dkctl(8) - NetBSD Manual Pages

DKCTL(8)                NetBSD System Manager's Manual                DKCTL(8)


NAME

     dkctl -- program to manipulate disks


SYNOPSIS

     dkctl device command [arg [...]]


DESCRIPTION

     dkctl allows a user or system administrator to manipulate and configure
     disks in various ways.  It is used by specifying a disk to manipulate,
     the command to perform, and any arguments the command may require.


COMMANDS

     The following commands are supported:

     getcache        Get and display the cache enables for the specified
                     device.

     setcache none | r | w | rw [save]
                     Set the cache enables for the specified device.  The
                     enables are as follows:

                           none    Disable all caches on the disk.

                           r       Enable the read cache, and disable all
                                   other caches on the disk.

                           w       Enable the write cache, and disable all
                                   other caches on the disk.

                           rw      Enable both the read and write caches on
                                   the disk.

                           save    If specified, and the cache enables are
                                   savable, saves the cache enables in the
                                   disk's non-volatile parameter storage.

     synccache [force]
                     Causes the cache on the disk to be synchronized, flushing
                     all dirty write cache blocks to the media.  If force is
                     specified, the cache synchronization command will be
                     issued even if the kernel does not believe that there are
                     any dirty cache blocks in the disk's cache.

     keeplabel [yes | no]
                     Specify to keep or drop the in-core disklabel on the last
                     close of the disk device.  (Keep if yes is specified,
                     drop if no is specified.)

     badsector flush | list | retry
                     Used for managing the kernel's bad sector list for wd(4)
                     devices.  The software bad sector list is only maintained
                     if the option ``WD_SOFTBADSECT'' was specified on kernel
                     configuration.

                           flush    Clears the in kernel list of bad sectors.

                           list     Prints out the list of bad sector ranges
                                    recorded by the kernel.

                           retry    Flushes the in kernel list and then
                                    retries all of the previously recorded bad
                                    sectors, causing the list to self update.
                                    This option can only be used with charac-
                                    ter devices.

     addwedge name startblk blkcnt ptype
                     Define a ``wedge'' on the specified disk starting at
                     block number startblk and spanning blkcnt blocks.  The
                     wedge will have the volume name name and the partition
                     type ptype.  The device name of the virtual block device
                     assigned to the wedge will be displayed after the wedge
                     has been successfully created.  See dk(4) for more infor-
                     mation about disk wedges.

     delwedge dk     Delete the wedge specified by its device name dk from the
                     specified disk.

     getwedgeinfo    Display information about the specified disk wedge.

     listwedges      List all of the wedges configured on the specified disk.


SEE ALSO

     ioctl(2), dk(4), sd(4), wd(4), disklabel(5), atactl(8), scsictl(8)


HISTORY

     The dkctl command first appeared in NetBSD 1.6.


AUTHORS

     The dkctl command was written by Jason R. Thorpe of Wasabi Systems, Inc.

NetBSD 3.1                    September 25, 2004                    NetBSD 3.1