ST91000640NS Seagate Constellation.2 1TB SATA 64 MB 2.5" Server HDD

High-Density 2.5-inch Enterprise SATA HDD for 24/7 Server Storage with the ST91000640NS

The ST91000640NS is a 2.5-inch enterprise hard drive engineered for data centre boot volumes and general-purpose server storage where predictable latency, sustained operation, and controlled power draw matter. In modern x86 rack platforms, the ST91000640NS complements CPU- and memory-centric workloads by providing cost-efficient capacity for OS images, logs, and secondary datasets, keeping higher-cost PCIe NVMe tiers available for transactional paths.

Designed for SATA backplanes and RAID controllers, the ST91000640NS integrates cleanly into PCIe-based expansion architectures by attaching through SAS/SATA HBAs or RAID adapters while preserving broad compatibility with standard hot-swap 2.5-inch bays. A 7200 RPM mechanism with 64MB cache supports steady I/O behavior for mixed read/write server activity, and its 1TB capacity aligns well with mirrored boot pairs or capacity tiers in SATA-based RAID sets for scale-out nodes.

Why Choose the ST91000640NS?

The ST91000640NS delivers an efficient density-to-power profile for always-on infrastructure, enabling consistent deployment across fleet-standard 2.5-inch chassis without redesigning storage planes. For IT teams standardising boot and capacity tiers, the ST91000640NS supports a scalable approach to spares, RAID uniformity, and predictable lifecycle management in 24/7 environments.

Seagate designs the Constellation.2 family with enterprise reliability as a primary constraint, focusing on controlled acoustics, power characteristics, and sustained duty-cycle operation that aligns with data centre thermal and serviceability requirements. The ST91000640NS fits common operational models for clustered servers, remote hands replacement, and policy-driven maintenance windows.

Key Applications:

• Data centre boot volumes
• General-purpose server storage
• SATA-based RAID capacity tiers
• Log and telemetry retention
• Web and infrastructure services

At Happyware - Server Hardware you benefit from Bulk Order Discount options for standardising ST91000640NS deployments across racks and sites, and you can extend the warranty up to 6 years to align coverage with enterprise refresh cycles.