Seagate Exos X18 12TB 3.5" 7200RPM SAS 12Gb/s HDD

The Seagate ST12000NM004J is a 12TB enterprise hard drive that balances high capacity, fast throughput, and long-term reliability. Built around a 3.5-inch platform with a SAS 12Gb/s interface, it moves data at up to 270 MB/s, giving IT teams the speed they need for heavy read-write workloads.

Inside the sealed helium enclosure, the drive spins at 7200 RPM while drawing less power than an air-filled design. This lower turbulence helps extend the expected life of the drive, which carries a 2.5 million-hour MTBF rating. A 256 MB cache keeps frequently accessed data close to the heads for quicker response times, and PowerBalance technology fine-tunes performance against energy use so racks stay cool and costs remain predictable.

For environments where data integrity is critical, the drive supports T10 DIF error detection, and Seagate Secure simplifies retirement or redeployment by enabling cryptographic erase in seconds. A five-year limited warranty underscores Seagate’s confidence in the engineering behind the Exos X18 platform.

Whether you are scaling a private cloud, expanding an object storage cluster, or refreshing a backup repository, this model fits seamlessly into servers, JBOD enclosures, and large storage arrays that require round-the-clock operation.

• 12 TB storage capacity in a standard 3.5-inch form factor
• SAS 12 Gb/s interface with sustained transfer rates up to 270 MB/s
• 7200 RPM spindle speed and 256 MB cache for responsive performance
• Helium-sealed construction that reduces power draw and internal friction
• 2.5 million-hour MTBF and five-year limited warranty for enterprise reliability
• PowerBalance feature that helps optimize energy efficiency in dense deployments
• T10 DIF support for enhanced data integrity
• Seagate Secure drive retirement capability through instant cryptographic erase