The following graph shows the overall performance of the NAS in all tests we conducted using our custom-made software.
With RAID 6, transfer speeds were low and things got even worse with encrypted file transfers as performance there was crippled not only with RAID 6, but in every other configuration we tried. The APM SoC obviously doesn't feature a hardware-encryption engine, so if you plan on using encrypted volumes, you had also better be patient or simply choose another NAS with a CPU that includes a hardware-encryption engine.
Now let's check the performance of the N4310 against other NAS devices.
The weak SoC made conducting our multi-client tests properly impossible. As our multi-client methodology dictates for NAS servers that support four HDDs or more, we made a point of using a RAID 6 configuration, and the NAS froze up every time we started these tests. The N2310 with a lower-clocked SoC was able to run the multi-client tests with up to three clients, though, which was probably due to the fact that it can only take up to two HDDs in RAID 1, and RAID 1 isn't nearly as demanding as RAID 6.