I have a Gigabyte motherboard (geforce 9400) and Optiarc 7203S.
It has been running using IDE-emulation, but now that I'm gonna try W7, I changed the SATA to AHCI, but it is like the 7203S is not there and cannot use it as bootdrive. I can press F12 during POST to get the Gigabyte boot selector, but there is only a + next to the harddrive and not the CD-rom, almost as it doesn't exist.
I have tried another SATA-port but no change.
Is this a hardware limitation from the Optiarc, the motherboard or just a bad combination ?