Performance - Competitive
It's too bad that I didn't test the Atom-based QNAP TS-439 Pro first so that I could compare the NVX to it. But that will have to wait until the TS-439 Pro review. In the meantime, I compared the NVX against other four-drive recently-tested NASes: the Seagate BlackArmor 440, Buffalo TeraStation III and Cisco NSS3000. I also threw in the NV+ results for good measure.
Figure 8 shows RAID 5 write results. The NVX's high cache values at lower file sizes compress the plots, making it hard to see the rankings below the NVX. You'll have to consult the chart below the plots to see that the Buffalo and Seagate are next behind the NVX with mid-to-low 20 MB/s write speed. Note the NV+'s write speed is about one-fourth that of the NVX.
Figure 8: Competitive RAID 5 write comparison
RAID 5 read performance is compared in Figure 9, where it's much easier to determine the ranking. The shocker here is that the Cisco NSS3000, which was just released this January, is slower than the NV+, which debuted in 2007!