http://www.redbooks.ibm.com/redbooks/pdfs/sg246982.pdf
PDF page 63-64, printed page 47-48.

On Thu, Oct 2, 2014 at 5:12 PM, Storr, Lon A CTR USARMY HRC (US)
<lon.a.storr....@mail.mil> wrote:
> Classification: UNCLASSIFIED
> Caveats: NONE
>
> Hello List,
>
> It appears that some of the old restrictions regarding MCAT-cataloging of 
> installation-allocated datasets that are accessed during system 
> initialization (usually for OUTPUT) have been relaxed.
>
> I have verified that page datasets must still be defined in the MCAT but, 
> other than that, I haven't yet found any absolute restrictions. Even couple 
> datasets, it seems, may be in a UCAT if a volser is specified in COUPLExx.
>
> So far, I've checked SMF (MAN) datasets, BRODCAST, "couple", UADS, USS file 
> systems (including root) and DFSMS ACDS/COMMDS. I find no text explicitly 
> forbidding UCAT cataloging.
>
> I'm fairly certain that the CATALOG address space must be active before UCATs 
> are accessible but I'm rather fuzzy about exactly where in the system 
> initialization timeline this occurs (i.e. relative to the components that 
> want to access these datasets).
>
> What other installation-allocated datasets that z/OS accesses during system 
> initialization must be MCAT-cataloged?
>
> Thanks,
> Alan
>
>
>
>
>
> Classification: UNCLASSIFIED
> Caveats: NONE
>
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-- 
Mike A Schwab, Springfield IL USA
Where do Forest Rangers go to get away from it all?

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