146 lines
4.7 KiB
Groff
146 lines
4.7 KiB
Groff
|
.\" Copyright (c) 1993 University of Utah.
|
||
|
|
.\" Copyright (c) 1980, 1989, 1991, 1993
|
||
|
|
.\" The Regents of the University of California. All rights reserved.
|
||
|
|
.\" Copyright (c) 2000
|
||
|
|
.\" Poul-Henning Kamp All rights reserved.
|
||
|
|
.\"
|
||
|
|
.\" This code is derived from software contributed to Berkeley by
|
||
|
|
.\" the Systems Programming Group of the University of Utah Computer
|
||
|
|
.\" Science Department.
|
||
|
|
.\"
|
||
|
|
.\" Redistribution and use in source and binary forms, with or without
|
||
|
|
.\" modification, are permitted provided that the following conditions
|
||
|
|
.\" are met:
|
||
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer.
|
||
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
||
|
|
.\" documentation and/or other materials provided with the distribution.
|
||
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
||
|
|
.\" must display the following acknowledgement:
|
||
|
|
.\" This product includes software developed by the University of
|
||
|
|
.\" California, Berkeley and its contributors.
|
||
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
||
|
|
.\" may be used to endorse or promote products derived from this software
|
||
|
|
.\" without specific prior written permission.
|
||
|
|
.\"
|
||
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
.\" SUCH DAMAGE.
|
||
|
|
.\"
|
||
|
|
.\" @(#)vnconfig.8 8.1 (Berkeley) 6/5/93
|
||
|
|
.\" from: src/usr.sbin/vnconfig/vnconfig.8,v 1.19 2000/12/27 15:30:29
|
||
|
|
.\"
|
||
|
|
.\" $FreeBSD$
|
||
|
|
.\"
|
||
|
|
.Dd December 31, 2000
|
||
|
|
.Dt MDCONFIG 8
|
||
|
|
.Os FreeBSD 5
|
||
|
|
.Sh NAME
|
||
|
|
.Nm mdconfig
|
||
|
|
.Nd configure and enable memory disks
|
||
|
|
.Sh SYNOPSIS
|
||
|
|
.Nm
|
||
|
|
.Fl a
|
||
|
|
.Fl t Ar type
|
||
|
|
.Op Fl o Ar [no]option
|
||
|
|
.Op Fl s Ar size
|
||
|
|
.Op Fl f Ar file
|
||
|
|
.Op Fl u Ar unit
|
||
|
|
.Nm
|
||
|
|
.Fl d
|
||
|
|
.Fl u Ar unit
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
The
|
||
|
|
.Nm
|
||
|
|
command configures and enables
|
||
|
|
.Xr md(4)
|
||
|
|
devices.
|
||
|
|
.Pp
|
||
|
|
Options indicate an action to be performed:
|
||
|
|
.Bl -tag -width indent
|
||
|
|
.It Fl a
|
||
|
|
Attach a memory disk. This will configure and attach a memory disk with the
|
||
|
|
parameters specified and attach it to the system.
|
||
|
|
.It Fl d
|
||
|
|
Dettach a memory disk from the system and release all resources.
|
||
|
|
.It Fl t
|
||
|
|
Select the type of the memory disk.
|
||
|
|
.Bl -tag -width indent
|
||
|
|
.It Ar malloc
|
||
|
|
Storage for this type of memory disk is allocated with
|
||
|
|
.Xr malloc 9 .
|
||
|
|
This limits the size to the malloc bucket limit in the kernel.
|
||
|
|
.It Ar preload
|
||
|
|
This type represents memory disks which were instantiated by objects loaded
|
||
|
|
by the bootloader. They can not be created on the fly.
|
||
|
|
.It Ar vnode
|
||
|
|
A file specified with
|
||
|
|
.Fl f Ar file
|
||
|
|
becomes the backingstore for this memory disk.
|
||
|
|
.It Ar swap
|
||
|
|
swapspace is used to back this memory disk.
|
||
|
|
.El
|
||
|
|
.It Fl f Ar file
|
||
|
|
Filename to use for the vnode type memory disk.
|
||
|
|
.It Fl s Ar size
|
||
|
|
Size of the memory disk.
|
||
|
|
.Ar Size
|
||
|
|
is the number of 512 bytes sectors unless suffixed with a 'k', 'm', or 'g' which
|
||
|
|
denotes kilobyte, megabyte and gigabyte respectively.
|
||
|
|
.It Fl o Ar [no]option
|
||
|
|
Set or reset options.
|
||
|
|
.Bl -tag -width indent
|
||
|
|
.It Ar [no]reserve
|
||
|
|
Allocate and reserve all needed storage from the start, rather than as needed.
|
||
|
|
.It Ar [no]cluster
|
||
|
|
Enable clustering on this disk.
|
||
|
|
.It Ar [no]autounit
|
||
|
|
Automatically allocate the next free unit number for this disk.
|
||
|
|
The basename of the disk is printed on stdout.
|
||
|
|
.It Ar [no]compress
|
||
|
|
Enable/Disable compression features to reduce memory usage.
|
||
|
|
.El
|
||
|
|
.El
|
||
|
|
.Sh EXAMPLES
|
||
|
|
.Pp
|
||
|
|
To create a 4 megabyte malloc(9) backed memory disk.
|
||
|
|
The name of the allocated unit will be output on stdout like ``md3'':
|
||
|
|
.Pp
|
||
|
|
.Dl mdconfig -a -t malloc -s 4m
|
||
|
|
.Pp
|
||
|
|
To create a disk named
|
||
|
|
.Pa /dev/md4
|
||
|
|
with
|
||
|
|
.Pa /tmp/boot.flp
|
||
|
|
as backing:
|
||
|
|
.Pp
|
||
|
|
.Dl mdconfig -a -t vnode -f /tmp/boot.flp -u 4
|
||
|
|
.Pp
|
||
|
|
To dettach and free all resources used by
|
||
|
|
.Pa /dev/md4 :
|
||
|
|
.Pp
|
||
|
|
.Dl mdconfig -d -u 4
|
||
|
|
.Pp
|
||
|
|
To create and mount a 128MByte swap backed filesystem on
|
||
|
|
.Pa /tmp :
|
||
|
|
.Pp
|
||
|
|
.Dl mdconfig -a -t swap -s 128M -u 10
|
||
|
|
.Dl disklabel -r -w md10 auto
|
||
|
|
.Dl newfs -f 4096 /dev/md10c
|
||
|
|
.Dl tunefs -n enable /dev/md10c
|
||
|
|
.Dl mount /dev/md10c /tmp
|
||
|
|
.Sh SEE ALSO
|
||
|
|
.Xr md 4 ,
|
||
|
|
.Xr disklabel 8 ,
|
||
|
|
.Xr fdisk 8 ,
|
||
|
|
.Xr malloc 9 .
|