| Country of origin | Thailand |
| Type | hard drive |
| Model | WD Red IntelliPower |
| Manufacturer code | WD40EFAX |
| Purpose | NAS |
| HDD capacity | 4 TB |
| Cache capacity | 256 MB |
| Spindle speed | 5400 rpm |
| Maximum data transfer rate | 180 MB/sec |
| Average Latency | 4.2 ms |
| Interface | SATA III |
| Interface bandwidth | 6 Gbps |
| Optimized for RAID arrays | yes |
| Impact resistance during operation | 30 G |
| Noise level during operation | 27 dB |
| Noise level at idle | 23 dB |
| Helium filled | no |
| Number of positioning-parking cycles | 600000 |
| Maximum power consumption | 4.8 W |
| Standby power consumption | 3.1 W |
| Maximum operating temperature | 60 °C |
| Width | 101.6 mm |
| Length | 147 mm |
| Thickness | 26.1 mm |
| Weight | 570 g |
| Seller's warranty | 12 months. |
| Recording technology | SMR |
![4 TB WD Red IntelliPower Hard Drive [WD40EFAX]](https://s3.twcstorage.ru/61867670-6b04e8a9-8a80-4c8a-94ed-7db148512530/eshop/products/10103/01_md.jpg)
![4 TB WD Red IntelliPower Hard Drive [WD40EFAX]](https://s3.twcstorage.ru/61867670-6b04e8a9-8a80-4c8a-94ed-7db148512530/eshop/products/10103/02_md.jpg)
![4 TB WD Red IntelliPower Hard Drive [WD40EFAX]](https://s3.twcstorage.ru/61867670-6b04e8a9-8a80-4c8a-94ed-7db148512530/eshop/products/10103/03_md.jpg)
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