Seagate Cheetah 15K.4, Cheetah. Hard drive capacity: 146 GB, Hard drive size: 88.9 mm (3.5 "), Hard drive rotational speed: 15000 RPM. Weight: 0.68 kg, Height: 25.4 mm, Width: 101.6 mm. Operating temperature range (T-T): 5 - 55 °C