WD Red Pro 20TB
20TB
Model WD201KFGX
- rpm
- 7,200
- MB cache
- 512
- TB/yr
- 550
- yr warranty
- 5
WD Red Pro range, also in 16 TB, 22 TB
Should you buy the WD Red Pro 20 TB?
Go for it if you're building something bigger than a 4-bay box. It also earns its keep on a busy pool where scrubs and rebuilds never let up, because the 550 TB a year workload rating is there for exactly that. WD backs it for five years, which is a long time in drive terms. CMR, thankfully. SMR and parity rebuilds don't get on.
Watch out for
At 7,200 rpm it's from the louder, warmer class. Fine in a cupboard, less fun on a desk.
There's no Backblaze data worth quoting here. Four of them in SHR or RAID 5 give 60 TB usable, or 54.6 TB once Windows has done its binary maths on it.
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 | 20 TB | source for Capacity (documents.westerndigital.com, opens in new tab) |
|---|---|---|
| Spindle speed | 7,200 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 | 512 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 | 550 TB/yr | source for Workload rating (documents.westerndigital.com, opens in new tab) |
| MTBF / MTTF | 2,500,000 hours | source for MTBF / MTTF (documents.westerndigital.com, opens in new tab) |
| Rated for any number of NAS bays | Yes | source for Rated for any number of NAS bays (documents.westerndigital.com, opens in new tab) |
| Warranty | 5 years | source for Warranty (documents.westerndigital.com, opens in new tab) |
Sources: documents.westerndigital.com
Failure rate
Backblaze doesn't run this model, or not in big enough numbers. 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 Pro 20TBWD201KFGX