Any way to force AHCI mode on ICH8?

[Ivan Voras]

On 09/09/10 02:10, Morgan Wesström wrote:
> I run FreeBSD 8.1 on an old Asus P5B-VM motherboard with ICH8. Its AMI
> BIOS lacks an option to enable AHCI mode. Intel's datasheet for the ICH8
> family specifies that this feature exists on the ICH8, and the option is
> available in the BIOS for the identical (apart from form factor) P5B
> motherboard.
>
> http://www.intel.com/Assets/PDF/datasheet/313056.pdf
>
> I've contacted Asus support for an updated BIOS but I don't have much
> hope I will ever see one. Would it be possible to patch the FreeBSD
> kernel to enable AHCI mode somehow during boot?

You mean except adding:

ahci_load="YES"

to /boot/loader.conf ?