Gigabyte ga-x58a-ud3r RAID 0 problem

Let me see if I understand this. You have a couple mis-matched different speed, SATA drives plugged into the Marvell (GSATA3) ports; you're enablign the Intel ICH controller's XHD featue, and you're not getting the RAID BIOS entry to build the drive array? Have I quite got it? Is there anything else?

nope thats it. Any ideas to fix it?

EEKK!

First of all - you really want 'matched' drives to RAID - while it can sometimes be done, I've never heard of anyone getting a long-term, stable RAID of any sort with totally differing drive technologies...

Second - the XHD at the top of the BIOS page is for the Intel ICH controller! If your drives are plugged into the Marvell SATA3 ports, that entry has nothing to do with them!

Third - the ICH is faster, better integrated into the architecture, and more stable than the Marvell SATA3's, mostly as a benefit of a half-decade of development... Best thing is to disable the Marvell controller until, say, 2012 or 2013!

Put your drives (if you insist - don't complain to me if you lose data!) on SATA2_0 and SATA2_1; enable XHD; save and exit; when your controller 'sees' the pair of drives and RAID set, on the next boot, it should 'offer you' the <CTRL+I> option...