Seagate IronWolf Pro
Status: Seagate IronWolf Pro: Unavailable on Amazon as of . SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.
Bottom line: The Seagate IronWolf Pro: All-CMR recording keeps sustained write speed steady during RAID rebuilds; main trade-off: 4TB is small per bay; larger IronWolf Pro capacities cost less per terabyte.
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Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives:
Similar: Seagate 4TB IronWolf NAS SATA Hard Drive 6Gb/s… — $184.95 on Amazon as of 2026-10-21 04:16 UTC (price may vary).
Similar: Seagate IronWolf 8TB NAS Internal Hard Drive HDD — $329.99 on Amazon as of 2026-10-21 12:20 UTC (price may vary).
Similar: Seagate IronWolf Pro 14TB NAS Internal Hard… — $634.45 on Amazon as of 2026-10-21 10:15 UTC (price may vary).
Pros & Cons
Pros
- ✓ All-CMR recording keeps sustained write speed steady during RAID rebuilds
- ✓ 550TB/year workload rating and 2.5M-hour MTBF for true 24x7 duty
- ✓ 5-year limited warranty plus 3 years free Rescue Data Recovery
- ✓ TLER prevents the drive being dropped from RAID on slow sectors
- ✓ RV sensors and dual-plane balancing stabilize multi-bay chassis performance
Cons
- ✗ 4TB is small per bay; larger IronWolf Pro capacities cost less per terabyte
- ✗ 7,200 RPM spinning platter means audible noise and more heat than SSDs
- ✗ IronWolf Health Management needs a supported NAS to be useful
Manufacturer description
The Seagate IronWolf Pro 4TB (ST4000NT001) is built for multi-bay NAS and RAID arrays that never power down. It runs at 7,200 RPM over SATA 6 Gb/s with a 256 MB cache and uses all-CMR conventional magnetic recording, so sustained writes stay consistent instead of collapsing the way shingled drives do under heavy RAID rebuilds. Seagate rates it for 24x7 duty with a workload ceiling of 550 TB per year and 2.5 million hours MTBF, which puts it squarely in enterprise territory rather than desktop-drive territory. AgileArray firmware handles the multi-drive details: dual-plane balancing…
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. Compare with similarly-priced alternatives in the nas & home servers category before committing. 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 Seagate IronWolf Pro 4TB CMR or SMR?
It is all-CMR (conventional magnetic recording). Seagate keeps the entire IronWolf Pro line CMR, which is why sustained writes and RAID rebuilds stay consistent.
What warranty comes with the ST4000NT001?
A five-year limited warranty, plus three years of complimentary Rescue Data Recovery Services included at no extra cost. Check the product listing for current terms in your region.
How many drives can I run in one NAS with this model?
It is engineered for multi-bay commercial and enterprise RAID arrays, with rotational vibration sensors and dual-plane balancing specifically for multi-drive chassis. Confirm bay limits with your NAS vendor.
What is the workload rating and is it rated for 24x7 use?
Up to 550TB per year, with 2.5 million hours MTBF, and it is rated for continuous 24x7 operation rather than desktop duty cycles.
Key Features
- High Performance: All-CMR (conventional magnetic recording) portfolio enables consistent, industry-leading 24×7 performance allowing users to access data anytime, anywhere
- 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
Full Specifications
| Brand | Seagate |
|---|---|
| Color | NAS PRO |
| Model Name | ST4000NT001 |
| Read Speed | 6 gigabytes_per_second |
| Unit Count | 1 Count |
| Form Factor | 3.5-inch |
| Media Speed | 190 MB/s |
| Model Number | ST4000NT001 |
| Built-In Media | IronWolf™ Pro 4TB SATA |
| Hard-Drive Size | 4 TB |
| Mfr Part Number | ST4000NT001 |
| Number of Items | 1 |
| Special Feature | Portable |
| Vibration/Rumble | Yes |
| Installation Type | Internal Hard Drive |
| Compatible Devices | Laptop |
| Data Transfer Rate | 5000 megabytes_per_second |
| Enclosure Material | Aluminum/Glass |
| Additional Features | Portable |
| Hard Disk Interface | Serial ATA |
| Full listing title | Seagate IronWolf Pro, 4 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage (ST4000NT001) |
Ready to buy?
Amazon shows no buyable offer for Seagate IronWolf Pro at the last check. A similar in-stock product is Seagate 4TB IronWolf NAS SATA Hard Drive 6Gb/s…. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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