/sys$common/syshlp/MSA_UTIL_HELP.HLB
ADD, UNIT, Qualifiers, /CACHE
 *Conan The Librarian 

         Determines whether the controller's cache should be used for the
         UNIT. Caching is ON by default. To disable caching, use a /NOCACHE
         qualifier with SET UNIT or ADD UNIT commands.
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