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Silver 3.5-inch internal hard drive with label showing WD Red Pro 18TB

Western Digital

Western Digital WD181KFGX 18TB 7200 RPM 512MB CMR 3.5" internal hard drive

SKU CH-G3GA-RA72F MPN WD181KFGX

An 18 TB enterprise NAS drive with 7200 RPM, 512 MB cache and CMR recording for up to 24-bay systems

  • InterfaceSATA 6.0Gb/s
  • Capacity18TB
  • NAND Flash Memory TypeHard Drive
  • Recording TechnologyCMR
  • RPM7200 RPM
  • Cache512MB

Capacity 18TB

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  • 18TB capacity for large-scale NAS storage
  • 7200 RPM and 512MB cache deliver fast data access
  • CMR recording technology ensures consistent write performance
  • 3D Active Balance Plus reduces vibration in multi-bay enclosures
  • Rated for 300TB per year workload in 24-bay systems

18TB CMR NAS drive

The Western Digital WD181KFGX is an 18TB 3.5 inch internal hard drive built for multi-bay NAS enclosures. It uses CMR recording technology, spins at 7200 RPM and provides a 512MB cache over a SATA 6.0Gb/s interface. The drive belongs to the Red Pro series designed for continuous operation.

Suited for 24-bay RAID arrays

This drive supports NAS systems with up to 24 bays and a 300TB per year workload rate. NASware 3.0 technology and 3D Active Balance Plus enhance reliability in vibration-prone chassis. Builders needing more than 24 bays or a non-SATA interface should consider other solutions.

18TB capacity decision

The single specification that determines fit is the 18TB capacity. Verify that the NAS bay count, RAID level and total storage target align with this capacity before purchasing.

Helstu kostir

  • 18TB capacity for large-scale NAS storage
  • 7200 RPM and 512MB cache deliver fast data access
  • CMR recording technology ensures consistent write performance
  • 3D Active Balance Plus reduces vibration in multi-bay enclosures
  • Rated for 300TB per year workload in 24-bay systems

Tæknilýsing

BrandWD
SeriesRed Pro
ModelWD181KFGX
InterfaceSATA 6.0Gb/s
Capacity18TB
NAND Flash Memory TypeHard Drive
Recording TechnologyCMR
RPM7200 RPM
Cache512MB
Features3D Active Balance Plus
Our enhanced dual-plane balance control technology significantly improves the overall drive performance and reliability. Hard drives that are not properly balanced may cause excessive vibration and noise in a multi-drive system, reduce the hard drive life span, and degrade the performance over time.
Error Recovery Prevention
Built specifically for RAID and NAS environments, WD Red Pro drives come equipped with error recovery controls as part of NASware 3.0 technology to help reduce drive fallout in RAID applications.
Extended Drive Testing
A NAS environment tha
UsageEnterprise NAS Hard Drives
Form Factor3.5"
Height (maximum)26.10mm
Width (maximum)101.60mm
Length (maximum)147.00mm
Sendingarþyngd0.82 kg
Stærð sendingar216 × 152 × 76 mm

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How much power does the 18TB 7200 RPM drive draw during continuous all-day operation?

The drive is rated for a 300TB yearly workload and uses 3D Active Balance Plus to reduce vibration, but exact power-draw figures are not supplied.

What host interface and bay size must my NAS already provide for this 3.5" SATA 6.0Gb/s drive?

A free 3.5-inch bay with a SATA 6.0Gb/s port and standard SATA power connector is required.

Will this 18TB CMR drive work reliably in a four-bay NAS that currently runs older 4TB drives?

Yes, the drive supports up to 24 bays and NASware 3.0 optimises it for mixed-capacity RAID arrays.

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