Seagate

Seagate IronWolf

Status: Seagate IronWolf (12TB hard drive): Unavailable on Amazon as of 2026-10-18 20:24 UTC. Closest in-stock match (same 12TB hard drive): Seagate IronWolf Pro 12TB NAS Internal Hard…, $644.45 on Amazon as of 2026-10-21 10:15 UTC (price may vary). eBay sellers may still list this model new or used.

View Current Price — $644.45 🛒 Search eBay for this model

Bottom line: The Seagate IronWolf: All-CMR recording for consistent 24x7 performance in RAID arrays; main trade-off: 7,200 RPM drives typically run louder and warmer than slower NAS drives.

Unavailable on Amazon as of 2026-10-18 20:24 UTC

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Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives with matching specs:

Same 12TB hard drive: Seagate IronWolf Pro 12TB NAS Internal Hard… — $644.45 on Amazon as of 2026-10-21 10:15 UTC (price may vary).

View Current Price — $644.45

Same 12TB hard drive: Seagate Skyhawk 12TB Surveillance Internal Hard… — $573.60 on Amazon as of 2026-10-21 04:20 UTC (price may vary).

View Current Price — $573.60

Same 12TB hard drive: HGST - WD Ultrastar DC HC520 HDD — $339.49 on Amazon as of 2026-10-21 04:20 UTC (price may vary).

View Current Price — $339.49

Original listing (currently unavailable) → Compare to similar external storage

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-19

Mike Perry — Hardware researcher since 2014. For external drives and portable storage, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Pros & Cons

Pros

✓ All-CMR recording for consistent 24x7 performance in RAID arrays
✓ Rated for up to 550 TB/year workload and 2.5M hours MTBF
✓ 5-year limited warranty plus 3 years of Rescue Data Recovery Services
✓ Rotational vibration sensors and TLER tuned for multi-bay NAS enclosures
✓ 7,200 RPM spindle with 256 MB cache on a SATA 6Gb/s interface

Cons

✗ 7,200 RPM drives typically run louder and warmer than slower NAS drives
✗ SATA 6Gb/s spinning disk is far slower than SSD storage for random access
✗ Health Management features depend on support in your NAS software
✗ Enterprise workload rating is more than a single-drive desktop needs

Manufacturer description

The Seagate IronWolf Pro 12TB (ST12000NTZ01) is a 3.5-inch internal NAS hard drive for multi-bay RAID systems that run around the clock. Every IronWolf Pro drive uses CMR (conventional magnetic recording), so you get steady performance under the constant reads and writes of a busy NAS. It spins at 7,200 RPM, has a 256 MB cache, and connects over SATA 6Gb/s. The drive is rated for workloads of up to 550 TB per year and has a 2.5-million-hour MTBF. Both figures point to small-business file servers, surveillance archives and shared media libraries rather than a lightly used desktop. Seagate's…

SpecPicks Verdict

SpecPicks scored Seagate IronWolf using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. Seagate's external storage 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 external storage 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

Does the Seagate IronWolf Pro 12TB use CMR or SMR recording?

It uses CMR (conventional magnetic recording). Seagate builds every IronWolf Pro drive with CMR for consistent performance in RAID and multi-user NAS setups.

What are the main specs of the ST12000NTZ01?

It is a 12TB, 3.5-inch internal hard drive with a SATA 6Gb/s interface, a 7,200 RPM spindle speed and a 256 MB cache.

How long is the warranty, and is data recovery included?

The drive has a 5-year limited warranty. It also includes 3 years of Rescue Data Recovery Services at no extra cost. Check Seagate's terms for how to file a claim.

Is the IronWolf Pro 12TB a good fit for a multi-bay RAID NAS?

Yes. AgileArray firmware handles dual-plane balancing and time-limited error recovery (TLER), and rotational vibration sensors help keep performance steady when several drives run together in one enclosure.

How much continuous use is this drive rated for?

Seagate rates it for 24x7 operation, a workload of up to 550 TB per year and a 2.5-million-hour MTBF. That suits always-on file servers and backup targets.

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 550 TB/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
Optimised 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	HDD
Model Name	Seagate IronWolf Pro
Unit Count	1.0 Count
Form Factor	3.5-inch
Media Speed	200-250 MB/s
Model Number	ST12000NTZ01
Built-In Media	Actual capacity may vary., IronWolf Pro HDD
Item Type Name	IronWolf Pro Refresh
Hard-Drive Size	12 TB
Number of Items	1
Special Feature	Portable
Vibration/Rumble	Yes
Installation Type	Internal Hard Drive
Compatible Devices	Desktop, Laptop, Game Console, Server
Data Transfer Rate	214 Megabits Per Second
Enclosure Material	Aluminum/Glass
Additional Features	Portable
Hard Disk Interface	SATA 6 GB/s
Customer Package Type	Frustration Free Packaging
Full listing title	Seagate IronWolf, Pro 12TB, Enterprise Internal NAS HDD – CMR 3.5 Inch, SATA 6GB/s, 7,200 RPM, 256 MB Cache for RAID NAS - Frustration Free Packaging (ST12000NTZ01)

Ready to buy?

Amazon shows no buyable offer for Seagate IronWolf at the last check. The closest in-stock match with the same 12TB hard drive is Seagate IronWolf Pro 12TB NAS Internal Hard…. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Current Price — $644.45