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 24 hour continuous operation video surveillance systems charge and discharge cycles 300 000 data transfer rate 178 mbs sector size 512e sectors manufacturers guarantee 36 months noise level operating 29 db noise level idle 20 db power consumption operating 64 watt power consumption idle