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RAID Benchmark Results

Will SSDs Take Over The Enterprise?
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This section includes the benchmark results of eight MemoRight flash SSDs versus eight Seagate Savvio 10K.2 drives and eight Seagate Cheetah 15K.5 drives in RAID. We tried RAID 0, RAID 1+0, RAID 5 and RAID 6.

Access Time

The access time of the MemoRight flash SSDs did not change much when running in a RAID array with eight hard drives. Despite the doubled time of 0.2 ms as opposed to 0.1 ms for individual hard drives, the flash SSD array is still superior to mechanical drives. The same applies to the conventional hard drives. Access time is similar in RAID and for individual units.

Interface Performance

Interface performance is only interesting for determining the maximum throughput. In the case of the Areca ML1680 controller, the host adapter clearly limits the throughput, as eight drives at over 100 MB/s each should be capable of reaching around 800 MB/s in a RAID 0 configuration. We tried this with Adaptec’s 5 series RAID card and we received even better throughput, which, as expected, was dominated by the Cheetah 15K.5 drives.

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