On Thu, 23 Nov 2023 14:20:51 -0600, Jon Perryman <jperr...@pacbell.net> wrote:
>On Wed, 22 Nov 2023 22:35:13 +0000, Seymour J Metz <sme...@gmu.edu> wrote: > >>I suspect that there was a game of telegraph, whereby crucial details got >>lost. >> >>It is normal to allocate page datasets in a user catalog that will eventually >>be used as a master catalog. >> I'm suspicious of the claim that z/OS can use a page dataset that is not in >> its own master catalog, but I can't rule it out. > >There are definitely crucial details lost. Page and swap are special datasets. >For instance, a page dataset can be in multiple catalogs (I think using >recatalog). Pagespace can be in multiple catalogs (which should be a master to the system that is using it) via RECATALOG. I think at one time it had to have a HLQ of PAGE or SYS1 but my memory is fuzzy on that part. I know for a long time the HLQ doesn't matter at all for pagespace and it could still be in multiple catalogs. This also applies to swapspace and VSAM linear ZFS that is indirectly cataloged. Any SYS1 VSAM dataset can be in multiple catalogs via recatalog. Don't ask me where this is documented now. :) I'm guessing "DFSMS managing catalogs". Best Regards, Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS ITIL v3 Foundation Certified mailto:m...@mzelden.com Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
