdevice\fR \fIcommand\fR [\fIarguments\fR]
.SH DESCRIPTION
The \fBdiskctl\fR tool allows one to view and manage settings of,
and perform actions on, disk drives. The following paragraph lists the
commands that are currently supported by this tool.
Please note that not all disks and drivers support all commands.
.SH COMMANDS
.TP 10
\fBgetwcache\fR
Retrieve the status (on or off) of the write cache on the device.
.TP 10
\fBsetwcache\fR [\fBon\fR|\fBoff\fR]
Enable or disable the write cache on the device.
Disabling the write cache typically also triggers a cache flush.
.TP 10
\fBflush\fR
Tell the device to flush its write cache.
The call will not return until the cache flush has completed.
.SH EXAMPLES
.TP 20
.B diskctl /dev/c0d0 setwcache on
# Turn on the write cache on c0d0.
.TP 20
.B diskctl /dev/c1d2 flush
# Trigger a cache flush on c1d2.
.SH "SEE ALSO"
.BR controller (4).
.SH AUTHOR
David van Moolenbroek <dcvmoole@cs.vu.nl>