Seagate Exos X18 18TB 3.5" 7200RPM SATA III 6 Gb/s Internal HDD

The Seagate ST18000NM000J is an 18 TB hard drive built for organizations that require dependable, large scale storage. Based on the Exos X18 platform, it slides into any standard 3.5 inch bay and connects through a SATA III 6 Gb/s interface, so expanding a single server or an entire rack is straightforward.

In daily operation the drive sustains up to 270 MB/s, allowing backups, analytics jobs, and content delivery tasks to complete quickly. A 256 MB cache smooths burst traffic, while the 7200 RPM spindle speed keeps latency predictable across the entire capacity.

Reliability sits at the core of the design. A helium-sealed enclosure cuts internal friction, lowers power draw, and reduces vibration. Digital sensors continuously read thermal and environmental conditions, adjusting operation to protect the drive. With a 2.5 million-hour MTBF rating and certification for 24 / 7 workloads, it withstands the rigorous schedules common in data centers.

Administrators running dense racks, private clouds, or large scale backup arrays will appreciate the balance of capacity and efficiency. PowerBalance technology helps trim watts per terabyte, easing energy budgets in tightly packed environments. Whether archiving video, operating distributed file systems, or scaling object storage, this drive provides room to grow without compromising uptime.

• 18 TB native capacity with up to 270 MB/s sustained throughput
• Fits a standard 3.5 inch bay, spins at 7200 RPM, connects via SATA III 6 Gb/s, and includes a 256 MB cache
• 2.5 million-hour MTBF and support for continuous 24 / 7 operation
• Helium-sealed construction reduces power use and limits vibration
• PowerBalance feature fine-tunes energy consumption per terabyte
• On-board thermal and environmental sensors safeguard performance in dense racks