WD Red Plus 4TB
4TB
Model WD40EFPX
- rpm
- 5,400
- MB cache
- 256
- TB/yr
- 180
- yr warranty
- 3
WD Red Plus range, also in 6 TB, 8 TB, 12 TB
Who the WD Red Plus 4 TB is for
If the NAS lives in the lounge or a bedroom, this is the kind of drive you want, because 5,400 rpm is the slower and quieter class and a gigabit network runs out of puff long before the drive does. Recording is CMR, the right kind for RAID and ZFS.
Watch out for
Treat that bay rating as a hard limit. Anything larger wants a pro or data-centre drive. You get three years' cover and a 180 TB a year workload rating, both on the light side if the pool's busy every day.
There's no Backblaze data worth quoting here. A 4-bay box full of these gives 12 TB after one drive's worth of parity.
Specifications
Each value links to the Western Digital page or datasheet it came from, and "Not published" means the maker doesn't list it there.
| Capacity | 4 TB | source for Capacity (documents.westerndigital.com, opens in new tab) |
|---|---|---|
| Spindle speed | 5,400 rpm | source for Spindle speed (documents.westerndigital.com, opens in new tab) |
| Recording technology | CMR | source for Recording technology (documents.westerndigital.com, opens in new tab) |
| Cache | 256 MB | source for Cache (documents.westerndigital.com, opens in new tab) |
| Interface | SATA 6Gb/s | source for Interface (documents.westerndigital.com, opens in new tab) |
| Form factor | 3.5in | source for Form factor (documents.westerndigital.com, opens in new tab) |
| Workload rating | 180 TB/yr | source for Workload rating (documents.westerndigital.com, opens in new tab) |
| MTBF / MTTF | 1,000,000 hours | source for MTBF / MTTF (documents.westerndigital.com, opens in new tab) |
| Rated for NAS bays (max) | 8 bays | source for Rated for NAS bays (max) (documents.westerndigital.com, opens in new tab) |
| Warranty | 3 years | source for Warranty (documents.westerndigital.com, opens in new tab) |
Sources: documents.westerndigital.com
Failure rate
There's no Backblaze figure for this one. We only publish a rate with at least 60 drives and 50 drive-years behind it, because below that the error bars are too wide to tell you anything. The reliability page has every model that clears the bar.
WD Red Plus 4TBWD40EFPX