mdadm : description
tool to administer Linux MD arrays (software RAID)
The mdadm utility can be used to create, manage, and monitor MD
(multi-disk) arrays for software RAID or multipath I/O.
This package automatically configures mdadm to assemble arrays during the
system startup process. If not needed, this functionality can be disabled.
Canonical provides critical updates for mdadm until October 2010.

