HDD

Western Digital 4TB SATA 3.5-Inch 5400 RPM 256MB Cache Purple Surveillance Hard Disk Drive ( WD43PURZ )

Toshiba S300 4TB SATA 3.5Inch 5400 RPM Up to 256 MB Buffer Surveillance Desktop Internal Hard Disk Drive ( HDWT840UZSVA )

Western Digital WD Purple WD64PURZ 6TB 5400 RPM 3.5-Inch SATA CMR Surveillance Hard Disk Drive

Western Digital Purple 2TB 3.5-Inch SATA Surveillance Desktop Internal Hard Disk Drive ( WD23PURZ ) Engineered for mainstream surveillance systems WD AllFrame technology delivers optimizations for write-intensive, low bit-rate, high stream-count workloads typical to mainstream surveillance applications Supports up to 180TB/yr workload rate and up to 16 bays