Western Digital Gold 4TB 3.5' Enterprise Class SATA 6 Gb/s HDD 7200 RPM Cache Size  256MB 5-Year Limited Warranty
Part Number: WD4004FRYZ
Product Features
Capacity1: 4TB
Interface: SATA 6 Gb/s
Format: Sector size (bytes)2: 512e
Native Command Queuing: Yes
Form Factor: 3.5-inch
OptiNAND™ technology: No
ArmorCacheTM: No
RoHS compliant3: Yes
Performance
Data Transfer Rate4 (max sustained transfer rate)
MiB/s / MB/s: 255 / 267
RPM: 7200
Cache1, 5: 256 MB
Reliability
MTBF (hours, projected): 2,000,000
Annualized Failure Rate (AFR, %): 0.44
Load/unload cycles (minimum): 600,000
Limited Warranty (years): 5
Power Management
Operational: 7.0W
Idle: 5.8W
Power efficiency index  (W/TB, idle): 1.45
Environmental Specifications
Operating (half-sine wave, 2ms): 70G/70G
Non-operating (half-sine wave, 2ms): 300G
Operating: 5°C to 60°C
Non-operating: -40°C to 70°C
Idle Mode: 29 dBA 
Seek Mode: 36 dBA 
Physical Dimensions: 26.1x147x101.6mm, 1.028x5.787x4.0in, 0.71kg, 1.58lb
Country of Assembly: Thailand