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Seagate 3.5 inch internal hard drive, bare silver aluminium casing

Seagate

Seagate ST4000NM0085 4TB 7200 RPM 128MB 4Kn SATA 3.5" internal hard drive

SKU CH-F1QQ-VA84R MPN ST4000NM0085

A 3.5-inch enterprise hard drive with 4 TB of CMR storage, 7200 RPM speed and 128 MB cache for 24×7 bulk-data workloads

  • Total capacity4 TB
  • Interface type4Kn SATA
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory128 MB

Capacity 4TB

  • Enterprise-grade CMR technology maximises storage density per bay
  • 7200 RPM spindle speed delivers consistent throughput for bulk-data workloads
  • 128 MB cache with Advanced Write Caching boosts nearline performance efficiency
  • Engineered for 24×7 operation at 550 TB/year workload rating
  • 4Kn SATA 6 Gb/s interface ensures broad compatibility with RAID and replicated storage systems

4TB Enterprise Hard Drive

The Seagate ST4000NM0085 is a 4TB 3.5 inch internal hard drive built for enterprise storage servers and arrays. It spins at 7200 RPM with a 128MB cache and uses a 4Kn SATA 6Gb/s interface. The drive employs conventional magnetic recording technology and is engineered for continuous 24x7 operation with a 550TB per year workload rating.

Suited for RAID and bulk data; not for desktop boot

This drive suits administrators deploying replicated or RAID multi-drive systems that need consistent performance in dense chassis. It supports advanced write caching algorithms for high nearline workload efficiency. Buyers wanting a desktop boot drive or a drive for intermittent consumer use should look elsewhere because this unit is optimised for sustained enterprise duty cycles.

Check 4Kn support and 3.5 inch bay clearance

Verify that your host bus adapter, RAID controller or motherboard supports 4Kn sector addressing before ordering. The drive requires a standard 3.5 inch drive bay with at least 26.10mm height, 101.85mm width and 147.00mm length clearance. Ensure your power supply provides a SATA power connector and that your backplane or cabling matches the SATA 6Gb/s interface.

How it compares

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

Price $134.99
Pricier than about 56% of the 4,938 comparable items (median $107.99).
Total capacity 4 TB
Higher than about 70% of the 2,372 comparable items (median 2 TB).
Price per TB $33.75 per TB
Cheaper than about 78% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Model nameST4000NM0085
Total capacity4 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Cache memory128 MB
Ports & slots
Interface type4Kn SATA
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.85 mm
Maximum length147 mm
Shipping weight0.91 kg
Package size254 × 203 × 152 mm

Other versions of this model

1 more in the same range

Questions about this item

Will this 3.5-inch SATA drive fit in my desktop case and connect to a standard motherboard port?

The drive uses the 3.5-inch form factor with a SATA 6Gb/s interface, matching standard desktop drive bays and motherboard connectors.

Can I add this 4Kn SATA drive to an existing RAID array that uses 512e drives?

Mixing 4Kn and 512e sector formats in the same array is not recommended; the controller must support 4Kn natively for this drive to work correctly.

How can I verify the drive is running at its rated 7200 RPM and 128MB cache after installation?

Check the reported RPM and cache size in BIOS or with a tool like CrystalDiskInfo; they should read 7200 RPM and 128MB respectively.

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