WD Red Pro 22TB
22TB
Model WD221KFGX
- rpm
- 7,200
- MB cache
- 512
- TB/yr
- 550
- yr warranty
- 5
WD Red Pro range, also in 16 TB, 20 TB
Should you buy the WD Red Pro 22 TB?
This is the one to look at once you're past eight bays or the array's busy all day, because WD rates it for 550 TB a year and doesn't care how big the box is. Five years of warranty is the other draw, and on a drive you'll leave spinning for most of a decade that's worth having. CMR, thankfully. SMR and parity rebuilds don't get on.
Watch out for
It's a 7,200 rpm drive and you'll hear it working.
Backblaze doesn't run enough of these for a failure rate we'd publish. Put four in RAID 5 and you'll have 66 TB to fill (Windows will call it 60.0 TB).
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 | 22 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 22TBWD221KFGX