Comment 21 for bug 1560965

Hi Guys,

Any news about this bug ? it still happen in Ocata.
If you use nova along with "hw_scsi_model=virtio-scsi" and "hw_disk_bus=scsi" to launch your instances, you can't attach a new cinder volume then, because of the error "libvirtError: internal error: unable to execute QEMU command 'device_add': Duplicate ID 'scsi0-0-0-0' for device", and as a result of this the / volume turns in read-only state.
Nova uses the same name for both the / volume and the new cinder one, both are /dev/sda.