If you are thinking about recataloging them in the right order using DEFINE NONVSAM, it has been a while since you had to figure this out on your own. In every supported release of z/OS, IDCAMS DEFINE with RECATALOG will figure out the order of multivolume data set entries for you.

I had to go all the way back to z/OS V1.12 to find this announcement text:

"The IDCAMS DEFINE RECATALOG command is enhanced for multivolume and striped data sets. This new function is designed to automatically create catalog entries with correctly ordered volume lists while eliminating any duplicate volumes that might have been specified. This will make it easier to recatalog multivolume and striped VSAM data sets."


Vernooij, Kees - KLM , ITOPT1 wrote:
And consider multi-volume datasets, you should reconstruct their order.
<snip>

--
John Eells
IBM Poughkeepsie
[email protected]

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