RAID 0+1 Pros: Pros: Pros: (striped Two data loss loss mirrors) sources for and and often every read multiple multiple request (up to losses (in losses (in 100% large large performance configurations configurations Four-disk are do not minimum. . survivable. prevent Balanced access. load. Potential for better response times, throughput, Cons: and Twice the concurrency. cost of RAID 0 or Cons: JBOD. Writes must to 2X update power mirrors. Difficult stripe unit size choice.
RAID 0+1 (striped mirrors) Four-disk minimum. Pros: Two data sources for every read request (up to 100% performance Balanced load. Potential for better response times, throughput, and concurrency. Cons: Writes must update mirrors. Difficult stripe unit size choice. Pros: loss and multiple losses (in large are survivable. Pros: loss and often multiple losses (in large do not prevent access. Cons: Twice the cost of RAID 0 or JBOD. to 2X power . configurations configurations
Perf-tun-srv-R2.docx