return disk, dm
				}
			}
		}
	}
	return "", ""
}

// given a wwid, find the device and associated devicemapper parent
func findDiskWWIDs(wwid string, io ioHandler, deviceUtil volumeutil.DeviceUtil) (string, string) {
	// Example wwid format:
	//   3600508b400105e210000900000490000
	//   <VENDOR NAME> <IDENTIFIER NUMBER>
	// Example of symlink under by-id: