Hard Drive ST6000VX001, 6 TB, SATA/600, Buffer 256 MB, Internal, From Factor 3.5", SkyHawk, SATA 6Gb/s Interface, 256MB Cache, MTBF 1,000,000 Hours, 3 Years Limited Warranty Optimised for DVRs and NVRs, SkyHawk™ surveillance drives are tuned for 24×7 workloads in capacities up to 10TB. Equipped with enhanced ImagePerfect™ firmware, SkyHawk helps to minimise dropped frames and downtime.