id array

Redundant Array of Independent Disks. A RAID Array consists of multiple hard disk drives that behave as one. Depending upon their configuration, RAID Arrays can offer redundant backup (RAID 1 whereby data is written to each disk identically, so the content is mirrored) or non-redundant backup (RAID 0 whereby the disks are connected and offer an increased speed and capacity, but data is only written once).