Drive comparison
ST20000NM000E vs ST20000NM006H
Seagate Exos X22 20TB and Seagate Exos X24 20TB, compared using published manufacturer specifications.
Seagate
Exos X22 20TB
ST20000NM000E
SAS 12 Gb/s · 3.5-inch
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Full specifications & all listings →Seagate
Exos X24 20TB
ST20000NM006H
SAS 12 Gb/s · 3.5-inch
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What differs between these models?
- Average idle power (W): ST20000NM000E lists 5.5; ST20000NM006H lists 6.5.
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 | ST20000NM000E | ST20000NM006H |
|---|---|---|
| Manufacturer | Seagate | Seagate |
| Product family | Exos X22 | Exos X24 |
| Model number | ST20000NM000E | ST20000NM006H |
| Capacity (TB) | 20 | 20 |
| RPM | 7200 | 7200 |
| Interface | SAS 12 Gb/s | SAS 12 Gb/s |
| Cache (MB) | 512 | 512 |
| Form factor | 3.5-inch | 3.5-inch |
| Average idle power (W) | 5.5 | 6.5 |
| Power-on hours per year | 8760 | 8760 |
| Manufacturer limited warranty | 5 years (eligible new drives) | 5 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 285 | 285 |
Compatibility and buying checks
- A SAS drive requires a compatible SAS controller or backplane. A normal motherboard SATA port cannot operate a SAS drive.
- Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.
Manufacturer sources
ST20000NM000E
Seagate Exos X22 manufacturer specifications ↗ · pages 2
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
ST20000NM006H
Seagate Exos X24 manufacturer specifications ↗ · pages 3
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.