Desktop hard drive memory capacity 1 tb form factor 35 inch rpms 5 400 rpm buffer 64 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 110 mbs sector size 512e sectors manufacturers guarantee 36 months noise level operating 22 db noise level idle 21 db power consumption operating 33 watt power consumption idle