HDWR440 vs ST4000DM004
NAS drive head-to-head - specs, value and live price side by side.
Verdict
For a NAS or any RAID array, the HDWR440 is the pick - it's CMR. The ST4000DM004 uses SMR recording, which is not recommended for RAID (single-drive or archival use only).
Value at a glance
Price / TB
HDWR440
$108.07
ST4000DM004
$59.24
Capacity
HDWR440
4 TB
ST4000DM004
4 TB
Noise (idle)
HDWR440
20 dB
ST4000DM004
22 dB
Price history
UK · cheapest per day
HDWR440 £359
ST4000DM004 £187
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| HDWR440 | ST4000DM004 | |
|---|---|---|
| Capacity | 4 TB | 4 TB |
| Recording tech | CMR | SMR |
| RAID / NAS safe | Yes | No |
| Class | Desktop | Desktop |
| Spindle speed | 7200 RPM | 5400 RPM |
| Cache | 256 MB | 256 MB |
| Noise (idle) | 20 dB | 22 dB |
| Fill | Air | Air |
| Interface | SATA | SATA |
| Failure rate (AFR) | - | - |
| Price / TB | $108.07 | $59.24 |
| Buy | No UK price yet |
£187
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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.
HDWR440
No Backblaze failure data for this model.
2yr warranty
ST4000DM004
No Backblaze failure data for this model.
2yr warranty