Support for Software RAID-0 and RAID-1

The ability to enable software RAID-0 (striping) on client nodes or software RAID-1 (mirroring) on the head node and client nodes has been added in this release.

Software RAID-0 enables client nodes that have more than one storage disk to split data evenly across the disks. Striping is typically used to increase performance. However, because there is no parity information for redundancy, reliability is reduced. A single disk failure affects both disks. Software RAID-0 is not supported on the head node.

Software RAID-1 enables nodes that have more than one storage disk to increase reliability by maintaining a redundant (mirrored) disk copy. When a node is imaged with RAID-1 support, the entire disk is mirrored. If a disk fails, nodes can continue to run using the other disk.

The procedure that describes how to enable software RAID is documented in the HP XC System Software Installation Guide.