Designed to deliver performance, reliability, and dependability in multi-bay, multi-user RAID and NAS environments within commercial and enterprise settings, the 20TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD from Seagate is built to withstand 24/7 operation, or 8760 hours per year. This 20TB drive has been equipped with a SATA III 6 Gb/s interface, a rotational speed of 7200 rpm, a 3.5" form factor, and a 256MB cache, providing users with ample storage capacity with data transfer speeds of up to 285 MB/s. The IronWolf Pro also has an MTBF rating of 2.5 million hours and a workload rate of up to 550TB per year. Seagate's AgileArray technology provides dual-plane balancing, time-limited error recovery (TLER), and rotational vibration (RV) sensors to deliver enhanced RAID performance. Included is a limited 3-year Data Recovery Service that helps you retrieve damaged data in the event of a mechanical error, accident, or natural disaster, and overall protection is provided by a limited 5-year warranty.
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Key Features
- 20TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 256MB Cache
Designed to deliver performance, reliability, and dependability in multi-bay, multi-user RAID and NAS environments within commercial and enterprise settings, the 20TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD from Seagate is built to withstand 24/7 operation, or 8760 hours per year. This 20TB drive has been equipped with a SATA III 6 Gb/s interface, a rotational speed of 7200 rpm, a 3.5" form factor, and a 256MB cache, providing users with ample storage capacity with data transfer speeds of up to 285 MB/s. The IronWolf Pro also has an MTBF rating of 2.5 million hours and a workload rate of up to 550TB per year. Seagate's AgileArray technology provides dual-plane balancing, time-limited error recovery (TLER), and rotational vibration (RV) sensors to deliver enhanced RAID performance. Included is a limited 3-year Data Recovery Service that helps you retrieve damaged data in the event of a mechanical error, accident, or natural disaster, and overall protection is provided by a limited 5-year warranty.
More DetailsSeagate Pro Internal HDD Overview
High Performance
All-CMR (conventional magnetic recording) portfolio enables consistent, 24/7 performance, allowing users to access data virtually anytime, anywhere.
High Dependability
Up to a 550TB per year workload rating, a 2.5 million hours MTBF, and a limited 5-year warranty for a solid total cost of ownership (TCO).
Peace of Mind with Data Recovery
Seagate provides complimentary Rescue Data Recovery Services for three years, giving users a hassle-free, zero-cost data recovery experience.
IronWolf Health Management
Helps protect data with prevention, intervention, and recovery recommendations to ensure peak system health.
Optimized for NAS
Seagate's AgileArray technology provides dual-plane balancing, time-limited error recovery (TLER), and rotational vibration (RV) sensors to deliver top RAID performance in multi-bay environments.
UPC: 763649176252
Seagate Pro Internal HDD Specs
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Seagate Pro Internal HDD Reviews
Rock Solid NAS Drive
By Gavin
Rated 5 out of 5
Date: 2026-09-10
Been using these drives for NAS and Storage applications for years. These are great. Highly recommend these.
Great Drives Insane Price
By Noah
Rated 4 out of 5
Date: 2026-07-10
These work perfectly for my Synology. Never had one fail or let me down. That said, the current price is absolutely outrageous. Drives used to get cheaper. The price is double what it cost two years ago. This should make everyone angry.
See any errors on this page?
The 20TB version of the HDD is running a little ...
The 20TB version of the HDD is running a little hot, up to +54°C. Is that normal?
How can any electronic component have a normal operating temperature of 41 degrees Fahrenheit where normal ambient temperature of the room would be 70 degrees? The cold side of my air conditioner is not that good!
Date published: 2026-01-09
Is the Seagate 20 TB Iron Wolf Pro listed on the ...
Is the Seagate 20 TB Iron Wolf Pro listed on the Synology DS1522+ approved list?
The Seagate 20TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD (CMR), B&H # SEST20000NT1 is not on the approved drive list for the DS1522+ on Synology's website.
Date published: 2023-11-27
will this HDD work with LaCie 2big Dock 2-Bay ...
will this HDD work with LaCie 2big Dock 2-Bay Thunderbolt 3 RAID Array?
The Seagate 20TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD is not listed as a compatible internal drive and may not function properly.
Date published: 2023-05-22
Does it come with an international warranty or ...
Does it come with an international warranty or domestic only?
The warranty included with the Seagate 20TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD (CMR), B&H # SEST20000NT1, is not valid outside of the US.
Date published: 2025-01-15
I'm looking at the 20TB Seagate Ironwolf Pro ...
I'm looking at the 20TB Seagate Ironwolf Pro ST20000NT001. Does Seagate support their warranty for sales thru B&H?
Yes, the Seagate 20TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD (CMR) BH #SEST20000NT1 comes with a 5 year warranty with Seagate. We are an Authorized Seagate Dealer.
Date published: 2025-08-27
Will this drive work with a Synolgy DS1618+?
Will this drive work with a Synolgy DS1618+?
It works perfectly!!!!!!
Date published: 2024-12-20
Will this work in the UGreen NAS
Will this work in the UGreen NAS
Yes, this Seagate 24TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD is optimized for installation inside a NAS, including many of the enclosures made by UGreen.
Date published: 2025-12-23
Does OWC support these Pro versions in their exte
Does OWC support these Pro versions in their external enclosures, [Merc Elite, Thunderbay] etc without power on/off issues?
Yes. OWC products like the OWC ThunderBay 4 4-Bay Thunderbolt 3 RAID 5 Enclosure, BH #OWTB3SRKT0GB, https://bit.ly/47tfWUe, do support the Seagate 28TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD (CMR), BH #SEST28000NT0.
Date published: 2026-03-30