Drive comparison
ST12000DM003 vs WD120EAGZ
Seagate BarraCuda 12TB and Western Digital WD Blue 12TB, compared using published manufacturer specifications.
Seagate
BarraCuda 12TB
ST12000DM003
SATA 6 Gb/s · 3.5-inch
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Western Digital
WD Blue 12TB
WD120EAGZ
SATA 6Gb/s · 3.5-inch
$445.00
Amazon US · New listing ↗ASIN B0F7MJV2X8 · as of Sep 12, 2026 10:58 UTC
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What differs between these models?
- Interface: ST12000DM003 lists SATA 6 Gb/s; WD120EAGZ lists SATA 6Gb/s.
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 | ST12000DM003 | WD120EAGZ |
|---|---|---|
| Manufacturer | Seagate | Western Digital |
| Product family | BarraCuda | WD Blue |
| Model number | ST12000DM003 | WD120EAGZ |
| Capacity (TB) | 12 | 12 |
| Interface | SATA 6 Gb/s | SATA 6Gb/s |
| Recording | CMR | CMR |
| Cache (MB) | 512 | 512 |
| Form factor | 3.5-inch | 3.5-inch |
| Load/unload cycles | 600000 | Not recorded |
| Power-on hours per year | 2400 | Not recorded |
| Workload rating (TB/year) | 120 | Not recorded |
| Manufacturer limited warranty | 2 years (eligible new drives) | 2 years (eligible new drives) |
| RPM | Not recorded | 7200 |
| Physical sector size (bytes) | Not recorded | 4096 |
| Sustained transfer (up to MB/s) | Not recorded | 260 |
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
ST12000DM003
Seagate BarraCuda manufacturer specifications ↗ · pages 2
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
WD120EAGZ
Western Digital WD Blue manufacturer datasheet ↗
Reviewed 2026-08-21. Published specifications; no independent benchmark or failure-rate claim.