ST4000NM005A Seagate Exos 7E8 4TB SAS 256 MB 3.5" Server HDD

High-Density 3.5-inch Enterprise SAS HDD for 24x7 Capacity Tiers with the ST4000NM005A

The ST4000NM005A is a 4TB 3.5-inch internal enterprise HDD engineered for SAS backplanes in rack servers and storage shelves where predictable latency and sustained throughput matter more than burst IOPS. Deployed behind modern CPU platforms and RAID/HBA controllers, the ST4000NM005A leverages a dual-port SAS interface to support multipath connectivity for high availability, aligning with redundant expander topologies in JBOD and shared-disk architectures.

For capacity-centric virtualisation clusters and general-purpose storage tiers, the ST4000NM005A combines 7200 RPM mechanics, 256MB cache, and CMR media to keep write behaviour consistent during long sequential transfers and rebuild windows. Advanced Format 4K (512e) sectoring and enterprise firmware features are designed to integrate cleanly with RAID sets, while data integrity capabilities such as T10 DIF/PI help protect end-to-end payloads across PCIe-attached SAS controllers and enclosure interconnects.

Why Choose the ST4000NM005A?

The ST4000NM005A delivers a balanced density-to-performance profile for scalable SAS pools, providing dual-port resilience for serviceable, always-on storage domains. With support for continuous 24x7 duty cycles and enterprise rebuild optimisations, the ST4000NM005A is suited to standardised drive populations where operational consistency, predictable rebuild behaviour, and fleet-level reliability reduce risk in expansion and refresh planning.

Seagate designs the Exos family around data centre operating discipline, focusing on sustained workload capability, integrity controls, and compatibility with common SAS infrastructure standards. This engineering approach supports stable behaviour in RAID and JBOD deployments and aligns with enterprise validation practices for temperature, power, and lifecycle management.

Key Applications:

• SAS JBOD storage shelves
• RAID arrays in rack servers
• Capacity tier for virtualisation
• General-purpose file and block storage
• Backup and archive repositories

At Happyware - Server Hardware you benefit from non-binding offers tailored to your storage shelf or server build, enabling precise drive population planning for the ST4000NM005A. For larger rollouts, bulk order discounts support cost-effective standardisation across fleets and refresh cycles.