To install a SATA hard drive on the SN85G4, a floppy drive( or USB floppy drive) and floppy disk with the correct RAID driver are essential.
Before you start you need to do the following (This procedure will need to be done on other system):
Go into the BIOS setting to enable; Drive A, Onboard FDC Controller and SiI3512A SATA Raid ROM.