DT02ABA400 vs HMS5C4040BLE640
NAS drive head-to-head - specs, value and live price side by side.
Verdict
For a NAS or any RAID array, the HMS5C4040BLE640 is the pick - it's CMR. The DT02ABA400 uses SMR recording, which is not recommended for RAID (single-drive or archival use only).
Value at a glance
Capacity
DT02ABA400
4 TB
HMS5C4040BLE640
4 TB
| DT02ABA400 | 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) | - | - |
| Fill | Air | Air |
| Interface | SATA | SATA |
| Failure rate (AFR) | - | 0.47% |
| Price / TB | - | - |
| Buy | No UK price yet | No UK 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.
DT02ABA400
No Backblaze failure data for this model.
2yr warranty
HMS5C4040BLE640
0.47% AFR vs 1.34% fleet avg
95% CI 0.15-1.09%
186 drives · ~1,072 drive-years · 5 failures · Backblaze thru Q1 2026