[ubuntu] Convert software raid to hardware raid

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http://ubuntuforums.org – I have software RAID on Ubuntu 10.10 with currently disabled hardware RAID controller, server has 2*500GB in RAID 1 drives for OS and 3TB*4 in RAID 1 for storage. What do i want, create hardware raid at least for storage w/o loosing data, or best option to add two new 3TB drives and create hardware RAID 10. Can I have software RAID for OS and hardware raid for storage ? (Hardware)