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lsraid



SYNOPSIS

           lsraid -A [-g|-s|-f] {-a <device> | -d <device>} ...
           lsraid -A -p
           lsraid -D [-l] {-a <device> | -d <device>} ...
           lsraid -D -p
           lsraid -R {-a <device> | -d <device>} ...
           lsraid -R -p
           lsraid -h
           lsraid -V


DESCRIPTION

       lsraid is a program for querying Linux md devices.  It can
       describe the composite device and the block devices that
       belong to it.  It can also provide a description of the md
       device suitable for including in the /etc/raidtab configu­
       ration file.

       lsraid also has the ability to operate on online and
       offline devices.  It can read an online device via the
       kernel interface and provide information about it.  When a
       device is offline, lsraid can look at any of the block
       devices that are a part of the md device and read the per­
       sistent md superblock for information.


OPTIONS

       -A  Selects array-based operation.  lsraid will query the
           given devices and output a short listing of the refer­
           enced md devices.

       -a <device>
           Adds md device <device> to the list of devices to
           query.  If the device is online, lsraid will discover
           all of the block devices that belong to it via the
           kernel interface.  Otherwise lsraid will only be able
           to verify that the device exists.

       -D  Selects disk-based operation.  lsraid will query the
           given devices and then output a description of all the
           member disks requested.

       -d <device>
           Adds block device <device> to the list of devices to
           query.  lsraid will read the md superblock off of
           <device> and use it to discover the assocated md
           device and block devices.

       -f  Displays only failed block devices in array-based mode
           (-A).

       -g  Displays only good block devices in array-based mode
           (-A).

       -R  Selects raidtab operation.  lsraid will query all the
           devices specified and output a description of the ref­
           erenced md devices in a format suitable for placing in
           a raidtab(5) file.

       -s  Displays only spare block devices in array-based mode
           (-A).


NOTES

       lsraid cannot discover the block devices that make up an
       offline md device.  Providing one of the member devices
       with the -d option allows lsraid to discover the rest of
       the information about the offline md device.

       Disk-based operation only displays the block devices spec­
       ified on the command line.  Specify the md device on the
       command line to see information about all of the member
       disks.  If the md device is offline, specify both the md
       device and one of the member disks.

       lsraid does not do any special handling of md devices com­
       posed of other md devices (eg RAID 1+0).  The member
       devices are merely treated as block devices while in the
       context of the parent device.  This is only an issue for
       raidtab-based operation.  The raidtab(5) output will be
       printed in the order the md devices are queried.  This
       means that a command creating a raidtab(5) for a RAID 1+0
       device should list the member devices first on the command
       line.


EXAMPLES

       lsraid -A -a /dev/md0
           Display a short listing of the md0 device.

       lsraid -A -d /dev/sda1
           Display a short listing of the array that sda1 belongs
           to.

       lsraid -A -f -a /dev/md0
           Display the failed devices belonging to the md0
           device.

       lsraid -D -l -a /dev/md0
           Display a long dump of the on-disk md superblock of
           every disk in md0.

       lsraid -D -a /dev/md0 -d /dev/sda1
           Display a short discription of the disks in md0 as
           well as a short description of the disk sda1.  sda1
           will only be described once if it belongs to md0.



SEE ALSO

       mkraid(8), raidtab(5), raidstart(8), raidstop(8)


VERSION

       lsraid version 0.7.0 (26 March 2002)


HISTORY

       Version 0.7.0
           Added scanning of active block device partitions.

       Version 0.4.0
           Initial documented version.  Functionally complete.


AUTHOR

       Joel Becker    <joel.becker@oracle.com>


COPYRIGHT

       Copyright © Oracle Corporation, Joel Becker.  All rights
       reserved.

       This program is free software; see the file COPYING in the
       source distribution for the terms under which it can be
       redistributed and/or modified.

0.7.0                       2002-03-26                  LSRAID(8)
  
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