RAID 50 combines the straight block-level striping of RAID 0 with the distributed parity of RAID 5.
RAID 50 improves upon the performance of RAID 5 particularly during writes, and provides better fault tolerance than a single RAID level does. This level is recommended for applications that require high fault tolerance, capacity and random positioning performance.
Graphical representation of the RAID layout:
Raid Level 50