Time to Boot and Restart

You won't have to boot or restart a NAS server frequently, but still it can be inconvenient if boot and restart times are too long.

Output Noise

I use a Class 1 Bruel & Kjaer 2250-L G4 sound analyzer equipped with a Type 4955a microphone that features a dBA-weighted dynamic range of below 6 dBA and up to 110 dBA. All tests are conducted inside a hemi-anechoic chamber at 25–28 °C ambient, and the test subject is placed a meter from the sound analyzer.



The NAS has a quiet operation if you have its fan speed profile set at cool or quiet modes. If you try the full fan speed mode, the noise will be increased, as expected.

Output Noise Comparison Graphs

The following graphs show the output noise of the Synology DS923+ and compare it to other units I have tested.