Recording surveillance footage on SSDs isn't really a good idea. Storage on spinning metal platters is orders of magnitude less expensive, and 24/7 recording means that drives take a lot of wear and tear. The advantages that SSDs have in terms of lower seek times and higher sequential throughput are essentially wasted when recording video in real time, too. In surveillance, the name of the game is raw capacity, and Western Digital's new Purple 10 TB hard drive purports to offer a 25% increase in capacity compared to the company's previous largest surveillance drive. WD says the Purple 10 TB is built for "always-on, high-definition security systems" and can deal with "up to 64 HD cameras."
Like 10 TB drives from competing manufacturers, WD's new Purple is a helium-filled unit. The company didn't say if the Purple 10 TB uses conventional perpendicular recording or the slower-but-denser shingled recording technology found in many large-capacity drives. We expect peak sequential throughput in the vicinity of the 175 MB/s of the 5 TB, 6 TB, and 8 TB models. There's no word on seek times for any of these drives, though.
Western Digital says the Purple drives are designed for 24/7 operation in multi-bay systems, can handle workloads of up to 180 TB per year, and sport tarnish-resistant components. The 10 TB drives are available right now for $400, backed by a three-year warranty.
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