July 2011 | 18 pages

Abstract: The explosive growth of fixed content combined along with hard disk drive capacity is exposing serious limitations in RAID (Redundant Array of Independent Disks) turning a once dependable data method into a problem waiting to happen. This paper presents why RAID increases risk of data loss, impacts I/O performance, is expensive to upgrade, is slow to rebuild and doesn’t always utilize capacity efficiently. A solution using replication vs RAID is presented.