Output Noise

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

Output Noise Comparison Graphs

The following graphs show the output noise of the DS1819+ and compare it to that of other units we have tested in the past.

Performance Rating

The following graph shows the NAS server's total performance rating, comparing it to other units. The comparison is pretty straightforward as the tested unit is shown as 100% and every other unit is relative to it. Please note that we only measure the raw performance in the graph below, not each unit's functionality and available feature set.