ST4000NM0125 Seagate Exos 4TB SAS 128 MB 3.5" Server HDD
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€412.58
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€412.58
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Exos
€412.58
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ST4000NM0125
High-Density 3.5in Enterprise SAS HDD for Capacity-Tier Storage with the ST4000NM0125
The ST4000NM0125 is a 4TB 3.5in internal enterprise HDD designed for SAS-based storage tiers where predictable latency, consistent write behaviour, and 24x7 duty cycles matter more than burst IOPS. In modern server platforms, the ST4000NM0125 integrates cleanly behind SAS backplanes and expander topologies, enabling straightforward scaling across multi-bay RAID arrays and high-slot-count JBOD enclosures.
Using CMR recording with 512e formatting, the ST4000NM0125 supports stable rebuild characteristics and reduced write amplification compared with SMR alternatives, which is critical when paired with RAID controllers that rely on deterministic media response. The 7200RPM spindle and onboard cache help sustain steady sequential throughput for bulk datasets, while T10 DIF and advanced write caching support end-to-end integrity and controlled write ordering in enterprise stacks. Deployed in PCIe-attached storage controllers or shared SAS fabrics, the ST4000NM0125 is optimized for capacity-tier pools, backup repositories, and archival datasets that require continuous availability.
Why Choose the ST4000NM0125?
The ST4000NM0125 provides a pragmatic density-to-performance ratio for scale-out capacity, balancing consistent CMR write behaviour with enterprise reliability for always-on operation. With a 2.0M hour MTBF profile and data integrity features suited to SAS ecosystems, the ST4000NM0125 supports repeatable deployment patterns across homogeneous drive groups, simplifying spares strategy and long-term expansion planning.
Seagate engineers the Exos line with a focus on datacentre-class endurance, predictable firmware behaviour, and compatibility with modern enclosure standards. The ST4000NM0125 aligns with enterprise operational requirements, including controlled power characteristics and thermal tolerance for dense rack storage designs.
Key Applications:
- Capacity-tier HDD pools
- RAID arrays and rebuild-intensive volumes
- JBOD enclosures with SAS expanders
- Backup repositories
- Bulk data retention and archive tiers
At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage architecture and procurement scope, helping you standardize on the ST4000NM0125 across fleets with clear planning. For larger rollouts, Bulk Order Discount options support cost-efficient scaling in JBOD and RAID deployments.
Technical details of ST4000NM0125
How long is the Warranty and how you can get technical support for ST4000NM0125
| Warranty: | 36 months (part) |
|---|---|
| RMA through customer: | yes |
| RMA Url: | https://www.seagate.com/support/warranty-and-replacements/ |
| Description: | Items must be returned first for RMA. Advanced replacement is not available. No guaranteed delivery times specified. On-site service is not offered as standard. The warranty does not cover data loss. Regular data backups are recommended |
| Support Portal: | https://support.happyware.com |
|---|
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