Performance - Write
Just as I was surprised at the TeraStation's performance when I compared it to the 10/100 LinkStation, I was surprised again when comparing the Giga's results against both the 10/100 LinkStation and TeraStation.
As I do with all NAS testing, I used IOzone to check out the Giga's file system performance (the full testing setup and methodology are described on this page). I ran the 100Mbps test with the Giga and computer running IOzone connected via a 10/100 switch, then moved them to a NETGEAR GS108 10/100/1000Mbps switch for gigabit-speed testing.
Finally, since the GS108 doesn't support Jumbo Frames, I moved the Giga and computer over to the ASUS RX3141 router I recently tested for the jumbo frame test. The only jumbo frame setting that the Intel PRO/1000 MT Desktop gigabit Ethernet adapter and the Giga had in common was 4K (4088 Bytes on the Intel adapter and 4100 on the Giga to be precise), so that's what I used.
• Gigabit LinkStation firmware version tested was 1.34
• Keep in mind that the maximum raw data rate for 100Mbps Ethernet is 12500 kBytes/sec and 125000 kBytes/sec for gigabit
Figure 7 shows a 3D surface plot of the Giga's write performance using file sizes from 64 kBytes to 128MBytes and record sizes from 4 kBytes to 16MBytes. Note that the plot is oriented so that larger file sizes are closer to the front. The peak speeds well above the Ethernet maximum are produced due to both Windows OS and NAS caching and buffering.
Figure 7: Giga LinkStation Write performance - 100 Mbps LAN
(click image to enlarge)
Figure 8 shows the IOzone results using the same test setup, but with a 160GB 10/100 LinkStation. The Y axes are not to the same scale, but you can see that the Giga's peak speeds are well above those of the 10/100 LinkStation, most likely due to the Giga's speedier processor and increased memory.
As a further point of comparison, Figure 9 shows write performance of the TeraStation in its default span mode. Even though the Giga and TeraStation have the same processor and memory, the Giga (and 10/100 LinkStation) both handily beat the TeraStation.