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Silver 3.5 inch internal hard drive with circuit board visible on underside

Seagate

Seagate ST18000NT001 IronWolf Pro 18TB 7200 RPM 256MB SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-F797-2ADTV MPN ST18000NT001

An 18 TB 3.5-inch CMR drive built for 24×7 NAS workloads with AgileArray, RV sensors and 256 MB cache

  • Total capacity18 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Recording methodCMR
  • Rotational speed7,200 RPM
  • Cache memory256 MB

Capacity 18TB

  • 18TB capacity for massive NAS storage
  • 7200 RPM and 256MB cache deliver fast data access
  • CMR technology ensures consistent 24×7 performance
  • AgileArray with RV sensors optimises RAID in multi-bay systems
  • 550TB yearly workload rating and 2.5M hours MTBF

Designed for multi-bay NAS

The Seagate IronWolf Pro ST18000NT001 is an 18TB 3.5-inch internal hard drive built for 24×7 operation in multi-bay network-attached storage systems. It uses conventional magnetic recording and a SATA 6.0Gb/s interface to deliver consistent performance for creative professionals and small-business servers that need high-capacity, always-accessible storage.

Capacity and workload headroom

The drive provides 18TB of CMR capacity with a 256MB cache and 7200 RPM spindle speed, rated for up to 550TB per year workload rate. It comfortably handles sustained multi-user file sharing, backup streams and media libraries, while the 2.5M-hour MTBF rating supports long-term deployment; workloads exceeding the annualised rate or applications needing SSD-class latency will hit limits.

Thermals, noise and power in normal use

Optimised with AgileArray dual-plane balancing and built-in rotational vibration sensors, the drive maintains stable operation in dense chassis without excessive vibration-induced noise. The 26.11mm z-height fits standard 3.5-inch bays, and the SATA interface keeps power draw predictable for NAS power supplies; acoustic output remains typical for 7200 RPM enterprise drives during continuous read-write cycles.

How it compares

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

Price $391.99
Pricier than about 90% of the 4,938 comparable items (median $107.99).
Total capacity 18 TB
Higher than about 93% of the 2,372 comparable items (median 2 TB).
Price per TB $21.78 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 nameST18000NT001
Total capacity18 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 weight0.66 kg
Package size146 × 102 × 25 mm

Other versions of this model

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Questions about this item

Will the ST18000NT001's SATA 6.0Gb/s interface work with my older NAS that only supports SATA 3.0Gb/s?

Yes, the SATA 6.0Gb/s interface is backward compatible with SATA 3.0Gb/s ports, though the drive will run at the slower 3.0Gb/s speed.

How can I verify the IronWolf Pro drive is healthy after installing it in my NAS?

Use IronWolf Health Management software to run SMART tests and monitor prevention, intervention, and recovery recommendations for peak system health.

Does the ST18000NT001 come with mounting screws or a SATA cable, or must I buy them separately?

Retail or OEM packing may vary; the drive itself is supplied without cables or screws, which must be sourced from your NAS chassis or purchased separately.

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