Nas drive memory capacity 4 tb form factor 35 inch rpms 5 400 rpm buffer 64 mb bus sata iii sata 600 intellipower 5400 7200 rpm range series western digital red special feature ncq support suitable for 24 hour continuous operation nas systems charge and discharge cycles 600 000 data transfer rate 150 mbs connections 15 pin power connection access time 168 ms mtbf 1 000 000 hours technology intellipower sector size 512e sectors manufacture