Hitachi Ultrastar A7K3000 2TB HUA723020ALA641 (0F12470) 2TB 64MB Cache 7200RPM SATA III (6.0Gb/s) Enterprise 3.5" Hard Drive (Certified Refurbished) This Certified Refurbished product is tested and inspected to look and work like-new, with limited to no signs of wear. The product comes with relevant accessories and a minimum one-year warranty. 2TB Capacity, 7200RPM Rotation Speed, 64MB Cache 3.5" Internal Hard Drive, SATA III 6.0Gb/s, Enterprise Grade, Heavy Duty Works for PC, Mac, RAID, NAS, CCTV DVR Passed Factory Diagnostic Software + Full "Sector-by-Sector" test to ensure best HDD quality! ZERO Bad Sectors!