Drive comparison
ST2000DM002 vs WD20EARZ
Seagate Desktop HDD 2TB and Western Digital WD Blue 2TB, compared using published manufacturer specifications.
Seagate
Desktop HDD 2TB
ST2000DM002
SATA 6 Gb/s · 3.5-inch
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Full specifications & all listings →Western Digital
WD Blue 2TB
WD20EARZ
SATA 6Gb/s · 3.5-inch
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What differs between these models?
- Interface: ST2000DM002 lists SATA 6 Gb/s; WD20EARZ lists SATA 6Gb/s.
- Sustained transfer (up to MB/s): ST2000DM002 lists 210; WD20EARZ lists 180.
A larger cache, higher RPM or higher advertised sequential speed alone does not establish which drive is better for your workload.
Specifications side by side
| Specification | ST2000DM002 | WD20EARZ |
|---|---|---|
| Manufacturer | Seagate | Western Digital |
| Product family | Desktop HDD | WD Blue |
| Model number | ST2000DM002 | WD20EARZ |
| Capacity (TB) | 2 | 2 |
| Interface | SATA 6 Gb/s | SATA 6Gb/s |
| Cache (MB) | 64 | 64 |
| Form factor | 3.5-inch | 3.5-inch |
| Average idle power (W) | 5.4 | Not recorded |
| Power-on hours per year | 2400 | Not recorded |
| Workload rating (TB/year) | 55 | Not recorded |
| Average operating power (W) | 8 | Not recorded |
| Manufacturer limited warranty | 2 years (eligible new drives) | 2 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 210 | 180 |
| RPM | Not recorded | 5400 |
| Recording | Not recorded | CMR |
| Physical sector size (bytes) | Not recorded | 4096 |
Compatibility and buying checks
- Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.
Manufacturer sources
ST2000DM002
Seagate Desktop HDD manufacturer specifications ↗ · pages 3
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
WD20EARZ
Western Digital WD Blue manufacturer datasheet ↗
Reviewed 2026-08-21. Published specifications; no independent benchmark or failure-rate claim.