Managing RAID on Linux

Name

lsraid

Synopsis

lsraid [mode] [options] -a mddevicelsraid [mode] [options] -d memberdevice

lsraid is included with release 1.0 of raidtools. It allows users to examine arrays and generate /etc/raidtab files by querying active arrays. lsraid is useful for checking devices, diagnosing problems, and recovering lost configuration files. lsraid was written by Joel Becker at Oracle Corporation.

Options

-A

Specifies array mode. Displays information about an array. When combined with the -a option, array mode will query an active array. When combined with the -d option, array mode will read the RAID superblock from a member disk instead of querying the array.

-D

Denotes disk mode. Displays information about member disks. When used with the -a option, disk mode returns information about each array member. When combined with -d, disk mode returns information about the specified member disks.

-R

Specifies raidtab mode. Queries an array or member disk and generates an /etc/raidtab file based on the RAID superblock it finds.

-a device

Selects an active md device to query. If the md device is inactive, lsraid indicates the device major and minor numbers and specifies that the array is offline.

-d device

Selects which block device (member disk) to query. lsraid reads the RAID superblock from the member disk.

-f

When combined with -A, displays only member disks that have failed.

-g

When combined with -A, displays only member disks that are working.

-s

When combined with -A, displays only spare disks in an array. ...