ST20000NM001E Seagate Exos X22 20TB SAS 512 MB 3.5" Server HDD

High-Density 3.5in Enterprise SAS HDD designed for 24/7 capacity tiers with the ST20000NM001E

The ST20000NM001E is a 20TB 3.5in internal enterprise HDD engineered for SAS backplanes in storage servers, high-density JBODs, and RAID enclosures where predictable throughput and continuous duty matter more than low-latency flash behavior. In modern CPU-hosted storage nodes, the drive aligns with PCIe-based SAS HBAs and RAID controllers, supporting scalable expansion shelves while keeping power and thermals within data centre envelopes.

With CMR recording and a helium-filled design, the ST20000NM001E sustains consistent write behavior for rebuild operations, backup windows, and large sequential streams typical of capacity tiers in SAN/NAS architectures. Adjustable 512e and 4Kn sector formats simplify integration with mixed operating systems and hypervisor stacks, while Protection Information (PI) strengthens end-to-end data integrity across controller and fabric paths. A 512MB cache and 7200 RPM profile help balance queue depth and latency under multi-initiator workloads.

Why Choose the ST20000NM001E?

The ST20000NM001E provides an enterprise-focused density-to-bay ratio that reduces rack footprint in scale-out storage, while maintaining reliability characteristics expected for always-on environments. For architects designing growth paths, the ST20000NM001E enables straightforward capacity scaling across SAS domains without changing host platforms, and supports predictable operations during RAID rebuilds and tiering workflows.

Seagate designs Exos-class drives with an emphasis on data centre operational stability, including 24/7 qualification, 2.5M hours MTBF targets, and management features such as PowerChoice and PowerBalance to support power-aware deployment standards. The ST20000NM001E also incorporates Instant Secure Erase (ISE) to streamline secure decommissioning processes.

Key Applications:

• RAID arrays and storage servers
• SAN/NAS capacity tiers
• High-density JBOD expansion shelves
• Backup and archive repositories
• Bulk CMR data lakes

At Happyware - Server Hardware you benefit from exclusive Bulk Order Discount options when standardising ST20000NM001E across multiple shelves or nodes, and can extend the warranty up to 6 years to protect long-lifecycle storage investments.