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?
> > > > > > >
> > > > > > >
> > > >
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