WD Purple Surveillance 3.5in SATA III HDD, 4TB w/ 256MB Cache

Specifications:

Make and Model Western Digital Purple Surveillance HDD, 4TB
Part Number WD43PURZ

Drive
Formatted Capacity 4TB1
Interface SATA III, 6 Gb/s maximum
Form Factor 3.5"

Performance
Transfer Rate Sustained: 180 MB/second
Cache 256MB

Reliability
MTBF 1,000,000 hours
Load / Unload 300,000 Cycles
Annualized workload rating 180 TB/yr
Read Errors <1 in 1014

Environmentals
Acoustics Idle: 23 dBA
Seek Mode: 27 dBA
Shock Operating (2ms, read/write): 30 Gs
Operating (2ms, read): 65 Gs
Non-operating (2ms): 250 Gs
Temperature Operating: 0 ~ 65° C
Non-Operating: -40 ~ 70° C

Power
Power Usage Typical Read / Write: 4.7W
Idle: 4.3W
Standby & Sleep Modes: 0.3W

Dimensions & Weight
Dimensions 101.6 x 147.0 x 26.1mm
Weight 570g