RAID levels comparison in Hiatchi VSP storage systems

RAID‐10 RAID‐5 RAID‐6
Description Data Striping +(plus) Mirroring Data Striping with +(plus) distributed parity Data Striping with two distributed parities
Disk count 4 (or) 8 4 (or) 8 8
Advantages Highest performance with data redundancy; higher write IOPS per Parity Group than with similar RAID‐5. The best balance of reliability, cost and performance. Balance of cost, with extreme emphasis on reliability
Disadvantages Higher cost per number of physical disks Performance penalty for high percentage of Random Writes Performance penalty for all writes

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