If you could check which chipset your current RAID controller has, may be try to get one with the similar chipset
In theory, if you have the same chipset raid controller with the same firmware revision, it should work fine.
I used to have an intel controller, when i changed for another model raid controller with the same chipset, it worked fine for me.
Check in the Tested Hardware List
All the best,
This board had the First Generation ESRT (embedded server raid tech). there is a controller which has the Second Generation ESRT2.
But this is now this is a risk because it may not be compatible with the board and the old configuration may not be compatible with the new controller.