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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 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, or RAID 1+0. |