HELPLIB.HLB  —  SET  VOLUME  Qualifiers  /DATA_CHECK
       /DATA_CHECK[=(option[,...])]

    Defines a default for data check operations following all read
    and write operations to the specified volume. (If you do not
    specify the /DATA_CHECK qualifier, no checks are made.) Keywords
    are as follows:

    [NO]READPerforms checks following all read operations.
    [NO]WRITPerforms checks following all write operations (default).
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