HGST C10K1800, Ultrastar. Hard drive capacity: 900 GB, Hard drive interface: SAS, Hard drive speed: 10000 RPM. Power consumption (typical): 6.2 W, Power consumption (idle): 4.3 W. Width: 2.76" (70.1 mm), Height: 0.591" (15 mm), Depth: 3.95" (100.5 mm)