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Performance - Benchmark Comparison

I put the 343 through our standard NAS Chart tests in JBOD and RAID 5 modes with 100 Mbps, 1000 Mbps and 1000 Mbps w/ 4k jumbo frame LAN connections. To ensure connection at the intended speeds, the iozone test machine and the 343 were manually moved between a NETGEAR GS108 10/100/1000Mbps switch for gigabit-speed testing and a 10/100 switch for 100 Mbps testing.

NOTES:

  • Firmware version tested was 1.01
  • Drives used were four Hitachi Deskstar HDS721680PLA380 80GB 7200RPM 3.0 Gb/s SATA hard drives with 8MB of cache supplied by D-Link
  • Keep in mind that the maximum raw data rate for 100Mbps Ethernet is 12500 Kbytes/sec and 125000 Kbytes/sec for gigabit

I first used the Compare Benchmark chart feature to plot throughput vs. file size for the various benchmark tests. Figures 7 and 8 show the 1000 Mbps and 1000 Mbps w/ 4k jumbo frames Write and Read results respectively.

Write performance is remarkably flat, showing no sign of the write caching at smaller filesizes that we typically see. And jumbo frames make a big difference in performance, more in JBOD than in RAID 5. But, most significantly, going from JBOD to RAID 5 will cut throughput about in half.

1000 Mbps Write benchmark comparison

Figure 7: 1000 Mbps Write benchmark comparison

For read, jumbo frames don't make much difference. But you again see a significant—but not 50%—throughput reduction going from JBOD to RAID 5.

1000 Mbps Read benchmark comparison

Figure 8: 1000 Mbps Read benchmark comparison

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