Seagate ST20000NM007H 20TB Exos X24 3.5-Inch SAS 7200RPM HDD

Seagate Exos X24 20TB Enterprise SAS Hard Drive for Data Centers

The Seagate® Exos® X24 is engineered for demanding enterprise storage environments that need high capacity density, consistent performance, and proven platform reliability. Built on technology shipped in large volumes and deployed in leading cloud service provider solutions, Exos X24 helps scale modern infrastructure while maximizing rack-space efficiency in data centers.

This 20TB 3.5-inch SAS hard drive (ST20000NM007H) is designed for always-on operation and large-scale storage pools—from hyperscale cloud deployments to mainstream enterprise storage arrays. With helium-sealed design, CMR recording, dual-port SAS connectivity, and Seagate Secure™ Instant Secure Erase (ISE), it’s a strong fit for organizations that need scalable capacity with trusted data protection features.

Key Features of the Exos X24 20TB SAS HDD

• High-Capacity 20TB Storage: Supports massive storage growth for modern scale-out architectures and high-density RAID deployments.
• 12Gb/s SAS Interface (Dual Port): Designed for enterprise storage connectivity with dual interface ports for supported configurations.
• Helium-Sealed Drive Design: Built for high capacity density and efficient data center deployment.
• CMR Recording Technology: Conventional Magnetic Recording (CMR) for predictable performance in enterprise workloads.
• Seagate Secure™ with Instant Secure Erase (ISE): Standard model includes Instant Secure Erase (ISE) for supported secure erase workflows.
• Always-On Enterprise Reliability: Rated for 24x7 operation with a 2.5M-hour MTBF and 0.35% AFR.
• Optimized Power Management: Includes PowerChoice™ idle power technology and PowerBalance™ power/performance technology.

Best-Fit Applications

• Hyperscale / Cloud Data Centers: Scalable capacity for large infrastructure deployments.
• Massive Scale-Out Data Centers: Supports high-capacity expansion in multi-drive environments.
• Big Data Storage: Suitable for large datasets and capacity-focused storage strategies.
• High-Capacity Density RAID Storage: Built for dense RAID storage implementations.
• Enterprise External Storage Arrays: Integrates into mainstream enterprise external arrays.
• Distributed File Systems: Compatible with distributed storage environments including Hadoop and Ceph.
• Enterprise Backup & Restore: Designed for D2D and virtual tape backup workflows.
• Centralized Surveillance: Supports centralized surveillance storage deployments.

Technical Specifications

• Brand / Series: Seagate Exos X24
• Model: ST20000NM007H
• Drive Type: Enterprise HDD
• Form Factor: 3.5-inch
• Interface: SAS 12Gb/s (compatible speeds: 12.0 / 6.0 / 3.0 Gb/s)
• Capacity: 20TB
• Spindle Speed: 7200 RPM
• Cache: 512MB (multisegmented)
• Max Sustained Transfer Rate (OD): 285 MB/s (272 MiB/s)
• Random Read/Write 4K QD16 WCD (IOPS): 168 / 550
• Average Latency: 4.16 ms
• Recording Technology: CMR
• Helium Sealed-Drive Design: Yes
• Protection Information (T10 DIF): Yes
• Hot-Plug Support: Yes
• Security: Seagate Secure™ Instant Secure Erase (ISE)
• MTBF: 2,500,000 hours
• AFR (24x7): 0.35%
• Nonrecoverable Read Errors: <1 in 10E15
• Power Supply Requirements: +12V and +5V
• Idle Power (Average): 6.5W
• Max Operating Power (Random R/W 4K/16Q): 9.8W, 8.2W
• Operating Temperature: 10°C to 60°C
• Rotation Vibration (20–1500 Hz): 12.5 rad/sec²
• Shock (Operating, 2ms Read/Write): 40 Gs
• Shock (Nonoperating, 2ms): 200 Gs
• Sector Sizes: 512e (512/520/528 bytes); 4Kn (4096/4160/4224 bytes)
• Format Note: FastFormat models ship in 512e format. Switching to 4Kn using FastFormat deletes all data and requires 4K-aligned data to realize improved performance.
• Warranty: 5 Years