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

  SYSMAN> IO REBUILD
  SYSMAN> IO AUTOCONFIGURE

      The first command in this example rebuilds device configuration
      tables. The second command reads the device configuration
      tables and loads drivers for newly defined drivers.