WD221PURP vs WUH722222ALE6L4
NAS drive head-to-head - specs, value and live price side by side.
Verdict
These are closely matched NAS drives of the same capacity - decide on price and warranty. Check the live $/TB above.
Value at a glance
Price / TB
WD221PURP
$43.14
WUH722222ALE6L4
$37.73
Capacity
WD221PURP
22 TB
WUH722222ALE6L4
22 TB
Noise (idle)
WD221PURP
20 dB
WUH722222ALE6L4
20 dB
Price history
UK · cheapest per day
WD221PURP £961
WUH722222ALE6L4 £1,056
zoomed ·
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| WD221PURP | WUH722222ALE6L4 | |
|---|---|---|
| Capacity | 22 TB | 22 TB |
| Recording tech | CMR | CMR |
| RAID / NAS safe | Yes | Yes |
| Class | Surveillance | Enterprise |
| Spindle speed | 7200 RPM | 7200 RPM |
| Cache | 512 MB | 512 MB |
| Noise (idle) | 20 dB | 20 dB |
| Fill | Helium | Helium |
| Interface | SATA | SATA |
| Failure rate (AFR) | - | 0.47% |
| Price / TB | $43.14 | $37.73 |
| Buy | No UK price yet | No UK price yet |
Highlighted cells mark the stronger spec for a NAS build. Failure rates from Backblaze Drive Stats where available; $/TB uses the cheapest live price. Buy links are Amazon affiliate.
WD221PURP
No Backblaze failure data for this model.
5yr warranty · 550 TB/yr rated · 2,500,000h MTBF
WUH722222ALE6L4
0.47% AFR vs 1.41% fleet avg
95% CI 0.42-0.53%
45,556 drives · ~59,595 drive-years · 282 failures · Backblaze thru Q2 2026
5yr warranty · 550 TB/yr rated · 2,500,000h MTBF