Seagate IronWolf Pro 20TB 3.5" 7200RPM SATA III 6 Gb/s Internal NAS HDD

The Seagate ST20000NT001 is an internal hard drive that delivers 20TB of dependable storage to Network Attached Storage systems and enterprise RAID enclosures. Built with conventional magnetic recording, the drive fits a 3.5 inch bay and is ready for continuous, round-the-clock use.

A spindle that spins at 7200 revolutions per minute, a 256 MB cache, and a SATA III 6 Gb/s interface come together to reach sustained transfer rates up to 285 MB per second. These speeds keep demanding tasks such as 4K video editing, virtualization, and large backup jobs running smoothly.

Seagate equips the IronWolf Pro line with AgileArray firmware to protect performance inside densely packed enclosures. Dual-plane balancing reduces vibration, time-limited error recovery helps RAID rebuilds finish quickly, and integrated rotation-vibration sensors monitor movement from neighboring drives.

Reliability matches the drive’s performance profile. A 550 TB-per-year workload rating and a mean time between failures of 2.5 million hours show that it is built for harsh duty cycles. A five-year limited warranty and three years of Rescue Data Recovery Service further reduce downtime risk.

This model suits creative studios needing large project libraries, small businesses running critical file servers, and home lab enthusiasts who want room to grow without sacrificing uptime.

Highlights:

• 20 TB capacity with conventional magnetic recording for consistent performance
• Spindle that spins at 7200 RPM and a 256 MB cache help sustain high throughput
• Data transfers reach up to 285 MB/s through a SATA III 6 Gb/s interface
• Rated for 550 TB of data writes per year and engineered for round-the-clock operation
• Mean time between failures of 2.5 million hours supports mission-critical workloads
• AgileArray firmware adds dual-plane balancing, time-limited error recovery, and rotation-vibration sensors for stable RAID performance
• Includes three-year Rescue Data Recovery Services
• Backed by a five-year limited manufacturer warranty