Does the configuration software run on a non-dell system? I think I read somewhere the standard megaraid software won't control the dell versions of their parts, and you have to use a dell utility...
The H810 is one of their newest controllers, and I haven't personally used one. unfortunately, Dell has had a history of flip/flopping on supporting third party drives and then not and then supporting them again. I haven't seen any discussions on this card yet but the 700 series did support third party drives. Ask your friend to put a pair of non-dell sourced drives on the card and see if it supports creating a mirror.