Not exactly possible. SATA2 drives, though apparently back compatible to SATA1 (1.5Gb/s), don’t always automatically default back on this m/board.
Look up your HDD manufacturers site and find the jumper setting to revert it to SATA1. My drive has a drawing on the drive cover 🙂
Ensure Onboard SATA is *enabled* in the BIOS.
The MB will then recognise the SATA drive. I just could not make this drive bootable. So currently booting from the IDE drive.