Designed to deliver performance, reliability, and dependability in multi-bay, multi-user RAID and NAS environments within commercial and enterprise settings, the 12TB 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 12TB 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 270 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
- 12TB 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 12TB 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 12TB 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 270 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: 763649176290
Seagate Pro Internal HDD Specs
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Seagate Pro Internal HDD Reviews
As advertised in non-retail box
By Tom
Rated 5 out of 5
Date: 2026-05-07
The hard drive disc came in non-retail box. Also, the actual HDD is also non-retail version that doesn't look like the photo. But it has correct model number on label. I used hard drive utility and verified 7200rpm. I also used HDD utility to write and verify every sector without any error.
Huge! Designed for a NAS
By Samuel
Rated 5 out of 5
Date: 2026-04-27
I am running two of these as part of the array in my Terra-Master T4-423. They replace 2-14TB drives. They slotted in and synchronized without a hitch.
See any errors on this page?
Whether it is retail packed?
Whether it is retail packed?
Yes, the Seagate 12TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD (CMR), B&H # SEST12000NT1, comes in retail packaging.
Date published: 2024-06-27
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
Is it compatible with DS718+?
Is it compatible with DS718+?
The Seagate 24TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD (CMR, Retail, 2-Pack), B&H # SEST24000N2K, is not compatible with the DS718+.
Date published: 2025-10-16
What's the difference between buying multiple ...
What's the difference between buying multiple single drives vs the 2- or 4-pack?
There is no difference between the Seagate 16TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD (CMR, Retail, 4-Pack) and single packaged versions. This bundle is just for convenience when ordering sets of drives for a NAS or DAS.
Date published: 2024-12-04
The Heading is for 48TB, but the Overview says ...
The Heading is for 48TB, but the Overview says "the 24TB IronWolf Pro 7200". Could you please check?
The Seagate IRONWLF PRO 48TB 3.5" 7200RPM SATA HDD, B&H # SEST24000N2K, is a kit that includes two Seagate 24TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDDs, B&H # SEST24000NT2.
Date published: 2024-07-14
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