Product Specifications

Seagate Exos X24 ST20000NM007H 20TB 3.5-Inch Enterprise SAS Hard Drive

Product Overview

The Seagate Exos X24 (ST20000NM007H) is a flagship enterprise-class 3.5-inch hard drive engineered for hyperscale data centres, cloud storage platforms, and mission-critical environments demanding maximum storage density and performance. With a massive 20TB storage capacity and a high-speed SAS 12Gb/s dual-port interface, this drive delivers superior throughput, full path redundancy, and outstanding long-term reliability for large-scale SAN arrays, enterprise servers, and high-density storage deployments.

As one of the highest-capacity drives in Seagate's Exos X fleet, the X24 is built on a globally proven platform deployed by leading cloud service providers worldwide. Featuring a helium-sealed CMR design, a 512MB multisegmented cache, and a 2.5 million-hour MTBF, it is purpose-built for continuous 24/7 operation in the most demanding data centre environments.

Key Features

Massive 20TB Storage Capacity

The Exos X24 delivers 20TB of enterprise-grade storage per drive, enabling organisations to maximise rack-space efficiency and achieve more petabytes per rack unit. This makes it the ideal choice for high-density deployments, cloud data centres, and massive scale-out architectures where capacity per rack is the primary constraint.

SAS 12Gb/s Dual-Port Interface with Up to 285 MB/s Transfer Rate

Equipped with a SAS III 12Gb/s dual-port interface, the drive achieves a maximum sustained data transfer rate of up to 285 MB/s, delivering significantly higher bandwidth and lower latency compared to SATA-based alternatives. The dual-port design provides complete path redundancy, making it essential for high-availability enterprise SAN storage arrays and mission-critical server environments. The drive also supports multiple interface speeds including 6.0Gb/s and 3.0Gb/s, ensuring flexibility across both legacy and modern infrastructure.

Enterprise-Grade Reliability

Rated for a workload of 550TB/year with a 2.5 million-hour MTBF and an annualised failure rate (AFR) of just 0.35%, the Exos X24 is engineered for uninterrupted, non-stop operation. It delivers 168 IOPS for random 4KB reads and 550 IOPS for random 4KB writes, while Super Parity technology and on-the-fly error-correction algorithms ensure consistent data integrity under heavy, continuous workloads.

Helium-Sealed CMR Design

The hermetically sealed helium-filled enclosure combined with Conventional Magnetic Recording (CMR) technology delivers high areal density, reduced power consumption, lower operating temperatures, and minimal vibration. The helium seal also provides enhanced robustness, durability, and leak protection — all critical advantages in dense rack-mounted server environments running 24/7.

Advanced Power Management

Seagate's PowerBalance™ and PowerChoice™ idle power technologies allow IT administrators to fine-tune the balance between performance and energy consumption, optimising watts per TB and significantly reducing total cost of ownership (TCO) at scale. Built-in digital environmental sensors further monitor and optimise power usage across hyperscale deployments.

Seagate Secure™ with Instant Secure Erase

The Exos X24 features Instant Secure Erase (ISE) for fast, safe, and cost-effective drive repurposing and disposal. Optional Self-Encrypting Drive (SED) and FIPS 140-3 validated models are available, providing government-grade data-at-rest protection and full compliance with corporate and federal security standards throughout the drive's entire lifecycle.

FastFormat™ Technology

Supporting both 512e and 4Kn sector formats, the Exos X24 includes Seagate's FastFormat™ feature, enabling easy on-the-fly reformatting between sector sizes without drive replacement — providing flexibility for evolving infrastructure requirements and ensuring compatibility with both legacy and modern enterprise systems.

Hot-Plug Support

With native hot-plug support, the Exos X24 can be inserted or removed from a live system without causing downtime, making it ideal for enterprise SAS storage arrays and high-availability server environments that require continuous, uninterrupted operation around the clock.

Best-Fit Applications

• Hyperscale cloud data centres and object storage
• Massive scale-out data centres and big data applications
• High-capacity density RAID storage arrays
• Mainstream enterprise external SAN storage arrays
• Distributed file systems including Hadoop and Ceph
• Enterprise backup, restore, and virtual tape (D2D)
• Centralised surveillance and video analytics storage

What's in the Box

• 1x Seagate Exos X24 ST20000NM007H 20TB 3.5-Inch SAS Hard Drive
• Product documentation / warranty card