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Fault Tolerance and Fault Tolerant Logical Drive

Fault Tolerance

The capacity to cope with internal hardware problems without interrupting data availability, often by using backup systems brought online when a failure is detected. Many storage systems provide fault tolerance by using RAID architecture to give protection against data loss when a single disk drive fails. Using RAID 1 (mirroring), RAID 3 or 5 (striping with parity), or RAID 6 or 1+0 (mirroring and striping) techniques, the array controller can reconstruct data from a failed drive and write it to a standby or replacement drive.

Fault Tolerant Logical Drive

A logical drive that provides protection of data in the event of a single drive failure by using RAID 1, 3, 5, and 6 (also known as RAID 1+0).

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