On Wed, Nov 30, 2011 at 12:11:45PM +0000, Chris Webb wrote:
> Possible a stupid question, but noting the new AHCI support in qemu, how do
> I specify an AHCI drive to attach to a qemu VM?
>
> I can create IDE, SCSI and virtio drives with
>
> -drive if=ide,bus=M,unit=N,...
> -drive if=scsi,bus=M,unit=N,...
> -drive if=virtio,index=N,...
>
> but when I attempted to test AHCI, a variety of plausible things I tried
> like
>
> -drive if=ahci,...
> -drive if=ide-ahci,...
> -drive if=ide,bus=ahci.0,...
>
> all failed. There's no mention of AHCI in qemu-options.hx or qemu-doc.texi,
> nor anything in the git commit log history about using this new drive type.
Using -drive with an if=XXX which is anything other than 'none' is the
deprecated / legacy syntax. The way libvirt does AHCI is to use the more
verbose/modern syntax:
-device ahci,id=ahci0
-drive
if=none,file=/var/lib/libvirt/images/test/disk0.raw,format=raw,id=drive-sata0-0-0
-device ide-drive,bus=ahci0.0,drive=drive-sata0-0-0,id=sata0-0-0
The first -device there creates the AHCI controller. The -drive specifies
the disk backing store that will be used. The last -device there connects
the drive to the ACHI controller as an ide-drive.
Regards,
Daniel
--
|: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org -o- http://virt-manager.org :|
|: http://autobuild.org -o- http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|
