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Performance

I used IOzone to check out the file system performance on the 4100P (the full testing setup and methodology are described on this page). Thecus supplied the product with four 160 GB Western Digital Caviar Blue hard drives (WD1600AAJS, 3 Gb/s, 8 MB Cache, 7200 RPM). My test unit had the latest 2.01.04 firmware and I used default RAID settings, which included a 64 KB stripe size.

I ran tests with the 4100P configured in RAID 0, 5 and 10 modes, with 100 Mbps, 1000 Mbps and 1000 Mbps w/ 4K jumbo frame LAN connection.

Figure 7 shows a summary of the product's large filesize write test results with 1000 Mbps and 1000 Mbps w/ 4K jumbo frame LAN connections. I didn't bother plotting 100 Mbps results, because they are held back by the slower LAN speed.

RAID 5 seems to get the least benefit from using jumbo frames and RAID 0 and 10 about the same. Average write speed across the large file sizes came in at 23.5, 18.7 and 23.9 MB/s for RAID 0, 5 and 10 respectively with the gigabit connection and 27.5, 20.4 and 24.5 MB/s for 4k jumbo frames.

N4100 Pro write benchmark comparison

Figure 7: N4100 Pro write benchmark comparison

Figure 8 shows large filesize read results, which are harder to follow. But it seems like read performance benefits much less from jumbo frames than the write.

Average read speed across the large file sizes came in at 43.3, 39.0 and 41.6 MB/s for RAID 0, 5 and 10 respectively with the gigabit connection and 44.4, 40.3 and 41.2 MB/s for 4k jumbo frames. The plots show that Reads not only reach higher maximum speeds in the 50 MB/s range, but stay up longer than writes.

N4100 Pro read benchmark comparison

Figure 8: N4100 Pro read benchmark comparison

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