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Silver 3.5-inch internal hard drive with label showing Seagate IronWolf Pro 20TB

Seagate

Seagate IronWolf Pro 20TB 7200 RPM 256MB CMR SATA 6.0Gb/s 3.5" NE-ST20000NE000 internal hard drive

SKU CH-DE8B-PFNJQ MPN NE-ST20000NE000

A 20 TB, 7200 RPM CMR drive with 256 MB cache built for 24-bay NAS and 300 TB yearly workloads

  • Total capacity20 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Recording methodCMR
  • Rotational speed7,200 RPM
  • Cache memory256 MB

Capacity 20TB

  • 20 TB capacity stores massive datasets
  • 7200 RPM with 256 MB cache speeds multi-user workloads
  • CMR recording technology ensures consistent write performance
  • AgileArray firmware plus RV sensors optimise RAID reliability up to 24 bays
  • 300 TB yearly workload rating supports always-on enterprise NAS

Capacity and interface

The Seagate IronWolf Pro is a 20TB 3.5-inch internal hard drive that uses the SATA 6.0Gb/s interface. It spins at 7200 RPM and provides a 256MB cache with CMR recording technology. The drive is built for always-on operation in multi-bay NAS enclosures.

Who it suits and who it does not

This drive suits users who need 20TB of storage in a single bay and whose NAS supports SATA drives with AgileArray firmware. It is not for systems that only accept 2.5-inch drives or for workloads that exceed the 300TB per year rating. Buyers needing more than 24 bays per enclosure should also look elsewhere.

Deciding specification

The SATA 6.0Gb/s interface is the single specification that decides compatibility. The drive fits a standard 3.5-inch bay with maximum dimensions of 146.99mm length, 101.85mm width and 26.11mm height. Verify that the NAS controller and backplane support SATA before purchase.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $436.99
Pricier than about 90% of the 4,938 comparable items (median $107.99).
Total capacity 20 TB
Higher than about 94% of the 2,372 comparable items (median 2 TB).
Price per TB $21.85 per TB
Cheaper than about 91% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineIronWolf Pro
Model nameNE-ST20000NE000
Total capacity20 TB
Recommended useEnterprise NAS Hard Drives
Performance
Rotational speed7,200 RPM
Storage
Recording methodCMR
Cache memory256 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.11 mm
Maximum width101.85 mm
Maximum length146.99 mm
Shipping weight1.13 kg
Package size196 × 152 × 51 mm

Other versions of this model

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Questions about this item

What does the SATA 6.0Gb/s interface limit in practice?

The SATA 6.0Gb/s link sets the maximum data rate for the drive, capping sequential transfer speeds at the interface ceiling.

What physical clearance does the 3.5" 26.11mm high drive require?

The drive measures 146.99mm long, 101.85mm wide and 26.11mm high, so the bay must accommodate those maximum dimensions.

How is the drive installed in a NAS and what step is often missed?

Mount the drive in a 3.5" bay using four screws, connect SATA data and power cables, then enable the IronWolf Health Management feature in the NAS OS for monitoring.

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