Redundancy

Redundancy is additional information stored along with the data that allows the controller to reconstruct lost data.

RAID 1 uses mirroring for redundancy. RAID 3 and RAID 5 use redundancy information, sometimes called parity, that is constructed from the data bytes and striped along with the data on each disk.

A redundancy check, performed using the Array >> Check Redundancy option:

-OR-

See Performing a Redundancy Check.