WD20EFAX vs WD20EFPX
NAS drive head-to-head - specs, value and live price side by side.
Verdict
For a NAS or any RAID array, the WD20EFPX 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
WD20EFAX
$85.32
WD20EFPX
$77.50
Capacity
WD20EFAX
2 TB
WD20EFPX
2 TB
Noise (idle)
WD20EFAX
23 dB
WD20EFPX
24 dB
Price history
CA · cheapest per day
WD20EFPX C$260
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| WD20EFAX | WD20EFPX | |
|---|---|---|
| Capacity | 2 TB | 2 TB |
| Recording tech | SMR | CMR |
| RAID / NAS safe | No | Yes |
| Class | NAS | NAS |
| Spindle speed | 5400 RPM | 5400 RPM |
| Cache | 256 MB | 128 MB |
| Noise (idle) | 23 dB | 24 dB |
| Fill | Air | Air |
| Interface | SATA | SATA |
| Failure rate (AFR) | - | - |
| Price / TB | $85.32 | $77.50 |
| Buy | No CA price yet | No CA 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.
WD20EFAX
No Backblaze failure data for this model.
3yr warranty · 180 TB/yr rated · 1,000,000h MTBF
WD20EFPX
No Backblaze failure data for this model.
3yr warranty · 180 TB/yr rated · 1,000,000h MTBF