[libvirt-users] machine='pc-q35-2.1' and sata controller

Hello. I'm not able to disable the sata controller on a machine='pc-q35-2.1' type VM. Whenever i delete: <controller type='sata' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/> </controller> it gets added again when i close the editor. The reason i would like to delete the sata controller is this error while trying to migrate the machine: 2015-02-23 19:04:11.181+0000: 1972: error : qemuMonitorJSONCheckError:381 : internal error: unable to execute QEMU command 'migrate': State blocked by non-migratable device '0000:00:1f.2/ich9_ahci' Someone has an idea to solve this? thanks and cheers t.