Lenovo Thinkserver 4XB0K12278, Hard drive - hot-swap, Capacity 2 TB, FF 3.5", SAS 12Gb/s, Interface 1 x SAS 12 Gb/s, Drive Transfer Rate 1.2 GBps (external), Speed 7200 rpm. ThinkServer always meets the demand on performance enhancement and feature enablement by continuous improvement on products and options.