IBM 900GB 2.5" 10k 6Gb/s SAS. Hard drive capacity: 900 GB, Hard drive size: 63.5 mm (2.5 "), Hard drive rotational speed: 10000 RPM. Operating temperature range (T-T): 5 - 60 °C, Storage temperature range (T-T): -20 - 60 °C, Operating relative humidity range: 5 - 90 %