Step 4.10.1.1 Starting with z/OS V2R5, JES2 no longer supports the z11 level for checkpoint data sets. z22 mode was introduced in z/OS V2R2.
https://www.ibm.com/docs/en/zos/2.4.0?topic=SSLTBW_2.4.0/com.ibm.zos.v2r4.e0zm100/Export_zOS_V2R4_to_V2R5_Upgrade_Workflow.html#mark147 Joe On Thu, Aug 18, 2022 at 6:06 PM IBM user <[email protected]> wrote: > Hi Mark, > > Thanks. Been down that path. The APAR states that the release doc is > "explicit" in the need for z22 mode, but in fact it is silent. > > Now I look in the 2.5 JES2 Tuning and Initialization Reference, and find > the answer: > COLD_START_MODE = z11 | z22 | DEFAULT > So, it seems they IBM was thinking of changing z22 mode to a requirement, > but backed off. > > IBM User > > ----- Original message ----- > From: Mark Jacobs <[email protected]> > To: [email protected] > Subject: Re: Is JES2 z22 mode required on z/OS 2.5? > Date: Thursday, August 18, 2022 10:12 AM > > Look at this APAR, it should answer your question. Yes, it is. > > https://www.ibm.com/support/pages/apar/OA62594 > > Mark Jacobs > > Sent from ProtonMail, Swiss-based encrypted email. > > GPG Public Key - > https://api.protonmail.ch/pks/lookup?op=get&[email protected] > > > ------- Original Message ------- > On Thursday, August 18th, 2022 at 9:45 AM, IBM user <[email protected]> > wrote: > > > > Is JES2 z22 checkpoint mode required as pre-req for z/OS 2.5? > > > > I see mention of this in Marna Walle's presentations, > > > > -- Activate z22 mode -(REQUIRED-IF, as of V2.5) > > > > and perhaps it was being considered at one time, but I am unable to > locate any record of this requirement in the z/OS 2.5 release manuals. > > > > Any ideas? > > > > ---------------------------------------------------------------------- > > 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
