The ThinkStation 2TB/ 3TB/ 4TB 7200rpm 3.5” SATA 6Gbps Hard Drives for ThinkStation S/D/C30 and E32 systems to extend your systems with big capacity and good compatibility. - 1TB-per-disk hard drive technology - 7200 RPM spindle speed - 64MB cache - SATA 6Gb/s interface optimizes burst performance - Average Data Rate, Read/Write: 158 MB/s - Max Sustained Data Rate: 210MB/s