HGST C10K1200 1200GB 20 Pack, Ultrastar. Hard drive capacity: 1200 GB, Hard drive interface: SAS, Hard drive speed: 10000 RPM. Power consumption (read): 6.7 W, Power consumption (write): 6.7 W, Power consumption (idle): 3.7 W. Width: 2.76" (70.1 mm), Height: 0.583" (14.8 mm), Depth: 3.96" (100.6 mm). Data transfer rate: 6 Gbit/s