To be perfectly honest, I had never heard of Sans Digital before. I guess I just haven't been in the market for enterprise storage solutions, other than the stuff offered by our server manufacturers. But it seems recently SD has expanded into the home marketplace, in part thanks to a North American distribution agreement with Synology, maker of various consumer grade network storage/server products. They have also been in the news lately about incorporating Silicon Image (SIL) raid hardware in many of their new products.
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Review: OCIA