Western Digital Red 4TB 5400rpm 3.5 Inch 256MB Cache SATA3 NAS Hard Drive

Western Digital Red hard drives are designed specifically for NAS systems that have1 to 5 bays. The drives are designed and extensively tested for compatibility in the unique 24x7 demanding system requirements of home and small office NAS.

General Specifications :
• Interface: SATA 6 Gb/s
• Formatted Capacity: 4TB
• Form Factor: 3.5 Inch
• Native command queuing: Yes
• Advanced Format (AF): Yes
• RoHS compliant: Yes
• Dimensions (HxLxW): 26.1 x 147 x 101.6 mm
• Weight (approx.): 570 g

Performance:
• Interface Transfer Rate up to: 180 MB/s
• Cache: 256 MB
• Performance Class: 5400 RPM Class

Reliability/Data Integrity:
• Load/unload cycles: 600,000
• Non-recoverable read errors per bits red: < 1 in 10^14
• MTBF: 1,000,000 hours
• Workload Rate: 180 TB/year


Average Power Requirements:
• Read/Write: 4.8 W
• Idle: 3.1 W
• Standby and Sleep: 0.4 W

Environmental Specifications:
• Operating Temperature: 0 to 60 °C
• Non-operating Temperature: -40 to 70 °C
• Operating Shock 2 ms, read/write): 30 Gs
• Operating Shock 2 ms, read): 65 Gs
• Non-operating Shock: 250 Gs
• Idle acoustics: 23 dBA
• Seek acoustics (average): 27 dBA