Comment 1 for bug 1350224

From the basic code logic from vmware driver. It looks like it is currently only dealing with volumes with operating systems(root disk). It will always attach the root disk.

if not ebs_root:
.....
else:
            # Attach the root disk to the VM.
            for root_disk in block_device_mapping:
                connection_info = root_disk['connection_info']
                self._volumeops.attach_root_volume(connection_info, instance,
                                                   self._default_root_device,
                                                   data_store_ref)