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WD RED NAS HARD DRIVE
| Segment | WD RED |
|---|
Specification
Model Number¹ |
WD40EFRX |
| Interface | SATA 6 Gb/s |
| Formatted capacity² | 4TB |
| Form factor | 3.5-inch |
| Native command queuing | Yes |
| Advanced Format (AF) | Yes |
| RoHS compliant³ | Yes |
Performance
| Interface Transfer Rate² (read speed) up to | 150 MB/s |
| Cache (MB)² | 64 |
| Performance Class | 5400 RPM Class |
Reliability/Data Integrity
| Load/unload cycles⁴ | 600,000 |
| Non-recoverable errors per bits read | <1 in 1014 |
| MTBF (hours)⁵ | 1,000,000 |
| Workload Rate (TB/year)⁶ | 180 |
| Limited warranty (years) | 1 Year Warranty |
Power Management8
| 12VDC ±5% (A, peak)
5VDC ±5% (A, peak) Average power requirements (W) |
1.73 |
| Read/Write | 4.5 |
| Idle | 3.3 |
| Standby and Sleep | 0.4 |
Environmental Specifications⁹
Temperature (°C)
| Operating | 0 to 65 |
| 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)10
| Idle | 25 |
| Seek (average) | 28 |
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%) | 1.50/0.68 |
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