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

  SYSMAN> IO SET EXCLUDE=(DKC500,DKD*)

      This example specifies that DKC500 and all DKD devices are not
      to be autoconfigured.

      Refer to the /SELECT qualifier for additional examples that
      show how to specify device names.