Lenovo 00NA271, Capacity 1.8TB, Interface Serial Attached SCSI 3 (SAS), HDD 2.5 inches, Spindle Speed 10000RPM, Data Transfer Rate 1.2GB/s, Hot Swap. This 10K RPM 12 Gb/s 2.5-inch 512e Hot-Swap SAS drive offers the highest performance. It has outstanding reliability that enables operation in RAID environments without compromising application.