WD20EFPX vs WD20EZAZ
WD WD20EFPX (2TB) versus WD WD20EZAZ (2TB)
Verdict
For a NAS or any RAID array, the WD20EFPX is the clear pick - it's a CMR drive, while the WD20EZAZ uses SMR recording, which is not recommended for RAID. Only consider the WD20EZAZ for single-drive or archival use.
| WD20EFPX | WD20EZAZ | |
|---|---|---|
| Capacity | 2 TB | 2 TB |
| Recording tech | CMR | SMR |
| RAID / NAS safe | Yes | No |
| Class | NAS | Desktop |
| Spindle speed | 5400 RPM | 5400 RPM |
| Cache | 128 MB | 256 MB |
| Noise (idle) | 24 dB | 21 dB |
| Fill | Air | Air |
| Interface | SATA | SATA |
| Failure rate (AFR) | - | - |
| Price / TB | $84.35 | $70.74 |
Highlighted cells mark the stronger spec for a NAS build. Failure rates from Backblaze Drive Stats where available; $/TB shows once live prices are wired.