15 August 2010
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RAID 6 | Striping with Double Distributed Parity
RAID Level 6
RAID Level 6 - (4 Drive Minimum - Redundancy Through Parity) Block-Level Striping with Double Distributed Parity: Very similar to RAID 5, RAID 6 builds on the security of RAID 5 by adding an additional level of redundancy. In a RAID 6 up to two drives can fail and no data will be lost. RAID 6 makes very large arrays possible, where the time it takes to rebuild the array after a drive failure can be quite lengthy. In a RAID 5 scenario data would be vulnerable for far too long while the rebuild is in progress. RAID 6 addresses this concern by adding an additional redundancy drive. RAID 6 is the solution that should be used where data is extremely critical or high system availability is important.