169 lines
5.3 KiB
Groff
169 lines
5.3 KiB
Groff
.\" $NetBSD: dkctl.8,v 1.17 2006/01/12 20:28:29 wiz Exp $
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.\"
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.\" Copyright 2002 Wasabi Systems, Inc.
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.\" All rights reserved.
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.\"
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.\" Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed for the NetBSD Project by
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.\" Wasabi Systems, Inc.
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.\" 4. The name of Wasabi Systems, Inc. may not be used to endorse
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.\" or promote products derived from this software without specific prior
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.\" written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd December 26, 2005
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.Dt DKCTL 8
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.Os
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.Sh NAME
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.Nm dkctl
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.Nd program to manipulate disks
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.Sh SYNOPSIS
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.Nm
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.Ar device
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.Ar command
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.Op Ar arg Op ...
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.Sh DESCRIPTION
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.Nm
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allows a user or system administrator to manipulate and configure disks
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in various ways.
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It is used by specifying a disk to manipulate, the command
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to perform, and any arguments the command may require.
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.Sh COMMANDS
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The following commands are supported:
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.Bl -tag -width XXstrategyXXnameXX
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.It Ic getcache
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Get and display the cache enables for the specified device.
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.It Ic setcache Ar none | r | w | rw Op Ar save
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Set the cache enables for the specified device.
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The enables are as follows:
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.Bl -tag -offset indent -width XsaveX
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.It none
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Disable all caches on the disk.
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.It r
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Enable the read cache, and disable all other caches on the disk.
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.It w
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Enable the write cache, and disable all other caches on the disk.
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.It rw
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Enable both the read and write caches on the disk.
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.It save
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If specified, and the cache enables are savable, saves the cache
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enables in the disk's non-volatile parameter storage.
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.El
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.It Ic synccache Op Ar force
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Causes the cache on the disk to be synchronized, flushing all dirty
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write cache blocks to the media.
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If
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.Ar force
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is specified, the cache synchronization command will be issued even
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if the kernel does not believe that there are any dirty cache blocks
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in the disk's cache.
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.It Ic keeplabel Op Ar yes | no
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Specify to keep or drop the in-core disklabel on the last close of
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the disk device.
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(Keep if
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.Ar yes
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is specified, drop if
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.Ar no
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is specified.)
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.It Ic badsector Ar flush | list | retry
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Used for managing the kernel's bad sector list for
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.Xr wd 4
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devices.
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The software bad sector list is only maintained if the option
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.Dq WD_SOFTBADSECT
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was specified on kernel configuration.
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.Bl -tag -width XflushXX -offset indent
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.It flush
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Clears the in kernel list of bad sectors.
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.It list
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Prints out the list of bad sector ranges recorded by the kernel.
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.It retry
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Flushes the in kernel list and then retries all of the previously recorded
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bad sectors, causing the list to self update.
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This option
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.Em can only
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be used with character devices.
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.El
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.It Ic addwedge Ar name Ar startblk Ar blkcnt Ar ptype
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Define a
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.Dq wedge
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on the specified disk starting at block number
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.Ar startblk
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and spanning
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.Ar blkcnt
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blocks.
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The wedge will have the volume name
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.Ar name
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and the partition type
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.Ar ptype .
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The device name of the virtual block device assigned to the wedge will be
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displayed after the wedge has been successfully created.
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See
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.Xr dk 4
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for more information about disk wedges.
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.It Ic delwedge Ar dk
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Delete the wedge specified by its device name
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.Ar dk
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from the specified disk.
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.It Ic getwedgeinfo
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Display information about the specified disk wedge.
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.It Ic listwedges
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List all of the wedges configured on the specified disk.
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.It Ic strategy Op Ar name
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Get and set the disk I/O scheduler (buffer queue strategy) on the
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drive.
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If you do not provide a
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.Ar name
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argument, the currently selected strategy will be shown.
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To set the bufq strategy, the
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.Ar name
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argument must be specified.
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.Ar name
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must be the name of one of the built-in kernel disk I/O schedulers.
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To get the list of supported schedulers, use the following command:
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.Bd -literal -offset indent
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$ sysctl kern.bufq.strategies
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.Ed
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.El
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.Sh SEE ALSO
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.Xr ioctl 2 ,
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.Xr dk 4 ,
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.Xr sd 4 ,
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.Xr wd 4 ,
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.Xr disklabel 5 ,
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.Xr atactl 8 ,
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.Xr scsictl 8
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.Sh HISTORY
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The
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.Nm
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command first appeared in
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.Nx 1.6 .
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.Sh AUTHORS
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The
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.Nm
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command was written by
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.An Jason R. Thorpe
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of Wasabi Systems, Inc.
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