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Silver 3.5 inch internal hard drive with circuit board visible

Seagate

Seagate ST4000VN006 IronWolf 4 TB 5400 RPM 256 MB cache SATA 6.0 Gb/s 3.5" internal hard drive

SKU CH-2ABH-148XX MPN ST4000VN006

A 4 TB 3.5-inch CMR hard drive with 5400 RPM, 256 MB cache and SATA 6.0 Gb/s built for 24×7 NAS workloads

  • InterfaceSATA 6.0Gb/s
  • Capacity4TB
  • NAND Flash Memory TypeHard Drive
  • Recording TechnologyCMR
  • RPM5400 RPM
  • Cache256MB

Options 4TB

  • Optimised for 24/7 NAS workloads with AgileArray firmware
  • 4 TB capacity stores large media libraries and backups
  • 256 MB cache accelerates multi-user RAID performance
  • CMR recording technology ensures consistent write speeds
  • 5-inch SATA 6.0 Gb/s interface fits standard NAS bays

NAS-ready capacity

This 4 TB 3.5-inch drive uses a SATA 6.0 Gb/s interface and spins at 5400 RPM with a 256 MB cache. It is built for multi-bay NAS enclosures that run 24/7 and need consistent throughput for shared files, backups and media libraries. The CMR recording technology and AgileArray firmware keep RAID arrays stable under continuous workloads.

Upgrade from desktop drives

Standard desktop drives lack the vibration tolerance and error-recovery tuning required for always-on arrays. This model adds dual-plane balancing and time-limited error recovery so rebuilds finish faster and the array stays online. The jump is worth it when a NAS serves multiple users or stores irreplaceable data that cannot tolerate a single drive failure.

Fits a 3.5-inch bay

The drive measures 146.99 mm long, 101.85 mm wide and 20.20 mm high, matching the standard 3.5-inch form factor. It draws power and data through the same SATA connectors used by any modern NAS chassis or server backplane. No extra cooling brackets or proprietary cables are required, leaving adjacent bays free for expansion.

Highlights

  • Optimised for 24/7 NAS workloads with AgileArray firmware
  • 4 TB capacity stores large media libraries and backups
  • 256 MB cache accelerates multi-user RAID performance
  • CMR recording technology ensures consistent write speeds
  • 5-inch SATA 6.0 Gb/s interface fits standard NAS bays

Specifications

BrandSeagate
SeriesIronWolf
ModelST4000VN006
Part NumberST4000VN006
InterfaceSATA 6.0Gb/s
Capacity4TB
NAND Flash Memory TypeHard Drive
Recording TechnologyCMR
RPM5400 RPM
Cache256MB
FeaturesOptimized for NAS with AgileArray enables Dual-Plane Balancing and Time-Limited Error Recovery to deliver best-in-class RAID performance in multi-bay systems.
Always On, Always Accessible IronWolf drives are designed for 24x7 usage, allowing users to access their data any time, anywhere.
All-CMR Portfolio All IronWolf drives utilize Conventional Magnetic Recording (CMR) technology for consistent, best-in-class NAS performance.
Up to 32TB Broad range of capacity options to deliver scalable and cost-efficient storage solutions.
Built Tough IronWolf drives are rated for 180TB/year workl
UsageFor NAS systems
Form Factor3.5"
Height (maximum)20.20mm
Width (maximum)101.85mm
Length (maximum)146.99mm
Shipping weight0.41 kg
Package size152 × 102 × 25 mm

Other versions of this model

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Questions about this item

Will the 3.5" form factor and 20.20mm height fit my NAS drive bay?

The drive measures 146.99mm long, 101.85mm wide and 20.20mm high, matching the standard 3.5" bay used in most multi-bay NAS enclosures.

What is the correct way to connect the SATA 6.0Gb/s interface so the drive is recognised?

Attach both the SATA data cable and the SATA power cable firmly; the step often missed is not seating the power connector fully, which leaves the drive without power.

How do I monitor the drive health to know when replacement is needed?

Use the IronWolf Health Management feature via your NAS software to track SMART attributes and workload rate, and plan replacement when the tool flags degradation.

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