If the RAID 1 does not have a file system it will not show within the Windows Explorer like view. Under Analyze | Open Command Shell |Diskpart | list disks, does it show the internal container making up the RAID? If not what is the make and model of the RAID controller? Is the firmware up to date, and have you used the, 'Load a driver,' menu option to load the Vista/2k8 drivers for the 8.0x/8.5 recovery environment to see the RAID controller; even though it is a 2k3 image you are trying to restore you might want to see if the VISTA/2k8 driver will work in the SRD to properly detect the controller.