HGST He10 10TB, Ultrastar. Hard drive capacity: 10000 GB, Hard drive interface: SAS, Hard drive speed: 7200 RPM. Power consumption (typical): 9.5 W, Power consumption (idle): 5.8 W, Input voltage: 5/12. Width: 4" (101.6 mm), Height: 1.03" (26.1 mm), Depth: 5.79" (147 mm)