Western Digital Purple Pro 22TB 3.5" Surveillance Internal Hard Drive

Overview

The Western Digital WD221PURP is a 3.5-inch internal hard drive designed specifically for surveillance systems, offering a massive 22TB of storage capacity. It supports continuous video recording and analytics with a SATA interface capable of transfer speeds up to 265MB per second, ensuring high-resolution footage is saved and accessed efficiently. This drive is built to handle demanding workloads and multiple camera streams, making it a solid choice for professional security setups.

Key features

• Large 22TB capacity provides ample space for extensive video archives and data storage.
• SATA interface with transfer rates up to 265MB/s enables fast writing and retrieval of high-resolution video streams.
• 512MB cache smooths out bursts of data activity, improving overall performance during heavy use.
• OptiNAND technology enhances storage efficiency and balances capacity with quick access to archived footage.
• Workload rating of up to 550TB per year supports continuous operation in demanding surveillance environments.
• Capable of managing up to 64 single-stream HD cameras simultaneously, ideal for multi-camera setups.
• Mean time between failures (MTBF) of up to 2.5 million hours ensures long-term reliability and minimal downtime.
• Tarnish-resistant components increase durability in challenging conditions, maintaining performance over time.
• Designed to fit seamlessly into network video recorders, AI-enabled recorders, and video analytics servers.

Key specs

• Capacity: 22TB
• Form factor: 3.5-inch
• Interface: SATA
• Maximum transfer rate: 265MB/s
• Cache size: 512MB
• Workload rating: 550TB per year
• Camera support: up to 64 single-stream HD cameras
• MTBF: up to 2.5 million hours

Connectivity and compatibility

This hard drive uses a standard SATA interface, making it compatible with most surveillance systems and network video recorders that support 3.5-inch SATA drives. Its design supports integration into both existing and new surveillance infrastructures, including AI-enabled recorders and analytics servers that require high-capacity, reliable storage.

Performance and reliability

Engineered for continuous operation, the WD221PURP maintains consistent performance even under heavy workloads. Its high workload rating and large cache help manage multiple video streams without lag or data loss. The drive’s tarnish-resistant components and long MTBF rating contribute to dependable operation in temperature-controlled server rooms or edge devices, reducing the risk of failure and downtime.

Ideal uses and environments

This drive is well suited for security professionals, small business owners, and data scientists who depend on video footage for evidence or analysis. It fits well in multi-bay NVRs, AI training servers, and large enterprise arrays where storage capacity and endurance are critical. Whether expanding an existing system or building a new one, this drive offers the capacity and reliability needed for demanding surveillance applications.