Seagate
Seagate IronWolf Pro
Bottom line: The Seagate IronWolf Pro ($879.99 on Amazon as of 2026-10-21 12:20 UTC): All-CMR recording avoids SMR write cliffs during RAID rebuilds; main trade-off: 7,200 RPM platters are audible in a living-space NAS.
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*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
Pros & Cons
Pros
- ✓ All-CMR recording avoids SMR write cliffs during RAID rebuilds
- ✓ 550TB/year workload rating with 2.5M hours MTBF for 24x7 duty
- ✓ 5-year limited warranty plus 3 years Rescue Data Recovery included
- ✓ RV sensors and TLER keep the drive from dropping out of multi-bay arrays
- ✓ 7.7W average operating power keeps a populated NAS bay cooler
Cons
- ✗ 7,200 RPM platters are audible in a living-space NAS
- ✗ Designed for NAS/RAID, not ideal as a desktop or boot drive
- ✗ Seagate notes compatible hardware and setup may be required
Manufacturer description
High Performance: All-CMR (conventional magnetic recording) portfolio enables consistent, industry-leading 24×7 performance allowing users to access data anytime, anywhere.Average Operating Power (W) - 7.7W, Operating Temperature (drive reported, max °C) : 65, Operating Temperature (ambient, min °C) : 0 Class-Leading Dependability: Up to 550TB/year workload rating, 2.5M hours MTBF, and 5-year limited warranty for unparalleled total cost of ownership (TCO) Peace of Mind with Data Recovery: Complimentary 3 year Rescue Data Recovery Services for a hassle-free, zero-cost data recovery experience
SpecPicks Verdict
SpecPicks scored Seagate IronWolf Pro using a rating × review-volume × price-fit model applied to published specs and reviews across the nas & home servers category. Seagate's nas & home servers lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for nas & home servers of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Is the IronWolf Pro 20TB CMR or SMR?
It is CMR. Seagate builds the IronWolf Pro line as an all-CMR (conventional magnetic recording) portfolio, so there is no shingled-write penalty on sustained writes or RAID rebuilds.
What workload rating and MTBF does this drive carry?
Seagate rates it for up to 550TB/year of workload and 2.5M hours MTBF, which is why it is specified for 24x7 operation in multi-bay NAS enclosures.
What warranty and data recovery coverage is included?
A 5-year limited warranty, plus three years of complimentary Rescue Data Recovery Services. Check the product listing for current terms in your region.
How much power does it draw and how hot can it run?
Average operating power is 7.7W. Seagate lists a drive-reported maximum operating temperature of 65 C and a minimum ambient operating temperature of 0 C.
Will this work in any NAS or in a regular desktop PC?
It uses a standard 3.5-inch SATA 6 Gb/s connection, but Seagate designs it for NAS and RAID systems and advises testing in a compatible NAS or RAID environment first.
Key Features
- High Performance: All-CMR (conventional magnetic recording) portfolio enables consistent, industry-leading 24×7 performance allowing users to access data anytime, anywhere.Average Operating Power (W) - 7.7W, Operating Temperature (drive reported, max °C) : 65, Operating Temperature (ambient, min °C) : 0
- Class-Leading Dependability: Up to 550TB/year workload rating, 2.5M hours MTBF, and 5-year limited warranty for unparalleled total cost of ownership (TCO)
- Peace of Mind with Data Recovery: Complimentary 3 year Rescue Data Recovery Services for 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: AgileArray with dual-plane balancing, time-limited error recovery (TLER), and rotational vibration (RV) sensors to deliver top RAID performance in multi-bay environments
- The available storage capacity may vary.
Full Specifications
| Size | 20TB |
|---|---|
| Brand | Seagate |
| Color | Black |
| Model | ST20000NTZ01 |
| Warranty | 5-Year-Manufacturer |
| UnitCount | 1 |
| ReleaseDate | 2022-08-22T00:00:01Z |
| Manufacturer | Seagate |
| ItemPartNumber | ST20000NT001 |
| Full listing title | Seagate IronWolf Pro, 20 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage (ST20000NT001) |
Ready to buy?
Seagate IronWolf Pro, 20 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage (ST20000NT001) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
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