ST20000NM000D Seagate Exos X20 20TB SATA 256 MB 3.5" Server HDD

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Product line:

Exos

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€585.71

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Happyware Article Number:

SH7H6381-132194

Manufacturer Number:

ST20000NM000D

Brand:

Seagate

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Description Technical details Warranty & Technical Support Reviews Bulk Deals

ST20000NM000D

High-Density 3.5" SATA Nearline Enterprise HDD for scale-out storage with the ST20000NM000D

The ST20000NM000D is a 20TB 3.5" enterprise HDD engineered for nearline tiers in modern CPU-centric storage servers, where throughput, capacity, and predictable latency must remain consistent across large node counts. In virtualization and container platforms, this drive supports high-capacity pools behind SATA backplanes while leaving PCIe lanes and CPU resources available for NICs, accelerators, and NVMe cache layers.

Designed for sustained write behavior, ST20000NM000D uses 7200 RPM CMR recording to maintain stable performance during rebuilds, log-heavy ingestion, and long sequential transfers. Advanced Format compatibility (512e and 4Kn) enables clean alignment with contemporary filesystems and SDS stacks, while a 256MB cache and up to 285MB/s sustained transfer rate support bulk streaming and fast scan operations. For security-sensitive environments, the ST20000NM000D integrates SED encryption with Instant Secure Erase, aligning with controlled decommissioning workflows in multi-tenant racks.

Why Choose the ST20000NM000D?

The ST20000NM000D delivers a strong density-to-bay ratio for SATA storage shelves and general-purpose servers, enabling capacity growth without increasing rack footprint or power envelopes. With 24x7 duty design and a 2.5M hours MTBF rating, the ST20000NM000D is well suited for scalable deployments where predictable serviceability, hot-plug operation, and consistent fleet behavior are essential.

Seagate designs Exos platforms with an emphasis on enterprise reliability, fleet manageability, and interoperability with data center standards, including helium-sealed mechanics for controlled thermals and efficiency in dense chassis.

Key Applications:

Data center bulk storage
Backup and archive repositories
Scale-out object and file storage
NAS and SDS nodes
Cold and warm data tiers

At Happyware - Server Hardware you benefit from non-binding offers tailored to your capacity planning and node rollouts for ST20000NM000D deployments, and can secure a bulk order discount when standardizing large drive quantities across racks.

Technical details of ST20000NM000D

Capacity:

20TB

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 ST20000NM000D

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