ST4000NM0255 Seagate Exos 7E8 4TB SAS 128 MB 3.5" Server HDD

High-Density 3.5-inch Enterprise SAS HDD for RAID and bulk storage with the ST4000NM0255

The ST4000NM0255 is a 3.5-inch Seagate Exos enterprise HDD engineered for 12Gb/s SAS backplanes in modern 2U/4U servers, storage enclosures, and JBOD shelves where predictable latency and sustained throughput matter more than burst performance. By using CMR recording with 7200 RPM mechanics, the ST4000NM0255 maintains stable write behavior under rebuild pressure, making it a dependable foundation for RAID groups and capacity tiers.

In SAS architectures, the ST4000NM0255 aligns cleanly with dual-port, multipath designs and controller-class caching, while 512e sector formatting supports broad OS and hypervisor compatibility in mixed fleets. PowerChoice features help operators tune idle and active profiles to enclosure thermals and power budgets, and environmental monitoring such as humidity sensor support adds an additional control point for high-density deployments. For data-at-rest protection, the ST4000NM0255 integrates SED encryption with Secure Erase and Protection Information to support integrity-aware storage stacks.

Why Choose the ST4000NM0255?

The ST4000NM0255 provides an efficient density-to-slot profile for bulk capacity while remaining optimized for 24/7 duty cycles in shared storage domains. With enterprise reliability targets and a 12Gb/s SAS interface suited to scalable expanders, the ST4000NM0255 enables consistent growth of RAID arrays and backup tiers without changing the enclosure standard or operational processes.

Seagate designs the Exos platform with a focus on predictable behavior under sustained workloads, comprehensive validation for enterprise SAS ecosystems, and field-proven reliability practices aligned with data center serviceability requirements. The ST4000NM0255 is built to integrate into standardized monitoring, maintenance, and secure decommissioning procedures.

Key Applications:

• Data center bulk storage tiers
• RAID arrays in servers and storage enclosures
• SAS JBOD expansion shelves
• Enterprise backup and archive repositories
• Capacity-oriented virtualization datastores

At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage expansion plan for ST4000NM0255 deployments, and from bulk order discount options when standardizing large RAID or JBOD rollouts across racks and sites.