Drive comparison
ST4000DM000 vs WD40EZAX
Seagate Desktop HDD 4TB and Western Digital WD Blue 4TB, compared using published manufacturer specifications.
Seagate
Desktop HDD 4TB
ST4000DM000
SATA 6 Gb/s · 3.5-inch
$181.00
Amazon US · New listing ↗ASIN B07XL6WHMM · as of Sep 12, 2026 11:46 UTC
Full specifications & all listings →Western Digital
WD Blue 4TB
WD40EZAX
SATA 6Gb/s · 3.5-inch
Check current Amazon price
Amazon US · Used / renewed listing ↗ASIN B0CX5LX5GJ
Full specifications & all listings →As an Amazon Associate I earn from qualifying purchases. Match the selected variant, condition and seller terms before ordering.
What differs between these models?
- Interface: ST4000DM000 lists SATA 6 Gb/s; WD40EZAX lists SATA 6Gb/s.
- Cache (MB): ST4000DM000 lists 64; WD40EZAX lists 256.
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 | ST4000DM000 | WD40EZAX |
|---|---|---|
| Manufacturer | Seagate | Western Digital |
| Product family | Desktop HDD | WD Blue |
| Model number | ST4000DM000 | WD40EZAX |
| Capacity (TB) | 4 | 4 |
| Interface | SATA 6 Gb/s | SATA 6Gb/s |
| Cache (MB) | 64 | 256 |
| Form factor | 3.5-inch | 3.5-inch |
| Load/unload cycles | 300000 | Not recorded |
| Average idle power (W) | 4 | Not recorded |
| Power-on hours per year | 2400 | Not recorded |
| Workload rating (TB/year) | 55 | Not recorded |
| Average operating power (W) | 5.6 | Not recorded |
| Manufacturer limited warranty | 2 years (eligible new drives) | 2 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 180 | 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
ST4000DM000
Seagate Desktop HDD manufacturer specifications ↗ · pages 2
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
WD40EZAX
Western Digital WD Blue manufacturer datasheet ↗
Reviewed 2026-08-21. Published specifications; no independent benchmark or failure-rate claim.