RAID LEVEL 50: High I/O Rates & Data Transfer Performance

RAID Level 50 requires a minimum of 6 drives to implement

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Characteristics & Advantages

  • RAID 50 should have been called "RAID 03" because it was implemented as a striped (RAID level 0) array whose segments were RAID 3 arrays (during mid-90s)
  • Most current RAID 50 implementation is illustrated above
  • RAID 50 is more fault tolerant than RAID 5 but has twice the parity overhead
  • High data transfer rates are achieved thanks to its RAID 5 array segments
  • High I/O rates for small requests are achieved thanks to its RAID 0 striping
  • Maybe a good solution for sites who would have otherwise gone with RAID 5 but need some additional performance boost

Disadvantages

  • Very expensive to implement
  • All disk spindles must be synchronized, which limits the choice of drives
  • Failure of two drives in one of the RAID 5 segments renders the whole array unusable
 
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