Seagate Barracuda ST2000DM008 2TB Hard Drive

WD Purple 2TB Surveillance Hard Drive 5400 RPM SATA 6 Gb/s 64MB

WD Purple 1TB Surveillance Hard Drive 5400 RPM SATA 6 Gb/s 64MB Cache

Western Digital Caviar Blue 1TB 7200RPM SATA 3

WD Purple 3TB Surveillance Hard Drive 5400 RPM SATA 6 Gb/s 64MB