Hitachi Travelstar, 320GB, Travelstar. Hard drive capacity: 320 GB, Hard drive size: 63.5 mm (2.5 "), Hard drive rotational speed: 7200 RPM. Power consumption (standby): 0.2 W, Power consumption (read): 1.8 W, Power consumption (write): 1.8 W. Width: 70 mm, Depth: 100 mm