WESTERN DIGITAL Hard Drive - Wd Purple Pro WD221PURP - 22TB - SATA 6Gb/s - 3.5in - 7200rpm - 512MB Cache

The Western Digital 22 TB 3.5" Serial ATA III WD221PURP internal hard drive (WD Purple Pro) is purpose-built storage for AI-enabled recorders, video analytics servers and deep learning systems. With OptiNAND technology and a 22 TB capacity, the drive delivers enterprise-class storage tailored for continuous video capture, analysis and long-term retention in surveillance and smart video deployments.

Advantages

WD Purple Pro combines OptiNAND and AllFrame AI technologies to support intensive video workloads with reduced frame drops. The drive is rated for up to 550 TB/year workload and operates at 7200 RPM with a 512 MB buffer, enabling high throughput for multi-stream video and analytics. It is engineered for reliability with an MTBF of up to 2.5 million hours, tarnish-resistant components, full multi-bay support and a 5-year limited warranty. Western Digital Device Analytics (WDDA) adds proactive drive health management when used with compatible recorders and VMS.

Suitable for

• AI-enabled NVRs and recorders handling multiple video streams
• Video analytics servers and deep learning systems
• Large-scale surveillance installations requiring continuous 24/7 recording
• Systems needing high-capacity SATA 3.5" HDDs for long-term video storage

Key specifications

• Model: WD221PURP (WD Purple Pro)
• Capacity: 22 TB (22000 GB)
• Form factor: 3.5"
• Interface: Serial ATA III (SATA)
• Spindle speed: 7200 RPM
• Cache: 512 MB
• Workload rating: up to 550 TB/year
• AI streams supported: up to 32 (AllFrame AI)
• Concurrent HD camera streams: up to 64 single-stream cameras
• MTBF: up to 2,500,000 hours
• Weight: 0.67 kg
• Warranty: 5-year limited warranty

How to use

Install the WD221PURP into a compatible 3.5" drive bay and connect it to a Serial ATA III interface on the host recorder, server or storage enclosure. Configure the drive within your recorder or video management system according to the vendor’s instructions, and enable any supported WDDA features for drive health monitoring. For multi-bay systems, ensure proper bay mapping and firmware compatibility with your NVR or analytics appliance.

Recommendations

Use this WD Purple Pro 22 TB drive in systems designed for 24/7 video capture and analytics. Allocate drives according to the recorder’s recommended RAID or storage architecture, perform regular firmware updates and monitor drive health via compatible WDDA-enabled recorders or VMS to maintain reliable long-term operation.