Western Digital WD Purple 8TB 3.5″ Surveillance HDD 128MB Cache SATA3 WD84PURZ

Capacity: 8 TB
Interface: SATA
Form Factor: 3.5 Inch
Recording Technology: CMR
Cameras supported: Up to 64 HD
Drive Bays Supported: 16
Al Streams: 16
Firmware Feature Name: All Frame
Tarnish resistant components: Yes
Interface transfer rate (max)
Buffer to host: 6 Gb/s
Host to/from drive (sustained): 194 MB/s
Cache (MB) 128

Reliability/Data Integrity
Load/unload cycles: 300,000
Annualized workload rating: 180TB/yr
Non-recoverable read errors per bits read: <1 in 10^14 MTBF: 1,000,000 Hours Compatibility: WD Purple™ surveillance storage is built to handle up to 64 cameras per drive and is designed for 24/7, always on, high-definition surveillance security systems with more than eight bays2. Dimensions (L x W x H): 147mm x 101.6mm x 26.1mm