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Western Digital Hard Drives | WD  Red WD40EFAX NAS 4TB 3.5
WD WD40EFAX | serversplus.com

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WD Red WD40EFAX NAS 4TB 3.5" 5400rpm 256MB Cache Sata III Internal Hard Drive

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Manufacturer Part Code: WD40EFAX

Order Code: HDWES-WD40EFAX

Category: Western Digital Hard Drives

WD Red WD40EFAX NAS 4TB 3.5" 5400rpm 256MB Cache Sata III Internal Hard Drive

There's a WD Red drive for every compatible NAS system to help fulfill your data storage needs. With drives up to 14TB, WD Red offers a wide array of solutions for customers looking to build a high performing NAS storage solution. Built for single-bay to 8-bay NAS systems, WD Red packs the power to store your precious data in one powerhouse unit. With WD Red, you're ready for what's next.

The drive for NAS
Desktop drives aren't typically tested or designed for the rigors of a NAS system. Do right by your NAS and choose the drive with an array of features to help preserve your data and maintain optimum performance.

Built for NAS Compatibility
WD Red drives with NASware 3.0 technology are purpose-built to balance performance and reliability in NAS and RAID environments.

Keep it Cool
The always-on environment of a NAS or RAID is a hot one. WD Red drives are engineered to run cool and quiet while offering optimum compatibility for demanding 24x7 environments.

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.

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.

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.

24/7 Environment
Since your NAS system is always on, a reliable drive is essential. Desktop drives are not typically 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.


Business IT purchase over £1000? Spread the cost on a monthly basis with our flexible leasing options.

Technical Information

Power consumption (standby)
0.4 W
Start-up current
1.75 A
Operating voltage
5 / 12 V
Power consumption (idle)
3.1 W
Power consumption (read)
4.8 W
Power consumption (write)
4.8 W
HDD capacity
4000 GB
Interface
Serial ATA III
Type
HDD
HDD speed
5400 RPM
Mean time between failures (MTBF)
1000000 h
HDD size
3.5"
Start/stop cycles
600000
Noise level (idle)
23 dB
Hot-swap
N
RoHS compliance
Y
Native Command Queuing (NCQ)
Y
Component for
NAS
HDD interface transfer rate
6 Gbit/s
HDD sustained transfer rate
180 MiB/s
Workload rate limit
180 TB/year
HDD buffer size
256 MB
Advanced Format (AF)
Y
24/7 operation
Y
Hard drive capacity
4000 GB
Interface
Serial ATA III
Type
HDD
Hard drive rotational speed
5400 RPM
Mean time between failures (MTBF)
1000000 h
Hard drive size
3.5"
Start/stop cycles
600000
Hot-swap
N
RoHS compliance
Y
Component for
NAS
Hard drive interface transfer rate
6 Gbit/s
Hard drive sustained transfer rate
180 MiB/s
Workload rate limit
180 TB/year
HDD buffer size
256 MB
Storage temperature range (T-T)
-40 - 70 °C
Operating temperature range (T-T)
0 - 60 °C
Operating shock
65 G
Non-operating shock
250 G
Interface
Serial ATA III
Operating voltage
5 / 12 V
Native Command Queuing (NCQ)
Y
Quantity
1
Storage drive adapter included
N
Quantity
1
Storage drive adapter included
N
Interface
Serial ATA III
Mean time between failures (MTBF)
1000000 h
Hot-swap
N
Native Command Queuing (NCQ)
Y
Weight
570 g
Height
26.1 mm
Width
101.6 mm
Depth
147 mm

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