The 10TB gold 7200 RPM SATA III 3.5" internal datacenter HDD from WD delivers 10TB of storage capacity for high-availability servers and storage arrays. This 3.5" drive operates using a SATA III 6 GB/s interface, a 256MB cache, and a rotational speed of 7200 RPM, all of which help to ensure a sustained rate of up to 249 MB/s.