If the RAID is on the Motherboard I would lay odds that it's not true hardware RAID but more likely fakeraid.
Another test would be the price of the motherboard, Was the motherboard over $400.00 ? then it's fakeraid.
A decent RAID controller will Start around $300.00 and go up, so if the motherboard is that same price or less than a Hardware RAID controller, simple logic dictates that the board doesn't have a Hardware based RAID controller on it. so you can't configure RAID inthe BIOS then expect things to just work.. doesn't happen like that with FakeRAID
It looks like the RAID on that board is the Intel ICH10R
Look at the Ubuntu install on Fakeraid how to https://help.ubuntu.com/community/FakeRaidHowto
If you want True hardware RAID controller, then you need to invest in a RAID controller such as LSI, 3Ware, etc..
How-To Dual boot windows / Ubuntu on ICH10R with dmraid
Best of luck !!