Desktop hard drive memory capacity 8 tb form factor 35 inch rpms 5 400 rpm buffer 128 mb bus sata iii sata 600 series western digital purple suitable for video surveillance systems 24 hour continuous operation charge and discharge cycles 300 000 mtbf 1 000 000 hours technology intellipower sector size 512e sectors manufacturers guarantee 36 months noise level operating 29 db noise level idle 20 db power consumption operating 64 watt powe