RAID 0 Performance
Because I was curious about how fast and how repeatable the DS-500 is, I ran the iozone benchmark tests on the DS-500 stripe array 22 times. The machine that the DS-500 was attached to was a homebuilt box with Foxconn 761GXK8MB-KRS motherboard, SIS 761GX and 965 chipsets, AMD socket 939 with AMD Athlon 64 3200+ processor, 1 GB of RAM and 238 GB SATA hard drive running Win XP.
Each green line in Figures 17 and 18 represents one run of the iozone test. The black line represents the numerical average of the 22 runs.
Figure 17: DS-500 Stripe Write Speed Repeatability
Variation in write speed seemed to me to be low. There did not seem to be any systematic bias where early runs were slower than later runs.
Figure 18: DS-500 Stripe Read Speed Repeatability
The same seemed to be the case in the read speed. The three low data series in Figure 18 were runs 2, 8, and 18 of 22. If the array were formatting itself in the background (LSI Logic's MegaRAID hardware cards for example, define the array and then format it in the background) I would expect speeds to start low and then speed up. This pattern does not seem to be the case.
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