Hitachi Ultrastar 15K300 300GB Ultra320 SCSI, Ultrastar. Hard drive capacity: 300 GB, Hard drive size: 88.9 mm (3.5 "), Hard drive rotational speed: 15000 RPM. Weight: 745 g, Height: 25.8 mm, Width: 101.6 mm. Operating temperature range (T-T): 5 - 55 °C, Storage temperature range (T-T): -40 - 70 °C