docs: def _offline_fcp_device(self, fcp, target_wwpn, target_lun, multipath):
          """sles offline zfcp. sampe to all rhel distro."""
          device = '0.0.%s' % fcp
          # disk config
          disk_config = '/sbin/zfcp_disk_configure ' +\
                        '%(device)s %(wwpn)s %(lun)s 0' %\
                        {'device': device, 'wwpn': target_wwpn,
                         'lun': target_lun}
          # host config
          host_config = '/sbin/zfcp_host_configure %s 0' % device
          return '\n'.join((disk_config,
                            host_config))