HDWD240 vs HMS5C4040BLE640
Toshiba HDWD240 (4TB) versus WD HMS5C4040BLE640 (4TB)
Verdict
For a NAS or any RAID array, the HMS5C4040BLE640 is the clear pick - it's a CMR drive, while the HDWD240 uses SMR recording, which is not recommended for RAID. Only consider the HDWD240 for single-drive or archival use.
| HDWD240 | HMS5C4040BLE640 | |
|---|---|---|
| Capacity | 4 TB | 4 TB |
| Recording tech | SMR | CMR |
| RAID / NAS safe | No | Yes |
| Class | Desktop | Enterprise |
| Spindle speed | 5400 RPM | 5700 RPM |
| Cache | 128 MB | 64 MB |
| Noise (idle) | 22 dB | - |
| Fill | Air | Air |
| Interface | SATA | SATA |
| Failure rate (AFR) | - | 0.49% |
| Price / TB | $53.97 | - |
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.