Read operations on a failed disk unit

 

To access the data that was contained on a failed disk unit, device parity protection must read each disk unit in the parity set that contains the failed disk unit.

Because the read operations can be overlapped, the performance affect may be small.

Because a failed disk unit with device parity protection may contain only a small portion of user data, it is possible that only a few users will be affected by the decrease in performance.

RAID 6 operations are derived from RAID 5, but at a further level of complexity. Because the concept is similar to RAID 5, RAID 6 operations are not described.

 

Parent topic:

RAID 5 concepts