Seagate

Seagate 20TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD (CMR) Review

Reviews
10
Score
91/100
From
$139
Released
January 2021

We've aggregated 10 high-signal reviews and 2 live retailer prices below.

Seagate 20TB IronWolf Pro 7200 rpm SATA III 3.5" Internal NAS HDD (CMR)
Available
Our take
Worth buyingPreliminary

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.

Best for: Creative professionals and small businesses needing maximum, high-performance storage capacity in a multi-bay NAS system.
What's great
  • 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
Watch outs
  • Premium price point compared to smaller drives
  • Runs hotter and louder than 5400 rpm alternatives
  • Power consumption is higher than lower-capacity models

Synthesized by Geared editors from early expert reviews.

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Overview

About this product

The Seagate 20TB IronWolf Pro is an internal NAS HDD designed for multi-bay, multi-user RAID and NAS environments. It features a SATA III 6 Gb/s interface, a rotational speed of 7200 rpm, and a 256MB cache, offering ample storage capacity with data transfer speeds up to 285 MB/s. This drive is built for 24/7 operation and boasts a 2.5 million hours MTBF.

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
Live prices

Where to buy

Live prices from retailers. We earn a small commission when you click through - never affects ranking.

  • Adorama
    new● In stockBest price
    $139
    Buy
  • B&H Photo
    new● In stock
    $799
    Buy