Library /sys$common/syshlp/sysmanhelp.hlb IO, SCSI_PATH_VERIFY, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  SYSMAN> IO SCSI_PATH_VERIFY
  SYSMAN> IO AUTOCONFIGURE

      The first command in this example checks all SCSI paths and
      disconnects the ones that are no longer valid. The second
      command autoconfigures all devices that are physically attached
      to the system.