ST20000NM001H Seagate Exos X24 20TB SATA 512 MB 3.5" Server HDD

High-Density 3.5in Enterprise SATA Nearline HDD architecture with the ST20000NM001H

The ST20000NM001H is a 20TB 3.5in internal enterprise HDD designed for capacity-led server platforms where CPU and GPU resources are typically allocated to applications while storage delivers predictable, high-volume throughput. In modern dual-socket x86 systems, the drive integrates cleanly into SATA backplanes and JBOD shelves, supporting large disk counts for scale-out nodes without consuming PCIe lanes needed for NICs, accelerators, or NVMe tiers.

As a CMR 7200 RPM drive with 512MB cache, the ST20000NM001H targets consistent write behavior for rebuild windows and sustained ingest. It supports 4Kn or 512e sector formatting to align with OS, HBA, and file system requirements, and it complements hybrid architectures where PCIe Gen4/Gen5 NVMe handles hot data while nearline SATA provides economical bulk capacity. Security-focused designs benefit from Self-Encrypting Drive capabilities to reduce operational friction when deploying encrypted-at-rest data at scale.

Why Choose the ST20000NM001H?

The ST20000NM001H delivers a practical density-to-power profile for rack-level storage expansion, enabling administrators to scale capacity per RU while maintaining deterministic operational characteristics for enterprise fleets. With 24x7 duty cycle engineering and a helium-sealed design, it supports predictable lifecycle management across large pools, and SED features strengthen governance for secure decommissioning and controlled key management workflows.

Seagate builds the Exos platform around sustained enterprise operation, focusing on firmware behavior, vibration-tolerant mechanics, and qualification for data centre backplanes and hot-swap service models. This approach aligns with modern standards for always-on storage, where reliability, secure handling, and consistent compatibility across controllers are mandatory.

Key Applications:

• Scale-out object storage
• File services and NAS capacity tiers
• Backup repositories and restore staging
• Nearline bulk data pools
• Content libraries and archive platforms

At Happyware - Server Hardware you benefit from non-binding offers tailored to your rollout plan for ST20000NM001H deployments, helping you standardise capacity tiers across servers and JBODs with clear procurement terms. For fleet expansions, bulk order discount options support cost-controlled scaling of ST20000NM001H volumes in enterprise environments.