WD2005FBYZ vs WD20EFAX
NAS drive head-to-head - specs, value and live price side by side.
Verdict
For a NAS or any RAID array, the WD2005FBYZ is the pick - it's CMR. The WD20EFAX uses SMR recording, which is not recommended for RAID (single-drive or archival use only).
Value at a glance
Price / TB
WD2005FBYZ
$133.38
WD20EFAX
$91.61
Capacity
WD2005FBYZ
2 TB
WD20EFAX
2 TB
Noise (idle)
WD2005FBYZ
20 dB
WD20EFAX
23 dB
Price history
US · cheapest per day
WD2005FBYZ $223
WD20EFAX $230
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| WD2005FBYZ | WD20EFAX | |
|---|---|---|
| Capacity | 2 TB | 2 TB |
| Recording tech | CMR | SMR |
| RAID / NAS safe | Yes | No |
| Class | Enterprise | NAS |
| Spindle speed | 7200 RPM | 5400 RPM |
| Cache | 128 MB | 256 MB |
| Noise (idle) | 20 dB | 23 dB |
| Fill | Air | Air |
| Interface | SATA | SATA |
| Failure rate (AFR) | - | - |
| Price / TB | $133.38 | $91.61 |
| 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.
WD2005FBYZ
No Backblaze failure data for this model.
5yr warranty · 550 TB/yr rated · 2,500,000h MTBF
WD20EFAX
No Backblaze failure data for this model.
3yr warranty · 180 TB/yr rated · 1,000,000h MTBF