Toshiba MK2556GSY. Hard drive capacity: 250 GB, Hard drive size: 63.5 mm (2.5 "), Hard drive rotational speed: 7200 RPM. Power consumption (read): 2.1 W, Power consumption (write): 2.1 W, Power consumption (idle): 0.16 W. Weight: 97 g, Height: 9.5 mm, Width: 69.85 mm. Operating temperature range (T-T): 5 - 55 °C, Operating shock: 325 G, Non-operating shock: 900 G. Certification: RoHS