Nas drive capacity 250 gb form factor 35 inch rpms 7 200 rpm buffer 64 mb bus sata iii sata 600 series western digital raid edition re special feature ncq support suitable for 24 hour continuous operation nas systems video surveillance systems mtbf 1 200 000 hours manufacturers guarantee 60 months noise level operating 30 db noise level idle 27 db power consumption operating 65 watt power consumption idle 44 watt height 261 mm