Seagate ST20000NM002H Exos X24 20TB SATA 7200RPM 3.5" Enterprise HDD

Seagate Exos X24 20TB Enterprise 3.5-Inch SATA Hard Drive (ST20000NM002H)

The Seagate® Exos® X24 20TB hard drive is built for high-density enterprise storage where capacity, performance, and reliability matter. Designed for scalable data center environments, this 3.5-inch SATA HDD helps maximize rack-space efficiency while delivering the consistent throughput needed for modern cloud and on-prem infrastructures.

With a helium-sealed design and CMR recording, the Exos X24 is well-suited for large-scale deployments such as hyperscale applications, big data platforms, and high-capacity RAID storage. This Standard Model includes Seagate Instant Secure Erase (ISE), supporting secure drive sanitization workflows for organizations that prioritize data protection and lifecycle management.

Key Features

• 20TB Capacity for Data Centers: High capacity designed for scalable hyperscale and enterprise storage environments.
• Helium-Sealed Drive Design: Supports efficient, high-density 3.5-inch deployments.
• CMR Recording Technology: Conventional Magnetic Recording (CMR) for predictable performance in RAID and enterprise workloads.
• Seagate Instant Secure Erase (ISE): Supports secure erase capability for compliant decommissioning and redeployment workflows.
• Enterprise-Grade Reliability: Rated for 24/7 operation with a 2,500,000-hour MTBF and 0.35% AFR.
• Strong Sustained Performance: 7200RPM spindle speed with up to 285MB/s max sustained transfer rate (OD).
• 512MB Cache: Multisegmented cache helps optimize responsiveness for demanding read/write activity.
• Power Efficiency Tools: PowerChoice™ idle power technology and PowerBalance™ power/performance technology.
• Data Integrity & Firmware Security: RSA 3072 firmware verification (SD and D) and Super Parity support.

Technical Specifications

• Model: ST20000NM002H
• Series: Exos X24
• Interface: SATA 6Gb/s (supports 6.0, 3.0 Gb/s)
• Form Factor: 3.5-inch
• Capacity: 20TB
• Spindle Speed: 7200RPM
• Cache: 512MB (multisegmented)
• Max Sustained Transfer Rate (OD): 285MB/s (272 MiB/s)
• Random Read/Write 4K QD16 WCD (IOPS): 168 / 550
• Average Latency: 4.16ms
• Interface Ports: Single
• Sector Formats: 512e and 4Kn (4096 bytes/sector)
• MTBF: 2,500,000 hours
• AFR (24/7): 0.35%
• Nonrecoverable Read Errors: <1 in 10E15
• Operating Temperature: 50°F to 140°F (10°C to 60°C)
• Power Requirements: +12V and +5V
• Idle Power (Average): 6.3W
• Max Operating Power (Random 4K/16Q): 8.9W (read), 7.1W (write)
• Hot-Plug Support: Yes
• Low Halogen: Yes

Best-Fit Applications

• Cloud & Hyperscale Data Centers: Designed for massive scale-out environments.
• High-Capacity RAID Storage: Predictable performance for dense enterprise arrays.
• Big Data & Distributed File Systems: Suitable for Hadoop and Ceph-style storage architectures.
• Backup & Restore: Enterprise D2D and virtual tape workflows.
• Centralized Surveillance: High capacity for long retention periods.