Trying to connect a WD raptor to SATA port 1 and a liteon LH-20A1L to SATA port 2 on my P4P800-E. The WD raptor was working fine as the boot HDD connected to SATA port 1 when i connected the LH-20A1L to SATA port 2 ,,the bios could no longer see the WD raptor connected to SATA port 1. i disabled to raid config in bios still no luck. Once the liteon was disconnected from SATA 2 it took severial reboots to get things working again. The liteon has no jummpers avaiable.