On Mon, 6 Jan 2014 10:31:05 -0600, John McKown wrote:
>
>... I also tend to put comments in the JCL when I switch from DISP=OLD to
>DISP=SHR which says something like (after the DD referencing the DSN):
>//* THIS IS THE LAST STEP WHICH UPDATES ... FURTHER STEPS ONLY READ IT.
> 
Kinda makes you wish for an explicit "DSNOPTS=O_RDONLY"-type operand
in allocating legacy data sets, doesn't it?

-- gil

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