'Detach the volume from instance_name.'

def disconnect_volume(self, connection_info, disk_dev, instance):

    LOG.debug('calling    os-brick    to    detach    FC    Volume')
    self.connector.disconnect_volume(connection_info['data'], connection_info['data'])
    LOG.debug('Disconnected    FC    Volume    %s', disk_dev)
    super(LibvirtFibreChannelVolumeDriver, self).disconnect_volume(connection_info, disk_dev, instance)
