Our sysplex couple datasets were formatted in 2018 and are working fine at the z/OS 3.1 level.
Mark Jacobs Sent from ProtonMail, Swiss-based encrypted email. GPG Public Key - https://api.protonmail.ch/pks/lookup?op=get&[email protected] On Tuesday, January 6th, 2026 at 9:24 AM, salva <[email protected]> wrote: > Not sure. But I'd try to init and switch at 2.4 level, then IPL at 3.1. > It's only two level away. I made a lot of migration +2 without problem. > > El mar, 6 ene 2026, 15:15, Peter < > [email protected]> escribió: > > > Hello > > > > "Try to init and PSWICH at the 2.4 image" > > > > will it work once zOS 3.1 system is IPLed with 2.4 inited CDS ? or init > > with 3.1 MIGLIB and PSWITCH in 2.4 ? In this case , will 3.1 inited works > > on 2.4 image ? > > > > On Tue, 6 Jan 2026, 17:47 salva, [email protected] wrote: > > > > > But your CDSs mdy be older. > > > > > > Try to init and PSWICH at the 2.4 image. > > > > > > El mar, 6 ene 2026, 13:58, Peter < > > > [email protected]> escribió: > > > > > > > Upgrading from 2.4 to 3.1 > > > > > > > > On Tue, 6 Jan 2026, 16:31 salva, [email protected] wrote: > > > > > > > > > I think you must allocate new and perform the PSWITCH procedue on the > > > > > origin sysplex. > > > > > > > > > > Witch z/OS versions are involved? > > > > > > > > > > El mar, 6 ene 2026, 12:49, Peter < > > > > > [email protected]> escribió: > > > > > > > > > > > The error i got was while IPL where CDS were not usable due to > > > > > > version > > > > > > level. > > > > > > > > > > > > At that point I had to respond to COUPLE dataset prompt and does > > > > > > PSWITCH > > > > > > has ability of copying when the IXC255I message is issued ? > > > > > > > > > > > > On Tue, 6 Jan 2026, 15:44 salva, [email protected] wrote: > > > > > > > > > > > > > The SETXCF PSWITCH command does the magic! > > > > > > > > > > > > > > El mar, 6 ene 2026, 12:23, Peter < > > > > > > > [email protected]> escribió: > > > > > > > > > > > > > > > Hello > > > > > > > > > > > > > > > > So our couplexx member has XCFCDS , WLMCDS and LOGRCDS. > > > > > > > > > > > > > > > > I can allocate a new one and switch to the primary and > > > > > > > > alternate > > > > > > > > but > > > > > > > > how > > > > > > > > do > > > > > > > > I make sure the older policies or definition of CDS are carry > > > > > > > > forwarded > > > > > > > > in > > > > > > > > the new CDS ? > > > > > > > > > > > > > > > > Peter > > > > > > > > > > > > > > > > On Tue, 6 Jan 2026, 15:06 salva, [email protected] wrote: > > > > > > > > > > > > > > > > > An IPL is not required. You can switch to a new CDS using > > > > > > > > > SETXCF > > > > > > > > > COUPLE > > > > > > > > > command. > > > > https://www.ibm.com/docs/en/zos/3.1.0?topic=ma-make-newly-formatted-couple-data-set-available-sysplex > > > > > > > > > > > El mar, 6 ene 2026, 11:33, Peter < > > > > > > > > > [email protected]> escribió: > > > > > > > > > > > > > > > > > > > Is it same procedure for WLMCDS too ? > > > > > > > > > > > > > > > > > > > > On Tue, 6 Jan 2026, 14:09 Mike Schwab, < > > > > > > > > > > [email protected]> wrote: > > > > > > > > > > > > > > > > > > > > > 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 > > > > > > > > ---------------------------------------------------------------------- > > > > > > > > > > > > > > For IBM-MAIN subscribe / signoff / archive access > > > > > > > > > > instructions, > > > > > > > > > > send email to [email protected] with the message: > > > > > > > > > > INFO > > > > > > > > > > IBM-MAIN > > > > > > ---------------------------------------------------------------------- > > > > > > > > > > > > For IBM-MAIN subscribe / signoff / archive access > > > > > > > > > instructions, > > > > > > > > > send email to [email protected] with the message: > > > > > > > > > INFO > > > > > > > > > IBM-MAIN > > > > ---------------------------------------------------------------------- > > > > > > > > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > > > > > > send email to [email protected] with the message: INFO > > > > > > > > IBM-MAIN > > > > > > > > ---------------------------------------------------------------------- > > > > > > > > > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > > > > > send email to [email protected] with the message: INFO > > > > > > > IBM-MAIN > > > > > > ---------------------------------------------------------------------- > > > > > > > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > > > > send email to [email protected] with the message: INFO > > > > > > IBM-MAIN > > > > ---------------------------------------------------------------------- > > > > > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > > > send email to [email protected] with the message: INFO > > > > > IBM-MAIN > > > > > > > > ---------------------------------------------------------------------- > > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > > send email to [email protected] with the message: INFO IBM-MAIN > > > > > > ---------------------------------------------------------------------- > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > send email to [email protected] with the message: INFO IBM-MAIN > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: INFO IBM-MAIN > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
