I by no means have all the details on this but I just watched the recent DL.TV ( http://dl.tv ) episode 171 and they were showing this storage device.
Summary: It’s a hot swappable 4 drive USB Raid storage device. However, the unique thing is the drive size doesn’t matter! You can mix different sized HDD without the penalty of only getting the smallest sized drive issue.
I think this offers some very interesting options for external storage and data protection.
Product Demo from Data Robotics
http://www.drobo.com/products_demo.aspx
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