WD Purple 2TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD20PURZ

Supports for more than 8 bays. Supports up to 180TB/year workload rate. Engineered specifically for surveillance security systems. Tuned for write-intensive, low bit-rate, high stream-count applications typical to most surveillance applications. Prioritized write-operations for maximized surveillance performance. TLER & ATA streaming support. Tarnish-resistant components. 3-year limited warranty.