Seagate Enterprise 4TB 3.5" 7200RPM SAS 6Gb/s HDD

Overview

The Seagate ST4000NM0125 is a 4TB enterprise hard drive designed for high-demand server and storage array environments. It features a 7200 RPM spindle speed and a 12 Gb/s SAS interface that supports dual-port connectivity, ensuring reliable and fast data access in multi-drive configurations. With a 128 MB cache and conventional magnetic recording, this drive maintains consistent performance across its entire platter, making it well suited for continuous 24/7 operation in data centers and enterprise storage solutions.

Key features

• Dual-port 12 Gb/s SAS interface provides high bandwidth and redundancy for critical storage systems
• 7200 RPM spindle speed combined with dual on-board processors and a 128 MB cache to optimize data throughput and reduce latency
• Designed for continuous operation with a workload rating of up to 550 TB per year, supporting demanding virtualisation and analytics workloads
• Conventional magnetic recording technology ensures stable and predictable performance in high-density storage arrays
• Seagate Secure firmware with Instant Secure Erase enables quick and secure drive decommissioning without lengthy data overwrite processes
• Motor anchored to the top cover reduces vibration, preserving performance in densely packed server racks

Key specs

• Capacity: 4 TB
• Form factor: 3.5 inch
• Interface: 12 Gb/s SAS dual-port
• Spindle speed: 7200 RPM
• Cache size: 128 MB
• Sector format: 512e
• Workload rating: 550 TB per year

Connectivity and compatibility

This drive’s 12 Gb/s SAS interface supports dual-port connectivity, which is essential for enterprise environments requiring high availability and failover capabilities. The 512e sector format ensures broad compatibility with current RAID controllers and replication software, making it a straightforward choice for integration into existing storage infrastructures.

Performance and reliability

Engineered for continuous 24/7 operation, the ST4000NM0125 handles heavy workloads without compromising data integrity or speed. Its dual processors and large cache help maintain smooth data flow even when multiple drives operate simultaneously in a chassis. The vibration-reducing motor design further enhances reliability by minimizing performance degradation in dense server racks.

Ideal uses and environments

This hard drive fits well in enterprise storage arrays, virtualisation clusters, content streaming pools, backup targets, and analytics nodes. It is a strong choice for IT teams looking to expand file servers, build high-capacity RAID sets, or refresh drives in data-intensive applications where endurance and secure data handling are priorities.