ST20000NM005H Seagate Exos X24 20TB SAS 512 MB 3.5" Server HDD

High-Density 3.5-inch Nearline SAS Enterprise HDD for capacity-tier storage with the ST20000NM005H

The ST20000NM005H is a 20TB nearline enterprise HDD engineered for 24/7 duty in modern storage nodes where CPU and memory resources are optimized for throughput, rebuild efficiency, and metadata services rather than hot data. In RAID shelves and scale-out clusters, the drive complements x86 platforms with DDR4/DDR5 memory by sustaining predictable sequential performance for large object and file workloads while keeping $/TB and power per TB controlled.

With a 12Gb/s SAS interface and single-port connectivity, ST20000NM005H integrates cleanly into SAS expanders and storage backplanes, enabling dense JBOD designs and controller-attached arrays without consuming PCIe lanes required for NVMe tiers or network adapters. Support for 512e and 4Kn sector formats helps align logical blocks to filesystem and application requirements, reducing write amplification in archival and repository patterns while preserving interoperability across heterogeneous fleets.

Why Choose the ST20000NM005H?

The ST20000NM005H targets capacity-first architectures that need high drive-count scalability with enterprise reliability characteristics. Helium-filled mechanics and a humidity sensor support stable operation in densely packed enclosures, while Protection Information (PI) strengthens end-to-end data integrity in SAS ecosystems. For controlled decommissioning and redeployment, Instant Secure Erase (ISE) enables faster sanitization workflows that fit governed data-centre processes.

Seagate designs its Exos platform around consistent fleet behavior, long service life, and standards-based integration into multi-vendor storage stacks. The ST20000NM005H aligns with enterprise monitoring and maintenance practices, providing the operational predictability required for RAID groups, shared storage shelves, and scale-out object stores under continuous load.

Key Applications:

• Capacity-tier enterprise storage
• Backup and archive repositories
• Ceph and object storage clusters
• HDFS-compatible platforms
• RAID arrays and shared storage shelves

At Happyware - Server Hardware you benefit from non-binding offers tailored precisely to your storage build-out using the ST20000NM005H, and from bulk order discounts that support standardized deployments across racks, pods, and spare-part pools.