Seagate Enterprise ST4000NM027B internal hard drive 4 TB 7200 RPM 256 MB 3.5 inch SAS

The Seagate Internal Hard Drive Seagate 4TB 3.5" SAS ST4000NM027B is a 4 TB enterprise-class 3.5-inch HDD with a 7200 RPM spindle speed and a 256 MB cache. Designed for continuous operation in data centers and server environments, this SAS drive delivers a balance of capacity, consistent performance and durability for demanding storage workloads. The drive is part of Seagate's Exos E series, engineered for efficient and reliable handling of unstructured data and large-scale enterprise storage deployments.

Advantages

This 4 TB SAS hard drive offers high-capacity storage with sustained 7200 RPM performance and a sizeable 256 MB buffer to smooth random and sequential I/O. The enterprise-grade design includes a high MTBF rating, making it suitable for 24/7 operation in racks and arrays. Its SAS interface provides robust connectivity and compatibility with enterprise controllers, while the 3.5" form factor supports standard server and storage chassis installations.

Suitable for

Key specifications

How to use

Install the drive into a compatible 3.5" drive bay in a server or storage enclosure that supports SAS connectivity. Ensure the host controller and firmware support the Seagate Exos series and configure the drive in the desired RAID or JBOD arrangement according to your storage design. After physical installation, initialize and format the drive in the operating system or storage controller, then migrate or store data following your standard procedures. Observe ESD precautions and follow the server vendor's guidelines for hot-swap or cold-swap insertion.

Recommendations

Use this HDD in enterprise environments where continuous operation and predictable performance are required. Pair with enterprise-grade controllers, appropriate cooling, and RAID configurations to maximize reliability. For large unstructured datasets, consider deploying these drives in capacity-optimized tiers and combine with data protection and monitoring tools to maintain availability and health.