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The WD Purple Pro is a 10TB internal 3.5-inch hard drive built for always-on surveillance recorders. It spins at 7200 rpm with a 256MB cache and a 6Gb/s SATA interface, and WD rates it at 2 million hours MTBF. That makes it a heavier-duty drive than standard desktop HDDs and a step above the plain Purple line, which runs slower and carries lower endurance ratings. It suits NVR and DVR owners running many cameras who want long continuous writes and good random-read performance for playback.
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Lowest price we've seen: $299.00 on Nov 11 at Robert Electronics. Tracked across 4 stores since Nov 11.
Owners of surveillance systems generally rate the Purple Pro line as reliable for continuous recording, with the 7200 rpm speed helping playback and export. Complaints center on noise and heat compared with slower drives, and on the need to check recorder compatibility for large capacities.
The Western Digital Purple Pro Air WD101PURP is a 10TB internal hard disk drive (HDD) in the 3.5-inch form factor. It connects through a SATA 6Gb/s interface.
The drive spins at 7200 RPM and has a 256MB cache. It draws 9.0 W when reading or writing and 0.5 W in standby. Its rated mean time between failures is 2,000,000 hours.