Seagate
Seagate IronWolf Pro 16TB
16 TB · 3.5" · 7,200 RPM
7.9
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WD Red Pro 16TB
A 7200 RPM CMR NAS drive with a 512MB cache, a 550TB per year rating and a five-year warranty.
- 16 TB
- 3.5"
- 7,200 RPM
- CMR
- NAS
PCPR score
7.9
Good
Best price we’ve seen
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R1
The short version
The WD Red Pro 16TB is Western Digital's higher-end NAS drive, using CMR recording at 7200 RPM with a 512MB cache, OptiNAND and transfers up to 259 MB/s. Western Digital rates it for 550TB per year with a five-year warranty. It suits busy multi-bay NAS units. Tom's Hardware's guide names the Red Pro line a strong alternative to the IronWolf Pro, particularly for small-file work, though it lacks Seagate's bundled recovery plan.
Pros
- 512MB cache and OptiNAND
- Rated for 550TB per year
- Five-year warranty
- Up to 259 MB/s transfer rate
Cons
- No bundled data recovery plan, unlike the IronWolf Pro
- Tom's Hardware saw the IronWolf Pro reach slightly higher sustained write speeds
Best for
- Multi-bay NAS units
- Workloads with many small files
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Full specifications
Core
- Capacity
- 16 TB
- Form factor
- 3.5"
- Interface
- SATA III
Performance
- Spindle speed
- 7,200 RPM
- Cache
- 512 MB
- Recording
- CMR
Features
- Intended use
- NAS
- Warranty
- 5 years
Compatibility notes
- 3.5-inch SATA at 6 Gb/s; needs a 3.5-inch bay or NAS sled.
- CMR recording, so it is suited to RAID arrays.
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Where to buy
- Buy from the maker
Western Digital official page
Direct link
- Check price on Amazon
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AV1
Video reviews
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AV2
What reviewers and owners say
Tom's Hardware
PositiveNames the Red Pro line its alternative NAS pick, crediting its large cache and strong small-file results, though it sees the IronWolf Pro's recovery service as an advantage.
Review
Read the sourcer/DataHoarder · u/LupusOnFire
CriticalA buyer of three Red Pro 16TB drives found one consistently about 15% slower across benchmarks despite clean SMART data, identical firmware, and bay swapping, with no resolution from Amazon.
2026-09-12
Read the source
Summaries are written in our words. Follow the links for each source’s own review.
R9
Common questions
How does it compare with the IronWolf Pro?
Tom's Hardware sees them as closely matched. The Red Pro has more cache and better small-file results, while the IronWolf Pro adds a three-year recovery service.
Is the WD Red Pro CMR?
Yes. Western Digital's specification table for the WD161KFGX lists CMR recording, a 7200 RPM speed and a 512MB cache.
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