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Silver 3.5-inch internal hard drive with black label, rectangular metal casing and exposed circuit board underside

Western Digital

Western Digital WD221KFGX 22TB 7200 RPM 512MB cache 3.5" internal hard drive

SKU CH-X0FE-FDPFB MPN WD221KFGX

22 TB CMR hard drive built for 24-bay enterprise NAS with 300 TB/year workload rating and 3D Active Balance Plus technology

  • InterfaceSATA 6.0Gb/s
  • Capacity22TB
  • Recording TechnologyCMR
  • RPM7200 RPM
  • Cache512MB
  • Features3D Active Balance Plus Our enhanced dual-plane balance contr

Capacity 22TB

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  • 22 TB capacity for massive NAS storage
  • 7200 RPM and 512 MB cache for fast data access
  • CMR technology ensures consistent write performance
  • 3D Active Balance Plus reduces vibration in multi-bay systems
  • Built for 24-bay NAS with 300 TB yearly workload rating

22 TB CMR drive for multi-bay NAS

The WD Red Pro WD221KFGX is a 22 TB, 3.5-inch internal hard drive built for 24/7 operation in enterprise NAS systems. It uses Conventional Magnetic Recording and spins at 7200 RPM with a 512 MB cache. The drive is rated for workloads up to 300 TB per year and carries a five-year limited warranty.

Fits 3.5-inch bays with SATA 6.0 Gb/s

The drive measures 147.00 mm long, 101.60 mm wide and 26.10 mm high, matching standard 3.5-inch drive bays in NAS enclosures and desktop chassis. It connects through a SATA 6.0 Gb/s interface and is validated for systems with up to 24 bays. Multi-axis rotational vibration sensors help maintain data integrity when many drives operate side by side.

3D Active Balance Plus reduces vibration

Enhanced dual-plane balance control lowers vibration that can degrade performance and reliability in dense NAS configurations. NASware 3.0 firmware adds error recovery controls tuned for RAID environments. The drive is tested for extended reliable operation under continuous enterprise workloads.

Helstu kostir

  • 22 TB capacity for massive NAS storage
  • 7200 RPM and 512 MB cache for fast data access
  • CMR technology ensures consistent write performance
  • 3D Active Balance Plus reduces vibration in multi-bay systems
  • Built for 24-bay NAS with 300 TB yearly workload rating

Tæknilýsing

BrandWD
SeriesRed Pro
ModelWD221KFGX
InterfaceSATA 6.0Gb/s
Capacity22TB
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
Sendingarþyngd0.91 kg
Stærð sendingar196 × 152 × 51 mm

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What is the annual workload limit for the WD221KFGX under sustained 24/7 use?

The drive is rated for up to 300TB per year workload rate, suitable for enterprise NAS environments with heavy write demands.

How does the 7200 RPM spindle speed affect heat and noise during all-day operation?

3D Active Balance Plus dual-plane balancing and multi-axis RV sensors reduce vibration, helping maintain stable temperatures and quieter performance in multi-bay NAS enclosures.

Which NAS enclosure specifications must I already have to install this 3.5-inch SATA drive?

Your NAS must provide 3.5-inch bays with SATA 6.0Gb/s ports, support drives up to 26.10mm height, 101.60mm width and 147.00mm length, and handle up to 24 bays for full compatibility.

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