Any way to force AHCI mode on ICH8?

Ivan Voras ivoras at
Thu Sep 9 11:04:47 UTC 2010

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.
> 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:


to /boot/loader.conf ?

More information about the freebsd-questions mailing list