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Silver 3.5 inch internal hard drive with green label

Seagate

Seagate IronWolf Pro 18TB 7200 RPM 256MB CMR SATA 3.5" internal hard drive ST18000NE000

SKU CH-TCH7-92SD4 MPN ST18000NE000

High-capacity 18TB CMR drive spins at 7200 RPM with 256MB cache for 24×7 NAS workloads up to 300TB per year

  • 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

  • CMR technology ensures consistent 24×7 performance for 18TB capacity
  • 7200 RPM spindle speed with 256MB cache reduces average latency to 4.16ms
  • AgileArray dual-plane balancing and RV sensors optimise RAID performance in multi-bay NAS
  • IronWolf Health Management provides prevention, intervention and recovery recommendations for system health
  • Rescue Data Recovery Services included for three years with 90% in-house recovery success rate

IronWolf Pro 18TB NAS Drive

The Seagate IronWolf Pro ST18000NE000 is an 18TB 3.5-inch internal hard drive built for multi-bay NAS enclosures. It runs at 7200 RPM with a 256MB cache and uses CMR technology on a SATA 6.0Gb/s interface. AgileArray firmware adds dual-plane balancing, rotational vibration sensors and time-limited error recovery for consistent 24×7 operation.

Suits RAID Arrays, Not Single Desktop Use

This drive targets administrators running RAID arrays in 24×7 NAS systems who need the 300TB-per-year workload rating and IronWolf Health Management monitoring. It is not intended for builders who want a basic desktop storage drive without NAS-specific vibration tolerance or the included three-year Rescue Data Recovery service.

18TB CMR Capacity Decides Fit

The single specification that determines suitability is the 18TB CMR capacity combined with the 7200 RPM spindle speed. If the storage pool requires this exact raw capacity and conventional magnetic recording for predictable RAID rebuild times, the drive matches; otherwise a different capacity or recording technology is required.

How it compares

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

Price $314.99
Pricier than about 83% 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 $17.50 per TB
Cheaper than about 94% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineIronWolf Pro
Model nameST18000NE000
Total capacity18 TB
Recommended useEnterprise NAS Hard Drives
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
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 weight0.78 kg
Package size224 × 155 × 76 mm

Other versions of this model

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Questions about this item

How does the 300TB per year workload rating affect the drive's long-term replacement cycle?

The 300TB per year workload rating indicates the drive is built for heavy 24×7 NAS use; staying within this limit helps achieve the 2.5 million hour MTBF and reduces early replacement needs.

What sustained performance limit appears first when the 7200 RPM drive runs continuous multi-bay RAID workloads?

Rotational vibration in multi-bay enclosures is the primary limit; built-in RV sensors and AgileArray dual-plane balancing work together to maintain consistent throughput under sustained RAID traffic.

How much heat and noise does the 3.5-inch 7200 RPM mechanism produce during all-day operation?

Advanced power management in AgileArray optimises energy use across idle and active states, while dual-plane balancing reduces mechanical vibration that contributes to noise and heat in multi-drive NAS chassis.

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