Western Digital WD Purple Pro WD221PURP is a 22TB hard drive for smart video surveillance and video analytics storage. Its 3.5-inch form factor and SATA interface are specified for integration into a compatible recording system.
The drive combines 512MB cache with CMR recording and a 7200 RPM spindle speed. These confirmed specifications define the drive’s storage format and operating characteristics for video focused systems.
WD lists AllFrame AI, OptiNAND and WDDA among its technologies. The manufacturer states support for up to 64 single-stream cameras, while WDDA can monitor drive health when connected to a compatible recorder or system.
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