Were?
Here?
I don't believe this stuff.
There have been UEFI versions (and this ist UEFI, not BIOS) that haven't had an AHCI option, only the RAID option that is absurd at this point. You couldn't install Linux with it. Later versions corrected this for several models.
AHCI is the right mode. For Linux
and Windows.
But you have to disable Fast Boot mandatory for Dualboot Win/Lx. In the UEFI settings
and in Windows:
- Push the super button!
- Run cmd as administrator!
- Execute: "powercfg /h off"
- Reboot or shut down!
You must also disable Secure Boot to use unsigned software (nvidia, VBox GuestAdditions).