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.\"
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.\" $NetBSD: mdconfig.8,v 1.2 1997/01/02 00:22:44 pk Exp $
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.\"
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.\" Copyright (c) 1995 Gordon W. Ross
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd July 8, 1993
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.Dt MDCONFIG 8
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.Os BSD 4
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.Sh NAME
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.Nm mdconfig
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.Nd configure MEMORY disks
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.Sh SYNOPSIS
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.Nm mdconfig Fl c
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.Op Fl v
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.Ar special_file
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.Ar 512-byte-blocks
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.Sh DESCRIPTION
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The
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.Nm mdconfig
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command configures memory disk devices.
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It will associate the special file
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.Ar special_file
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with a range of user-virtual memory allocated by the
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.Nm mdconfig
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process itself. The
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.Nm mdconfig
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command should be run in the background.
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If successful, the command will not return.
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Otherwise, an error message will be printed.
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.Pp
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To "unconfigure" the memory disk, just kill the background
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.Nm mdconfig
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process started earlier.
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.Sh FILES
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.Bl -tag -width /etc/rmd?? -compact
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.It Pa /dev/rmd??
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.It Pa /dev/md??
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.El
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.Sh EXAMPLES
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.Pp
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.Dl mdconfig /dev/md0a 2048 &
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.Pp
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Configures the memory disk
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.Pa md0a
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with one megabyte of user-space memory.
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.Sh BUGS
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The special device will become inoperative if the
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.Nm mdconfig
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process is killed while the special device is open.
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.Sh SEE ALSO
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.Xr swapon 8 ,
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.Xr mount 8 ,
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.Xr umount 8 .
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