.\"
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.\" Copyright (c) 1995 Gordon W. Ross
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.Dd July 8, 1993
.Dt MDCONFIG 8
.Os
.Sh NAME
.Nm mdconfig
.Nd configure MEMORY disks
.Sh SYNOPSIS
.Nm
.Ar special_file
.Ar 512-byte-blocks
.Sh DESCRIPTION
The
.Nm
command configures memory disk devices.
It will associate the special file 
.Ar special_file
with a range of user-virtual memory allocated by the
.Nm
process itself.  The
.Nm
command should be run in the background.
If successful, the command will not return.
Otherwise, an error message will be printed.
.Pp
To "unconfigure" the memory disk, just kill the background
.Nm
process started earlier.
.Sh FILES
.Bl -tag -width /etc/rmd?? -compact
.It Pa /dev/rmd??
.It Pa /dev/md??
.El
.Sh EXAMPLES
.Pp
.Dl mdconfig /dev/md0c 2048 &
.Pp
Configures the memory disk
.Pa md0c
with one megabyte of user-space memory.
.Sh BUGS
The special device will become inoperative if the
.Nm
process is killed while the special device is open.
.Sh SEE ALSO
.Xr swapon 8 ,
.Xr mount 8 ,
.Xr umount 8 .