To swap sysplex data sets, Define new datasets. Use capacity tool for sysplex data sets to determine needed size, or define as twice the actual current used amounts. Use new datasets with the first IPL on the new level, then have other IPLs on the new system join the sysplex using the new datasets. To fall back, IPL with old datasets.
On Tue, Jan 6, 2026 at 12:53 AM Peter <[email protected]> wrote: > > Hello > > During the upgrade of zos 3.1, I got this below mesaage as . I believe the > CDS was not formatted correctly to the level of zos 3.1 > > Ours is a monoplex. Is there a way to upgrade the current couple from z/OS > 2.4 to z/OS 3.1 > > IXC255I UNABLE TO USE DATA SET > > SYS1.XXXX.XCFCDS1 > > AS THE PRIMARY FOR SYSPLEX: > > > IT WAS CREATED AT A FORMAT LEVEL LOWER THAN THIS SYSTEM REQUIRES > > > > Regards > Peter > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
