RAID LEVEL 50 (RAID 5+0): RAID 0 Array Striped Across RAID 5 Elements

RAID 50, also called RAID 5+0, combines the straight block-level striping of RAID 0 with the distributed parity of RAID 5.
A minimal RAID 50 configuration requires at least 6 drives.

Characteristics & Advantages

  • RAID 50 improves upon the performance of RAID 5 particularly during writes
  • Provides better fault tolerance than a single RAID level.


  • Implementation is very expensive
  • Compared to RAID 5 parity overhead, the RAID 50 overhead is the multiple of the number of RAID 5 segments
  • Failure of two drives in one of the RAID 5 segments renders the whole array unusable

Recommended Applications

  • Applications that require high fault tolerance, capacity and random access performance