redundancy (data)
Additional information stored along with user data that enables a controller to reconstruct lost data. Redundant Array of
Independent Disks (RAID) Level 1 uses mirroring for redundancy. RAID Level 3, RAID Level 5, and RAID Level 6 use redundancy
information, sometimes called parity, that is constructed from the data bytes and is striped along with the data on each disk
drive.