WD PURPLE SURVEILLANCE WD43PURZ 4TB 3.5" 5400RPM 256MB Cache SATA HDD

Capacity: 4TB
Model Number: WD43PURZ
Formatted capacity: 4TB
Form factor: 3.5-inch
Advanced Format (AF): Yes
Recording Technology: CMR
RoHS compliant: Yes
Product Features:
Cameras supported: Up to 64 HD
Maximum Drive Bays Supported: 16
Firmware Feature Name: AllFrame
Tarnish resistant components: Yes
RV Sensors: Yes
Performance:
Interface transfer rate (max): 6 Gb/s
Host to/from drive (sustained): 180MB/s
Cache (MB): 256
Reliability/Data Integrity:
Load/unload cycles: 300000
Annualized workload rating: 180TB/yr
Non-recoverable read errors per bits read: <1 in 10^14
MTBF: 1000000
Limited warranty (years): 3
Power Management:
"Average power requirements (W)
Read/Write: 4.7"
Idle: 4.3
Standby and Sleep: 0.3
Environmental Specifications:
Operating: 0 to 65
Non-operating: -40 to 70
"Shock (Gs)
Operating (2 ms, read/write): 30"
Operating (2 ms, read): 65
Non-operating (2 ms): 250
Acoustics (dBA) Idle: 23
Seek (average): 27
Physical Dimensions:
Height (in./mm, max): 1.028/26.1
Length (in./mm, max): 5.787/147
Width (in./mm, ± .01 in.): 4/101.6
Weight (lb/kg, ± 3%): 1.26/0.57