'Call connector.connect_volume() and return the path.'

def _sio_attach_volume(self, volume):

    LOG.debug('Calling    os-brick    to    attach    ScaleIO    volume.')
    connection_properties = dict(self.connection_properties)
    connection_properties['scaleIO_volname'] = self._id_to_base64(volume.id)
    connection_properties['scaleIO_volume_id'] = volume.provider_id
    device_info = self.connector.connect_volume(connection_properties)
    return device_info['path']
