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RAID 10 concepts

RAID 10 protection protects data from being lost because of a disk unit failure or because of damage to a disk. RAID 10 protection provides a level of protection comparable to device level mirroring.

RAID 10

RAID 10 protects availability due to disk unit failure by pairing disks together into logical mirrors. Each pair of disks is considered a parity set. In addition to being logically mirrored, RAID 10 also uses block-level striping. RAID 10 protection is effectively the combination of RAID 0 (data striping) and RAID 1 (disk mirroring).

A complete restore of ASP data is only required if both disks in the parity set fail. If both disks in the parity set fail, you must restore the data from the backup media.

Input/output adapter caching greatly enhances both the read and write performance characteristics in a RAID 10 configuration. Non-cached read operations are distributed between the two disks in the parity set reducing the workload on each disk. Non-cached write operations (write-cache overruns) require a write operation by the adapter to each disk in the parity set to complete the write operation.

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