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Silver 3.5 inch internal hard drive with SATA connectors and green label

Western Digital

Western Digital WD221PURP Purple Pro 22TB 7200 RPM 512MB SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-KE5V-SQHDE MPN WD221PURP

22 TB SATA drive built for 24/7 AI video surveillance with 7200 RPM speed and 512 MB cache

  • InterfaceSATA 6.0Gb/s
  • Capacity22TB
  • Recording TechnologyCMR
  • RPM7200 RPM
  • Cache512MB
  • FeaturesThe WD Purple Pro HDD, with OptiNAND technology in 22TB, del

Options 22TB

  • 22TB capacity stores weeks of high-resolution footage from 64 cameras
  • 7200 RPM and 512MB cache sustain smooth multi-stream recording
  • OptiNAND technology boosts areal density for reliable 22TB in a 3.5" drive
  • AllFrame AI reduces frame loss during continuous AI-enabled surveillance workloads
  • 550TB/year workload rating and 2.5M-hour MTBF built for 24/7 operation

Purpose-built surveillance storage

The WD Purple Pro WD221PURP is a 22TB 3.5-inch internal hard drive designed for advanced, AI-enabled smart video recorders, appliances and servers that operate continuously. Its CMR recording technology and OptiNAND architecture support heavy, always-on workloads in professional surveillance environments.

550TB yearly workload rating

This single specification defines whether the drive matches the installation: it is rated for up to 550TB of data written per year, far above desktop-class drives, and is optimised to handle up to 64 single-stream HD cameras plus multi-stream smart cameras without frame loss.

24/7 thermal and acoustic profile

Engineered for non-stop operation with an MTBF of up to 2.5 million hours, the 7200 RPM spindle and AllFrame AI streaming technology maintain consistent throughput while managing heat and vibration in multi-drive chassis. Power draw follows standard SATA 6.0Gb/s limits for the form factor.

Puntos fuertes

  • 22TB capacity stores weeks of high-resolution footage from 64 cameras
  • 7200 RPM and 512MB cache sustain smooth multi-stream recording
  • OptiNAND technology boosts areal density for reliable 22TB in a 3.5" drive
  • AllFrame AI reduces frame loss during continuous AI-enabled surveillance workloads
  • 550TB/year workload rating and 2.5M-hour MTBF built for 24/7 operation

Especificaciones

BrandWD
SeriesPurple Pro
ModelWD221PURP
InterfaceSATA 6.0Gb/s
Capacity22TB
Recording TechnologyCMR
RPM7200 RPM
Cache512MB
FeaturesThe WD Purple Pro HDD, with OptiNAND technology in 22TB, delivers big capacity in a drive engineered for advanced, AI-enabled, always-on smart video recorders, appliances, and servers.
Western Digital's exclusive AllFrame AI technology improves ATA streaming to help reduce frame loss and improve overall video playback.
WD Purple Pro drives are optimized to handle up to 64 single-stream HD cameras as well as many of the latest smart cameras that transmit multiple streams.
With a workload rating up to 550TB/year, these drives are built to keep up with heavy video data capture and analy
UsageFor Video Surveillance
Form Factor3.5"
Height (maximum)26.10mm
Width (maximum)101.60mm
Length (maximum)147.00mm
Peso de envío0.66 kg
Dimensiones del paquete142 × 102 × 25 mm

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Preguntas sobre este artículo

How much video data can the 22TB capacity actually store in a 24/7 surveillance system?

The 22TB capacity supports a workload rating up to 550TB per year, allowing continuous capture and analysis from multiple high-resolution camera streams.

What does the SATA 6.0Gb/s interface limit in a real recorder or server?

The SATA 6.0Gb/s interface caps the maximum theoretical transfer rate at 6.0Gb/s, which is the standard ceiling for mechanical drives in surveillance appliances.

Will the 3.5" form factor with 26.10mm height fit my NVR drive bay?

The drive measures 147.00mm long, 101.60mm wide and 26.10mm high, matching the standard 3.5" internal bay dimensions used in most NVRs and servers.

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