I have an older Compaq 333Mhz Presario desktop. It has the original 8 GB HD. I have added a PCI card with onboard BIOS to attach to and to recognize two larger HDs. My two large HDs are partitioned using FDISK. When I go to Safe Mode, only the original HD which is connected to the motherboard and one of the two HDs connected to the PCI card are recognized. Why?