Western Digital Gold 12TB 3.5' Enterprise Class SATA 6 Gb/s HDD 7200 RPM Cache Size  256MB 5-Year Limited Warranty
Part Number: WD121KRYZ
Product Features
Capacity1: 12TB
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: 243 / 255
RPM: 7200
Cache1, 5: 256 MB
Reliability
MTBF (hours, projected): 2,500,000
Annualized Failure Rate (AFR, %): 0.35
Load/unload cycles (minimum): 600,000
Limited Warranty (years): 5
Power Management
Operational: 6.9W
Idle: 5.0W
Power efficiency index  (W/TB, idle): 0.4
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: 20 dBA 
Seek Mode: 36 dBA 
Physical Dimensions: 26.1x147x101.6mm, 1.028x5.787x4.0in, 0.66kg, 1.46lb
Country of Assembly: Thailand