.TH VDISK_CTRL 8
.SH NAME
vdisk_ctrl \- control virtual disk devices
.SH SYNOPSIS
.B vdisk_ctrl \-c
.I config-file
.SH DESCRIPTION
.de SP
.if t .sp 0.4
.if n .sp
..
.B Vdisk_ctrl
uses the information from a virtual disk configuration file to configure
virtual disk devices.  Virtual disks are explained in
.BR vd (4),
and the configuration file format in
.BR vdisk.conf (5).
.PP
The configuration file can be a minus sign to indicate standard input, to
allow daring administrators to program virtual disks on the command line.
.br
("\fBvd\fIn\fB = null\fR" is a handy way to unconfigure a virtual disk.)
.SH OPTIONS
.TP
.B \-c
For now the only option: program virtual disks from a configuration file.
.SH FILES
.TP 20n
.B /etc/vdisk.conf
The configuration file used at boot time.
.SH "SEE ALSO"
.BR vd (4),
.BR vdisk.conf (5),
.BR boot (8).
.SH DIAGNOSTICS
"Resource busy" messages if you try to reprogram a virtual disk that is in
use, or if you try to include a virtual disk in more than one other virtual
disk, or into itself.
.SH AUTHOR
Kees J. Bot (kjb@cs.vu.nl)