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WD NasWare Red WD40EFRX 4 TB
CMR

Photos - Hard Drive WD NasWare Red WD40EFRX 4 TB CMR
WD WD40EFRX
Placement
built-in
Type
HDD
Features
server
Size
4000 GB
Form factor
3.5 "
Connection
SATA3
Manufacturer's warranty
3 years
Cache memory
64 MB
Record technology
CMR
RPM
5400 rpm
Operation power consumption
4.5 W
Standby power consumption
3.3 W
Shockproof
65 G
Reading noise level
28 dB
Standby mode noise level
25 dB
MTBF
1 M h
MTBF
600 K
Added to E-Catalog
october 2013
Optimized for RAID and NAS.
Not suitable for the role of the main system disk.
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog WD 2025 - new arrivals, bestsellers, and the most relevant models WD.
How to Choose a Hard DriveUnderstanding how to choose the right HDD for gaming, video recording, server, and other tasks

Buy WD NasWare Red WD40EFRX 4 TB
CMR

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Western Digital WD Red WD40EFRX 4 TB 90521093

SATA hard drives (SATA) WD Red WD40EFRX 4 TB
Amazon.co.uk
Delivery: to United Kingdom
Report
£135.00

Western Digital Red 4TB internal hard drive Variable 64 MB 3.5" S WD40EFRX-RFB

Hard driveData transfer rate6 Gbit/sIntelliPowerYesMean time between failures (MTBF)1000000 hHDD speedVariableHDD size3.5"HDD... morecapacity4 TBSoftwareWindows operating systems supportedYesMac operating systems supportedYesFeaturesTypeHDDInterfaceSerial ATA IIIWindows operating systems supportedYesIntelliPowerYesMac operating systems supportedYesMean time between failures (MTBF)1000000 hHDD speedVariableHDD size3.5"HDD capacity4 TBStorage drive buffer size64 MBPowerOperating voltage5 / 12 V
ComputersDeal.com
Delivery: in United Kingdom
Report
£149.04

Western Digital Red 4TB internal hard drive Variable 64 MB 3.5" S WD40EFRX-RFB

Hard driveData transfer rate6 Gbit/sIntelliPowerYesMean time between failures (MTBF)1000000 hHDD speedVariableHDD size3.5"HDD... morecapacity4 TBSoftwareWindows operating systems supportedYesMac operating systems supportedYesFeaturesTypeHDDInterfaceSerial ATA IIIWindows operating systems supportedYesIntelliPowerYesMac operating systems supportedYesMean time between failures (MTBF)1000000 hHDD speedVariableHDD size3.5"HDD capacity4 TBStorage drive buffer size64 MBPowerOperating voltage5 / 12 V
itsupplies.uk
Delivery: to United Kingdom
Report
£147.74

Western Digital Western Digital Red SATA III 4TB (WD40EFRX)

NAS Drive / Memory Capacity 4 TB / SATA III (SATA 600) / RPMs 5,400 rpm / Power Consumption (Operating) 4.5 Watt / Power Cons... moreumption (Idle) 3.3 Watt / Noise Level (Operating) 28 dB / 3.5 Inch / Height 26.1 mm
Idealo.co.uk
Delivery: in United Kingdom
Report
£84.99

WESTERN DIGITAL HDD WD NAS 35 4TB 7200RPM 256MB SATA3 RED PRO WD40EFRX-68AX9N0

Western Digital HDD WD NAS 3.5'' 4TB 7200RPM 256MB SATA3 RED PRO
Amazon.co.uk
Delivery: to United Kingdom
Report
£168.11

WD NasWare Red WD40EFRX configurations

Price for WD NasWare Red WD40EFRX
WD NasWare Red WD10EFRX 1 TBfrom £44.284 offers
WD NasWare Red WD20EFRX 2 TBfrom £79.436 offers
WD NasWare Red WD30EFRX 3 TB
CMR
from £74.996 offers
WD NasWare Red WD40EFRX 4 TB
CMR
from £84.995 offers
WD NasWare Red WD40EFAX 4 TB
SMR
from £154.504 offers
WD NasWare Red WD60EFRX 6 TB
CMR
from £382.202 offers
Video reviews

Red Baron

De jure, WD Red is a hard drive for creating RAID arrays (mirror or serial) and installing in NAS servers. The spindle speed is 5400 rpm, that is, compared to other PC components, it is almost silent. 64 MB of buffer memory to speed up the processing of the smallest files. Sequential read and write is performed at 150 – 160 MB / s, which is quite fast by the standards of low-speed HDDs.

Round the clock work

Implemented in Red a number of proprietary technologies WD. First, NASware 3.0 firmware provides 100% compatibility with popular NAS server models, 24/7 operation, and easy RAID scalability. Simply put, you can install additional drives even without having to reboot your PC or NAS server — the operating system will attach them to the shared disk space, as they say, "on the fly".

Quiet and smooth

Secondly, 3D Active Balance Plus balances magnetic plates in two planes with precision, thereby reducing vibration and increasing HDD reliability. Finally, thirdly, IntelliPower automatically changes the data transfer rate and the smart caching algorithm depending on the load. Indeed, from our personal experience we can confirm that Red, regardless of the size, are among the quietest 3.5-inch HDDs on the market.

For home and office

But de facto, the WD Red is a fairly versatile, quiet and reliable hard drive that's great for a home or work PC as an addition to a fast but low-capacity SSD. That is, whether the scope of its application is not limited to NAS servers alone. WD Red is not suitable except for the role of the main system drive — for this task it is better to choose Blue or Black at 7200 rpm (read and write speed 200 – 220 MB / s).

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