ST4000NM003A Seagate Exos 7E8 4TB SAS 256 MB 3.5" Server HDD

High-Performance 3.5-inch Enterprise SAS HDD featuring CMR durability with the ST4000NM003A

The ST4000NM003A is a 3.5-inch enterprise hard drive engineered for predictable throughput and continuous duty in rack servers and storage enclosures, aligning with tiered capacity designs where cost-efficient GB/TB must still meet strict availability targets. Using a SAS single-port host interface and 512n sector format, the ST4000NM003A integrates cleanly into established HBA and RAID controller ecosystems, supporting consistent I/O behavior across mixed server generations and dense backplane topologies.

Designed for array-centric architectures, the ST4000NM003A complements CPU-led RAID and storage software stacks by delivering stable rotational performance at 7200 RPM and sustaining write characteristics through CMR recording. Its 256MB cache helps absorb bursts common in backup windows and rebuild events, while Protection Information (PI) strengthens end-to-end data integrity across the SAS path. PowerChoice power management and onboard environmental sensing support operational efficiency in scale-out nodes where PCIe resources are prioritized for networking and acceleration rather than local flash expansion.

Why Choose the ST4000NM003A?

The ST4000NM003A is suited to high-density capacity tiers where reliability and fleet consistency matter more than peak IOPS, enabling predictable planning for RAID groups, spare strategies, and service intervals. With a 2.0M-hour MTBF rating and 24/7 duty design, the ST4000NM003A supports scalable deployments from private cloud storage nodes to multi-shelf SAS arrays, while maintaining a balanced density-to-performance profile for steady-state enterprise workloads.

Seagate designs its enterprise HDD portfolio with a focus on long-life mechanics, controlled firmware behavior, and data-centre-aligned manageability, ensuring the ST4000NM003A fits standard operational processes for monitoring, replacement, and lifecycle refresh across mixed infrastructure estates.

Key Applications:

• Enterprise HDD tier storage
• RAID arrays and JBOD shelves
• Backup and archive repositories
• Scale-out file storage
• Object storage nodes
• Private cloud capacity tiers

At Happyware - Server Hardware you benefit from responsive 24/7 customer service to support platform compatibility checks and rollout timing for ST4000NM003A volume deployments, and you can secure a non-binding offer tailored to your required quantities and delivery schedule.