Weird. Kinda cool, but weird.I've got an answer directly from Kingston. These are custom made drives for Acer S7 laptops and are setup as two half drives in Raid 0. Only a system with SATA multiplier port support can read both halves, most don't have the support so they only see half size. I've been had by an ebay seller this time, there was no mention about this being a custom ssd.