If I may, one thing to keep in mind. The UCB is located in the SQA or ESQA. So, depending on how many devices you have setting LOCANY to YES could have an impact on your ESQA area. This is also something to think about at IPL time. I believe there is a time thing related to when the UCBs are loaded and the full ESQA is allocated. That is part of the reason I added the INITSQA parameter to the LOAD member for my lpars.
The full write up for INITSQA can be found in the MVS Initialization and Tuning Reference. Also in that manual is some information related to what happens with SQA/ESQA related to UCBs and the IPL process. Paul -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Binyamin Dissen Sent: Friday, September 27, 2024 7:03 AM To: [email protected] Subject: Re: Which option(s) tells zOS to use 31 bit UCB addresses? OK, I created a HCD.PROFILE and specified the option. /* ****************************************************************** */ /* */ /* HCD Profile */ /* Created : 2024-09-27 14:57:36 by user : B1D */ /* */ /* ****************************************************************** */ /* ****************************************************************** */ /* */ /* HCD Profile Section for Standard Profile Options */ /* */ /* ****************************************************************** */ OS_PARM_DEFAULT = LOCANY,YES What steps are required before the IPL? 1. Build production I/O definition file 2. Build IOCDS 3. Build IOCP input data set 4. Create JES3 initialization stream data 5. View active configuration 6. Activate or verify configuration dynamically 7. Activate configuration sysplex-wide 8. (no longer supported) 9. (no longer supported) 10. Build I/O configuration data 11. Build and manage processor cluster IOCDSs, IPL attributes and dynamic I/O changes 12. Build validated work I/O definition file On Fri, 27 Sep 2024 18:07:34 +1000 Attila Fogarasi <[email protected] <mailto:[email protected]> > wrote: :>HCD specifying LOCANY yes. Note z/OS provides "captured UCB" which gives :>24 bit view of the 31 bit UCB to allow old programs to work (IOSCAPU :>macro). Works surprisingly well. :> :>On Fri, Sep 27, 2024 at 1:21?AM Binyamin Dissen < :>[email protected] <mailto:[email protected]> > wrote: :> :>> Went thru the Init & Tuning Reference and no luck. :>> :>> -- :>> Binyamin Dissen <[email protected] <mailto:[email protected]> > :>> http://www.dissensoftware.com :>> :>> Director, Dissen Software, Bar & Grill - Israel :>> :>> ---------------------------------------------------------------------- :>> For IBM-MAIN subscribe / signoff / archive access instructions, :>> send email to [email protected] <mailto:[email protected]> with the message: INFO IBM-MAIN :>> :> :>---------------------------------------------------------------------- :>For IBM-MAIN subscribe / signoff / archive access instructions, :>send email to [email protected] <mailto:[email protected]> with the message: INFO IBM-MAIN -- Binyamin Dissen <[email protected] <mailto:[email protected]> > http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] <mailto:[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
