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RAID level-6 example
Start with six physical drives.
Create a logical drive using four physical drives, leaving two for hot spare drives.
The data is striped across the drives, creating blocks in the logical drive. The
storage of the data parity (denoted by * and **) is striped, and it shifts from drive
to drive as it does in RAID level-5.
If a physical drive fails in the array, the logical drive is degraded but remains fault
tolerant.
If a second physical drive fails in the array, the data from the failed drives are
reconstructed onto the hot-spare drives, and the data for the logical drive return to
the original striping scheme.
44 ServeRAID Manager Installation and User's Guide