My main interest in reviewing the LX195 was mainly to see how WHS ran on an Intel Atom platform. Testing was done with latest 188.8.131.52366 firmware and file duplication disabled. I tested with a gigabit Ethernet connection between the 195 and testbed machine and did not test with a jumbo frame connection since HP / WHS don't support enabling it. I also didn't test with a 100 Mbps connection because the gigabit-connected results showed using 100 Mbps would severely limit performance.
Figure 8 shows plots of the write and read performance vs. "large" file sizes from 32 MB to 4 GB with a 1000 Mbps LAN connection. As with the EX MediaSmart, there is significant write cache boost.
Figure 8: Performance benchmarks
However, average performance over the 32 MB to 4 GB file sizes, even with cached results above 125 MB/s removed from the average, comes in at a chart-topping 85.9 MB/s for writes, which beats out both the EX487 at 74 MB/s and the second-place NETGEAR ReadyNAS Pro at 82.6 MB/s.
The results were different for reads, however, with the 195 measuing a significantly lower 61.5 MB/s, vs. 69.7 MB/s for the EX487.
For the competitive comparison, I chose a few recently-reviewed high-performance single-drive NASes, the Synology DS109+ and Buffalo LinkStation XHL. I also included the 195's bigger sibling, the HP MediaSmart EX487, even though it has multiple internal drives, because I wanted to see how the Atom stacked up against the 487's Intel Celeron. Since WHS essentially accesses only one drive at a time in real time anyway, the 195's single drive vs. the 487's multiple drives shouldn't matter.
Figure 9 shows the unusually high caching in both HPs, with the 487's effect even higher than the 195's, most likely due to its 2 GB of RAM vs. the 195's 1 GB. From file sizes 512 MB on up, however, the 195's throughput holds up pretty well, staying above both the Synology and Buffalo NASes.
Figure 9: Competitive write comparison - 1000 Mbps LAN
Figure 10 compares the read performances, where rankings are similar. But note the EX487's extreme throughput fall-off above the 1 GB file size. The Buffalo, with its new Marvell Kirkwood processor still comes in last, with PowerPC-powered Synology and Atom-based LX195 duking it out for second and third places.