Western Digital VelociRaptor 600GB. Hard drive capacity: 600 GB, Hard drive interface: Serial ATA II, Hard drive speed: 10000 RPM. Power consumption (standby): 0.70 W, Power consumption (read): 6.20 W, Power consumption (write): 6.20 W. Width: 4" (101.6 mm), Height: 1.03" (26.1 mm), Depth: 5.79" (147 mm). Power requirements: 12V, Data transfer rate: 6 Gbit/s, Compatible operating systems: Windows 7/Vista/XP/2000, Windows servers Linux Mac OS