ST18000NM003D Seagate Exos X20 18TB SATA 256 MB 3.5" Server HDD

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Product line:

Exos

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€433.71

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Happyware Article Number:

SH1H2757-117937

Manufacturer Number:

ST18000NM003D

Brand:

Seagate

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Description Technical details Warranty & Technical Support Reviews Bulk Deals

ST18000NM003D

High-Capacity 3.5in Enterprise SATA HDD for capacity-optimised storage tiers with the ST18000NM003D

The ST18000NM003D is a 3.5in enterprise HDD engineered for modern x86 and ARM server platforms where CPU and memory resources are allocated to data services while storage is scaled for predictable throughput and maximum $/TB. In capacity-optimised nodes, the ST18000NM003D complements high-core-count processors and large DDR4/DDR5 memory pools by extending durable nearline capacity without consuming PCIe lanes required for NICs, DPUs, or NVMe cache.

Designed for SATA backplanes and hot-plug serviceability, the ST18000NM003D integrates cleanly into 12Gb/s SAS expanders via SATA interposers and into dense JBOD shelves for scale-out architectures. CMR recording supports consistent write behaviour for RAID rebuilds and object storage ingestion, while 512e/4Kn Advanced Format enables alignment with modern filesystems and sector-size standardisation across mixed fleets. A 256MB cache and 7200RPM profile target steady sequential workloads typical of backup repositories, capacity NAS/SAN tiers, and bulk data lakes.

Why Choose the ST18000NM003D?

The ST18000NM003D delivers a practical density-to-serviceability balance for large arrays where uptime, controlled rebuild characteristics, and fleet consistency matter more than peak IOPS. With enterprise MTBF targets and an operating envelope suited to continuous duty, the ST18000NM003D scales from single-node RAID sets to multi-shelf object storage while maintaining predictable operational behaviour.

Seagate designs Exos-class drives with a focus on sustained workload integrity, helium-sealed efficiency, and data centre compliance expectations such as low-halogen materials. This engineering approach supports long-lived deployments, controlled power profiles, and consistent thermal operation in standard rack and JBOD environments.

Key Applications:

Data centre bulk storage
Backup and archive repositories
Scale-out object storage
Nearline NAS/SAN capacity tiers
RAID arrays and JBOD shelves

At Happyware - Server Hardware you benefit from non-binding offers tailored to your rollout quantities for the ST18000NM003D and can secure a bulk order discount to standardise capacity tiers across racks and sites with controlled procurement.

Technical details of ST18000NM003D

Capacity:

18TB

Operating Temperature:

5 60

Form Factor:

3.5"

Interface Speed:

SATA

Rotations:

7200RPM

Cache:

256 MB

How long is the Warranty and how you can get technical support for ST18000NM003D

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