any computer gurus here?

Interesting....most literature says you can but it will fall back on slowest drive. Also it showed double my disk space at 240Gb, did that happen because it was striped? This guy had same question.

http://www.tomshardware.com/forum/248395-32-320gb-hard-drives-raid-320gb-space

There is a 80 page manual on this sata controller in addition to the 10 page startup guide, guess ill have to hit the books...my RAID knowledge was gleened from the back of a spray can.