Seagate Exos X24 20TB 3.5" 7200RPM SATA III 6 Gb/s Internal HDD

Overview

The Seagate ST20000NM002H is a 3.5-inch internal hard drive designed to deliver 20 TB of storage capacity with a 7200 rpm spindle speed. It connects via a SATA III 6 Gb/s interface and offers sustained transfer rates up to 285 MB/s, supported by a 512 MB cache. This drive is built to fit seamlessly into existing server trays and storage arrays, making it a practical choice for expanding storage pools or replacing smaller drives without infrastructure changes.

Engineered for demanding environments such as hyperscale data centers, cloud storage clusters, and enterprise RAID arrays, it operates continuously with a focus on reliability and energy efficiency. The helium-sealed design reduces internal air resistance, lowering power consumption and helping maintain cooler temperatures in dense rack setups.

Key features

• Large 20 TB capacity supports extensive data storage needs for enterprise and cloud applications
• 7200 rpm spindle speed combined with a 512 MB cache enables fast access to large datasets and smooth data transfers
• Helium-sealed enclosure reduces power draw and operating temperature, enhancing drive longevity and performance in tight spaces
• Designed for continuous 24/7 operation with a mean time between failures (MTBF) of 2.5 million hours, ensuring dependable uptime
• PowerBalance technology optimizes energy efficiency per terabyte without compromising throughput, helping reduce operational costs
• SATA III 6 Gb/s interface ensures compatibility with existing enterprise backplanes and servers for easy integration

Key specs

• Capacity: 20 TB
• Form factor: 3.5 inch
• Spindle speed: 7200 rpm
• Interface: SATA III 6 Gb/s
• Cache size: 512 MB
• Sustained transfer rate: up to 285 MB/s
• Mean time between failures (MTBF): 2.5 million hours
• Enclosure: helium-sealed

Connectivity and compatibility

This hard drive uses a SATA III 6 Gb/s interface, which is widely supported across enterprise servers and storage arrays. It fits standard 3.5-inch bays, allowing straightforward installation in most rack-mounted or tower systems without requiring adapter trays or special connectors. Its compatibility with existing infrastructure makes it a convenient upgrade or expansion option for data centers and IT environments.

Performance and reliability

The combination of a 7200 rpm spindle speed and a large 512 MB cache ensures that data access and transfer remain efficient even under heavy workloads. The helium-sealed design reduces friction and heat generation, which contributes to longer drive life and stable performance in dense storage configurations. With a 2.5 million hour MTBF rating, this drive is built to handle continuous operation, making it suitable for mission-critical applications where downtime is not an option.

Ideal uses and environments

This drive is well suited to hyperscale and scale-out data centers, cloud storage clusters, and enterprise RAID arrays that require large, reliable storage pools. It supports workloads such as object storage, backup repositories, video archiving, and big-data analytics. Operators who prioritize energy efficiency and predictable operating costs will find the PowerBalance technology particularly beneficial in large installations.