HDWG21C vs ST12000NM000J
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
Capacity
HDWG21C
12 TB
ST12000NM000J
12 TB
Price history
US · cheapest per day
HDWG21C $630
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| HDWG21C | ST12000NM000J | |
|---|---|---|
| Capacity | 12 TB | 12 TB |
| Recording tech | CMR | CMR |
| RAID / NAS safe | Yes | Yes |
| Class | NAS | Enterprise |
| Spindle speed | 7200 RPM | 7200 RPM |
| Cache | 256 MB | 256 MB |
| Noise (idle) | 20 dB | - |
| Fill | Helium | Helium |
| Interface | SATA | SATA |
| Failure rate (AFR) | - | 1.10% |
| Price / TB | - | - |
| Buy | No US price yet | No US 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.
HDWG21C
No Backblaze failure data for this model.
3yr warranty · 180 TB/yr rated · 1,000,000h MTBF
ST12000NM000J
1.10% AFR vs 1.41% fleet avg
95% CI 0.69-1.66%
1,079 drives · ~2,002 drive-years · 22 failures · Backblaze lifetime Q2 2026
5yr warranty · 550 TB/yr rated · 2,500,000h MTBF