ST18000NM004J Seagate Exos X18 18TB SAS 256MB 3.5" Server HDD
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ST18000NM004J
High-Capacity 3.5" Enterprise SAS Nearline HDD for scale-out storage tiers with the ST18000NM004J
The ST18000NM004J is a 3.5" enterprise nearline HDD designed for modern storage servers where capacity density, predictable latency, and sustained throughput matter more than per-drive IOPS. Integrated into current x86 server and storage platforms, the 12Gb/s SAS interface aligns with dual-controller backplanes and SAS3 HBAs, enabling resilient paths and consistent behaviour under RAID and erasure-coded pools.
Within PCIe-based storage architectures, the ST18000NM004J complements NVMe tiers by extending economical capacity behind SAS expanders while maintaining deterministic write characteristics through CMR recording. Support for 512e and 4Kn Advanced Format simplifies alignment with OS and filesystem choices, and the helium-sealed design improves thermal and power efficiency for dense 4U/5U storage nodes. Hot-plug capability supports serviceability in clustered capacity nodes, backup repositories, and object storage environments that require uninterrupted operations.
Why Choose the ST18000NM004J?
The ST18000NM004J delivers a balanced density-to-reliability profile for enterprise storage layers built around RAID sets and scale-out pools, where predictable rebuild behaviour and fleet consistency are critical. With 24x7 operation rating and 2.5M hours MTBF, the ST18000NM004J supports long-running duty cycles in shared backplanes, helping architects standardise capacity nodes and scale linearly without changing the operational model.
Seagate engineers the Exos family with a focus on sustained data-centre workloads, emphasising mechanical stability, firmware tuning for multi-drive enclosures, and compatibility with enterprise SAS ecosystems. The platform approach targets repeatable behaviour across large deployments, supporting standardised qualification processes and alignment with contemporary data-centre serviceability practices.
Key Applications:
- RAID storage pools and HDD tiers
- Backup and archive repositories
- Scale-out object storage nodes
- Capacity-optimised data lake storage
At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage-node rollout and procurement cycles, and you can extend the warranty up to 6 years to protect long-term capacity investments built around the ST18000NM004J.
Technical details of ST18000NM004J
How long is the Warranty and how you can get technical support for ST18000NM004J
| 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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