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Silver 3.5 inch enterprise hard drive with Seagate Exos X18 label

Seagate

Seagate Exos X18 18TB 7200 RPM SATA 6.0Gb/s 256MB 3.5" internal hard drive

SKU CH-7Y18-RRGY0

Enterprise-grade 18TB SATA drive spins at 7200 RPM with 256MB cache and a 2.5M-hour MTBF rating for continuous data-centre workloads

  • Total capacity18 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Flash memory typeHard Drive
  • Rotational speed7,200 RPM
  • Cache memory256 MB
  • 18TB capacity in a standard 3.5-inch form factor
  • 256MB cache for enhanced caching performance
  • 7200 RPM spindle speed for reliable data access
  • 5M MTBF rating for enterprise reliability
  • Helium side-sealing weld technology for robustness and leak protection

High-capacity enterprise hard drive

This 18TB 3.5-inch drive spins at 7200 RPM and connects through a SATA 6.0Gb/s interface with 256MB cache. It is built for cloud data centres, NAS deployments and large-scale RAID arrays where sustained throughput and density matter.

Suited for bulk storage workloads.

The drive targets hyperscale archives, backup targets and distributed file systems such as Hadoop and Ceph. It is not for workloads that demand sub-millisecond access times or all-flash performance.

18TB capacity in a 3.5-inch form factor

The single specification that decides fit is the 18TB capacity delivered in a standard 3.5-inch chassis. If the storage plan calls for less capacity or a 2.5-inch bay, a different drive 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 $444.99
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 $24.72 per TB
Cheaper than about 89% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineExos X18
Total capacity18 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Flash memory typeHard Drive
Cache memory256 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)

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