I am presently putting together a SLI enabled computer for myself. I now realise how much the accelerating pace of technology has left me behind in the 5 or 6 years since I built my last one. I am a newcomer to the concept of RAID and have never used SATA drives before. Is it feasible to use my old UDMA drive for the OS and program files in combination with two SATAII drives in RAID 1 configuration for separate data storage or would everything have to go on the RAID array? I gather you have to create a RAID/SATA driver disk when installing Win XP on a drive which is part of a RAID set. The motherboard is an Asus P5N32-SLI SE Deluxe which supports 2xUDMA devices, 4xSATA devices and up to 8 drives of multi-RAID configuration. There also appear to be two SATA controllers, nForce SLI and Silicon Image 3132 included on the supplied support CD. Is there a distinct advantage to using either of these apart from the fact that you can only create a RAID 0, 1 or JBOD with the Silicon Image?