WD Purple 18TB Surveillance Hard Disk Drive - 7200 RPM Class SATA 6 Gb/s 256MB Cache 3.5 Inch - WD180PURZ
Brand: Western Digital
Color: Purple
Prioritized write-operations for maximized surveillance performance
Engineered specifically for surveillance security systems
Supports up to 180 TB/yr workload rate*
Tuned for write-intensive, low bit-rate, high stream-count applications typical to most surveillance applications
TLER & ATA streaming support