Lenovo SAS Drives (00WG695), 900GB, Serial Attached SCSI 3 (SAS), Internal, HDD FF 2.5 inches, 10000RPM, 1.2GB/s. This 10K RPM 12 Gb/s 2.5-inch Hot-Swap SAS drive offers the highest performance. It has outstanding reliability that enables operation in RAID environments without compromising application performance or availability.