BIOS RAID not recognized

I just moved to ubuntu 8.04 on my office PC and laptop, however when I tried to install Ubuntu 8.04 64-bit on my Dell Dimension XPS 710 which is bundled with two 320GB SATA Hard Drives tied together as a RAID ARRAY on the BIOS, I don't get the RAID volume, just the two hard drives separately, I really like to move from SUSE to ubuntu but this won't work for me. Anyone could help me finding a workaround to this ugly situation.