The cache is 256 MB and the storage technology is CMR (Conventional Magnetic Recording). The hard drive is designed for surveillance applications and uses air rather than helium filling. The maximum workload rate is 180 TB per year. The maximum internal transfer rate is up to 175 MB/s. The interface is SATA with 6 Gb/s, and the speed is 5400 rpm.
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.
As long as the server runs 24 hours a day, yes, because the disks are designed for 24/7 operation. Mine have been in operation for over 1 year without any problems.