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WD's exclusive NASware technology, built into every WD Red hard drive, improves NAS storage performance by reducing common hard drive concerns in NAS systems including concerns for things like compatibility, integration, upgradeability, reliability and cost of ownership that are experienced with a hard drive designed for desktop computers.
| Product Description | WD Red WD40EFAX - hard drive - 4 TB - SATA 6Gb/s | Type | Hard drive - internal | Capacity | 4 TB | Form Factor | 3.5" | Interface | SATA 6Gb/s | Data Transfer Rate | 600 MBps | Buffer Size | 256 MB | Spindle Speed | 5400 rpm | Features | Native Command Queuing (NCQ), Advanced Format technology, NAS compatible, NASware technology, 24x7 availability | Dimensions (WxDxH) | 101.6 mm x 147 mm x 26.1 mm | Weight | 570 g | Manufacturer Warranty | 3-year warranty |
General | |
| Device Type | Hard drive - internal |
| Capacity | 4 TB |
| Form Factor | 3.5" |
| Interface | SATA 6Gb/s |
| Buffer Size | 256 MB |
| Features | Native Command Queuing (NCQ), Advanced Format technology, NAS compatible, NASware technology, 24x7 availability |
| Width | 101.6 mm |
| Depth | 147 mm |
| Height | 26.1 mm |
| Weight | 570 g |
Performance | |
| Drive Transfer Rate | 600 MBps (external) |
| Internal Data Rate | 150 MBps |
| Spindle Speed | 5400 rpm |
Reliability | |
| MTBF | 1,000,000 hours |
| 24x7 Operation | Yes |
| Non-Recoverable Errors | 1 per 10^14 |
| Load / Unload Cycles | 600,000 |
Expansion & Connectivity | |
| Interfaces | 1 x SATA 6 Gb/s |
| Compatible Bay | 3.5" |
Power | |
| Power Consumption | 4.5 Watt (read) , 4.5 Watt (write) , 3.3 Watt (idle) , 0.4 Watt (sleep) , 0.4 Watt (standby) |
Miscellaneous | |
| Compliant Standards | RoHS 2011/65/EU |
Manufacturer Warranty | |
| Service & Support | Limited warranty - 3 years |
Environmental Parameters | |
| Min Operating Temperature | 0 °C |
| Max Operating Temperature | 65 °C |
| Min Storage Temperature | -40 °C |
| Max Storage Temperature | 70 °C |
| Shock Tolerance (operating) | 30 g @ 2 ms |
| Shock Tolerance (non-operating) | 250 g @ 2 ms |
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