Seagate 20TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD (CMR) Review
We've aggregated 10 high-signal reviews and 1 live retailer price below.

Our editorial take on the Seagate 20TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD (CMR)
The Seagate IronWolf Pro 20TB drive solidly establishes itself as a go-to solution for serious NAS users who prioritize massive capacity and consistent performance. This is not a drive for a casual desktop setup. It's engineered specifically for the rigors of 24/7 operation inside multi-bay NAS enclosures, utilizing Conventional Magnetic Recording (CMR) technology to ensure reliable performance in demanding RAID configurations. For creative professionals, small businesses, or data-heavy prosumers, the ability to consolidate storage and maximize bay capacity with these drives is a significant advantage.
Performance is impressive, with the 7200 rpm spindle speed delivering the fast, sustained transfer rates necessary for tasks like direct video editing or managing huge photo libraries across a network. This performance comes with predictable trade-offs, namely higher operational noise and heat output compared to slower, lower-capacity drives, which is a standard consideration for any high-performance array. What truly sets the Pro line apart is the included peace of mind. Seagate's complimentary multi-year Rescue Data Recovery Services and robust workload rating offer a level of assurance that aligns perfectly with the mission-critical data these drives are intended to store.
- Massive 20TB capacity maximizes storage density
- Excellent sustained transfer speeds for large files
- Uses reliable CMR technology, ideal for RAID arrays
- Built for high-workload, 24/7 NAS environments
- Includes two years of Rescue Data Recovery Services
- Premium price point compared to smaller drives
- Runs hotter and louder than 5400 rpm alternatives
- Power consumption is higher than lower-capacity models
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Specs
- Weight
- 1.5 lb / 670 g
- Dimensions
- 5.79 x 4.01 x 1.03" / 146.99 x 101.85 x 26.11 mm
- Drive Type
- SATA III / 3.5" HDD (7200 rpm)
- Input Power
- 12 VDC at 2 A
- Operating Shock
- 40 G / 2.0 ms
- Power Draw Idle
- 5.5 W
- Power Draw Active
- 7.7 W
- Encryption Support
- No
- Power Draw Standby
- 1.0 W
- Read Speed Maximum
- 285 MB/s
- Storage Conditions
- -40 to 158°F / -40 to 70°C
- Write Speed Maximum
- 285 MB/s
- Operating Conditions
- 32 to 97°F / 0 to 65°C
- Total Installed Storage
- 20 TB
- Endurance (Total Bytes Written)
- 550 TB
- Mean Time Between Failures (Mtbf)
- 2.5 Million Hours
Where to buy
Live prices from retailers. We earn a small commission when you click through - never affects ranking.
- B&H Photonew● In stock$799Buy
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