Hi ch1alex reading about it would seem changing SATA to AHCI after the OS has been installed can cause problems.
I have found a guide on another forum that seems to show it may be possible to enable AHCI post OS, I can't be 100% sure, but going on past experience with Vaio BIOS I suspect you may not have the option to enable AHCI in your BIOS, so you may want to check that first.
At the end of the day it would down to you if you want to follow the advice in the linked guide.
