Western Digital Red 4TB SATA3 (WD40EFRX)

Hard Drive

Western Digital Red 4TB SATA3 (WD40EFRX) Main Picture

Western Digital's Red line of hard drives are a combination of the lower power and low noise features of the Green series along with the 24/7 operation and longevity of the RE series. They are not the fastest drives, but are built for use in storage servers and other always-on systems that need large drive capacity - making them a perfect choice for NAS units, home servers, and RAID configurations.

We have an article where you can read about the differences between the Red and Green series in more depth here.

Model: Western Digital WD40EFRX


Capacity 4000 GB
Rotation Speed 5400 RPM
Interface SATA 6 Gb/s
Cache Size 64 MB
Form Factor 3.5 Inch
Idle Noise 25 dB
Seek Noise 28 dB
Command Queueing NCQ
Peak Power Draw 4.5 Watts
Large Drive Mounting No
Sequential Read 150 MB/s
Sequential Write 150 MB/s


3 Years