The cache is 64 MB and the storage technology is CMR (Conventional Magnetic Recording). The hard drive is designed for surveillance applications with a maximum workload rate of 180 TB per year. Information on capacity (number of platters) is not explicitly available. The hard drive runs at 5400 rpm and supports up to 64 HD cameras. These values correspond to the specifications for a 1TB SATA 3.5" surveillance hard drive from Western Digital.