This is a general problem
When you installed (not if in your case I presume) do you remember having to press F6?
This is because all consumer mobos have fake (or software) RAID and rely on Windows drivers to function
The kernel in Daryna has support for that but it does not work well
I don't really have a solution, and well working simple to configure RAID is on the wishlist http://linuxmafia.com/faq/Hardware/sata.html
Perhaps simpler as non boot diskviewtopic.php?f=46&t=9917&hilit=RAID
Search in the forum for raid - there are some interesting topics