WD RED NAS WD40EFAX 4TB 3.5" 5400RPM 256MB Cache SATA HDD

Capacity: 4TB
Model Number: WD40EFAX
Recording Technology: SMR
Interface: SATA 6 Gb/s
Formatted capacity: 4TB
Form factor: 3.5-inch
Native command queuing: Yes
Advanced Format (AF): Yes
RoHS compliant: Yes
Performance:
Interface Transfer Rate up to: 180 MB/s
Cache (MB): 256
Performance Class: 5400 RPM Class
Reliability/Data Integrity:
Load/unload cycles: 600000
Non-recoverable read errors per bits read: <1 in 1014
MTBF (hours): 1000000
Workload Rate (TB/year): 180
Limited warranty (years): 3
Power Management:
12VDC ±5% (A, peak): 1.75
Read/Write: 4.8
Idle: 3.1
Standby and Sleep: 0.4
Environmental Specifications:
Operating: 0 to 60
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 , ± 10%): 1.26/0.57