Hardware / Infrastructure 1.4: Redundant Array of Independent Disks (RAID)

An assembly of disk drives that employ two or more drives in combination for fault tolerance and performance

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An assembly of disk drives that employ two or more drives in combination for fault tolerance and performance. RAID disk drives are used frequently on servers but aren't generally necessary for personal computers. RAID is generally configured as mirrored or striped. Mirrored RAID (Level 1) provides a failover drive. Striped RAID (Levels 0, 3, and 5) write data across multiple disk drives so that a single disk failure can be recovered from the data on the remaining drives. There are three (3) types of RAID systems: failure resistant disk systems (that protect against data loss due to disk failure), failure tolerant disk systems (that protect against loss of data access due to failure of any single component), and disaster tolerant disk systems (that consist of two or more independent zones, either of which provides access to stored data).

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Indicator:1

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