Seagate Constellation ES 2 TB 7200RPM 6 Gb/s SAS 64MB Cache 3.5 Inch Internal Bare Drive (ST2000NM0001) Fifth-generation, enterprise, nearline drive designed for 247 operation 2 TB capacity Best-in-class enhanced rotational vibration tolerance ensures unrivalled performance in high-density applications for continuous data access. 6Gb/s SAS performance with error detection and correction (IOEDC/IOECC) capabilities and PI (Protection Information) Ships in Certified Frustration-Free Packaging Enhanced efficiencies with PowerChoice host-selectable power options for unprecedented savings during slow or idle periods Seagate RAID Rebuild development platform significantly reduces hours of lost productivity. Multi-drive firmware maximized for enterprise system availability