Nas drive memory capacity 4 tb form factor 35 inch rpms 7 200 rpm buffer 64 mb bus sata iii sata 600 series western digital red suitable for nas systems 24 hour continuous operation mtbf 1 000 000 hours manufacturers guarantee 60 months noise level operating 34 db noise level idle 31 db power consumption operating 86 watt power consumption idle 65 watt height 261 mm