ST18000NM000D Seagate Exos X20 18TB SAS 256 MB 3.5" Server HDD

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Product line:

Exos

See all Enterprise SAS HDDs

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€689.91

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Happyware Article Number:

SH3H5892-750853

Manufacturer Number:

ST18000NM000D

Brand:

Seagate

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Description Technical details Warranty & Technical Support Reviews Bulk Deals

ST18000NM000D

High-Density 3.5in Enterprise SAS HDD for Capacity Tiers and Scale-Out Storage with the ST18000NM000D

The ST18000NM000D is a 3.5in Seagate Exos X20 enterprise HDD engineered for SAS backplanes in modern server and storage platforms where predictable bulk throughput and 24x7 duty cycles matter more than low-latency flash characteristics. In dual-controller JBODs and RAID shelves, the ST18000NM000D supports dual-port SAS paths for high availability and serviceability, aligning with capacity tiers, backup repositories, and object storage nodes.

Architecturally, the ST18000NM000D fits systems that prioritize dense bays, stable write behavior, and consistent rebuild profiles. CMR recording and a helium-sealed design support sustained mixed-workload bulk storage, while selectable 512e/4Kn sector formats simplify alignment across legacy RAID stacks and newer 4Kn-optimized filesystems. For data-path integrity in SAS domains, T10 DIF/Protection Information helps protect against silent corruption, and 256MB cache with 7200 RPM operation balances sequential ingest, replication, and RAID parity workloads.

Why Choose the ST18000NM000D?

The ST18000NM000D delivers an enterprise-focused capacity-to-bay ratio with dual-port SAS resiliency, enabling scalable deployment from single enclosures to multi-shelf pools without redesigning the storage tier. With 2.5M hours MTBF and power management features designed for continuous operation, the ST18000NM000D supports predictable lifecycle planning, large-array consistency, and operational efficiency in always-on data centre environments.

Seagate designs the Exos family around measurable reliability, controlled firmware behavior, and compatibility with standard SAS infrastructures, aligning with hot-plug service models, multi-pathing, and the operational expectations of modern rack-scale and scale-out architectures.

Key Applications:

SAS JBOD expansion shelves
RAID arrays and rebuild-intensive pools
Scale-out object storage nodes
Capacity-tier data centre servers
Backup and archive repositories

At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage topology and rollout plan, helping you standardize on the ST18000NM000D across enclosures and service tiers. For larger deployments, bulk order discount options support efficient procurement for multi-shelf expansions and phased refresh cycles.

Technical details of ST18000NM000D

Capacity:

18TB

Operating Temperature:

5 60

Form Factor:

3.5"

Interface Speed:

SAS

Rotations:

7200RPM

Cache:

256 MB

How long is the Warranty and how you can get technical support for ST18000NM000D

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