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4TB, 3.5", SATA 6Gb/s, 5400 RPM, 64MB
With drives up to 10TB, the WD Red drive is built for single-bay to 8-bay NAS systems and packs the capacity to store your precious data in one powerhouse unit.
Cooler Temperatures
By reducing power consumption, the operating temperature of your NAS stays cool. With a lower temperature in your system, you can create a more reliable solution for your NAS.
Built for NAS Compatibility
WD Red drives with NASware technology are purpose-built to balance performance and reliability in NAS and RAID environments.
Desktop Drive vs. WD Red Drive
A desktop hard drive is not typically tested and designed for NAS environments. WD Red has features such as NAS compatibility, increased reliability and more.
WD RED. BUILT FOR NAS.
Equip your NAS with WD Red hard drives and enjoy streaming your media, backing up your PCs, sharing your files, and managing your digital content quickly and easily.
3D Active Balance Plus
Helps to ensure your data is protected from excessive vibration and noise in a NAS or RAID environment. This dual-plane balance control maintains your drive’s performance over time.
Premium Support and a 3-year Limited Warranty
Confidently upgrade to the best in NAS drive performance with the assurance of a 3-year limited warranty and world-class support services included with every WD Red drive.
24/7 Reliability
Since your NAS system is always on, a highly reliable drive is essential for long term reliability. Desktop drives are not designed and tested in 24x7 conditions, which is a foundation of WD Red NAS hard drives.
EXCLUSIVE TECHNOLOGY
Seamless integration, robust data protection and optimal performance for NAS systems under heavy demand.
Western Digital
Western Digital Red internal hard drive 4 TB 5400 RPM 64 MB 3.5" Serial ATA III
Part number:
WD40EFRX
$172.44
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Reasons To Buy
WD RED FOR HOME
Stream, backup, organize and effortlessly share your digital content to your TV, PC and more. NASware technology increases your drives' compatibility with your NAS system, for better playback with your devices.WD RED FOR SMALL BUSINESS
Businesses thrive on productivity and efficiency, two guiding principles built into the design of the WD Red drive. Share and backup files at the speed of your business with a WD Red drive in your NAS.WD RED FOR BIG BUSINESS
Looking for maximum performance in a heavy use NAS? The WD Red Pro drive is designed to handle an increase in workload and system demand and features a 5-year limited warranty.DESIGNED FOR NAS
Desktop drives aren't purpose-built for NAS. But WD Red drives with NASware 3.0 are. Our exclusive technology takes the guesswork out of selecting a drive. We can help you find the perfect storage for your NAS system.Description
FILL YOUR NAS WITH RED. THEN FILL IT WITH AWESOME.With drives up to 10TB, the WD Red drive is built for single-bay to 8-bay NAS systems and packs the capacity to store your precious data in one powerhouse unit.
Cooler Temperatures
By reducing power consumption, the operating temperature of your NAS stays cool. With a lower temperature in your system, you can create a more reliable solution for your NAS.
Built for NAS Compatibility
WD Red drives with NASware technology are purpose-built to balance performance and reliability in NAS and RAID environments.
Desktop Drive vs. WD Red Drive
A desktop hard drive is not typically tested and designed for NAS environments. WD Red has features such as NAS compatibility, increased reliability and more.
WD RED. BUILT FOR NAS.
Equip your NAS with WD Red hard drives and enjoy streaming your media, backing up your PCs, sharing your files, and managing your digital content quickly and easily.
3D Active Balance Plus
Helps to ensure your data is protected from excessive vibration and noise in a NAS or RAID environment. This dual-plane balance control maintains your drive’s performance over time.
Premium Support and a 3-year Limited Warranty
Confidently upgrade to the best in NAS drive performance with the assurance of a 3-year limited warranty and world-class support services included with every WD Red drive.
24/7 Reliability
Since your NAS system is always on, a highly reliable drive is essential for long term reliability. Desktop drives are not designed and tested in 24x7 conditions, which is a foundation of WD Red NAS hard drives.
EXCLUSIVE TECHNOLOGY
Seamless integration, robust data protection and optimal performance for NAS systems under heavy demand.
Specifications
| Hard drive | |
|---|---|
| Component for | NAS |
| HDD sustained transfer rate | 150 MiB/s |
| HDD interface transfer rate | 6 Gbit/s |
| Mean time between failures (MTBF) | 1000000 h |
| Start/stop cycles | 600000 |
| HDD speed | 5400 RPM |
| HDD size | 3.5" |
| HDD capacity | 4 TB |
| Features | |
| Type | HDD |
| Component for | NAS |
| HDD sustained transfer rate | 150 MiB/s |
| HDD interface transfer rate | 6 Gbit/s |
| Interface | Serial ATA III |
| Mean time between failures (MTBF) | 1000000 h |
| Start/stop cycles | 600000 |
| HDD speed | 5400 RPM |
| HDD size | 3.5" |
| HDD capacity | 4 TB |
| Storage drive buffer size | 64 MB |
| Power | |
| Power consumption (standby) | 0.4 W |
| Power consumption (write) | 4.5 W |
| Power consumption (read) | 4.5 W |
| Power consumption (idle) | 3.3 W |
| Start-up current | 1.75 A |
| Operating voltage | 5 / 12 V |
| Operational conditions | |
| Operating temperature (T-T) | 0 - 65 °C |
| Storage temperature (T-T) | -40 - 70 °C |
| Operating shock | 30 G |
| Non-operating shock | 250 G |
| Technical details | |
| Quantity per pack | 1 pc(s) |
| Harmonized System (HS) code | 84717050 |
| Compliance certificates | RoHS |
| Interface | Serial ATA III |
| Mean time between failures (MTBF) | 1000000 h |
| Packaging content | |
| Storage drive adapter included | No |
| Weight & dimensions | |
| Width | 4" (101.6 mm) |
| Weight | 24 oz (680 g) |
| Height | 1.03" (26.1 mm) |
| Depth | 5.79" (147 mm) |
| Packaging data | |
| Storage drive adapter included | No |
| Quantity per pack | 1 pc(s) |
| Logistics data | |
| Harmonized System (HS) code | 84717050 |
| Other features | |
| Interface | Serial ATA III |
| Compliance certificates | RoHS |