http://bugzilla.opensuse.org/show_bug.cgi?id=921570 http://bugzilla.opensuse.org/show_bug.cgi?id=921570#c12
--- Comment #12 from Hannes Reinecke hare@suse.com --- If you were to enable multipath on a non-multipathed root system you need to blacklist the root filesystem.
Also, due to the timing involved multipath might claim the device for MD, so if MD references the devices as raw block devices (ie using /dev/sdX) it won't be able to start.