The behavior you are observing is exactly what our design intended. Like any APAR that is SEC/INT, IBM will not discuss the rationale, design, or implementation.
Jim Mulder -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Mike Schwab Sent: Friday, August 1, 2025 3:52 PM To: [email protected] Subject: Re: Strange S0C4 on z15 Any patches for z15 applied to one but not the other? On Fri, Aug 1, 2025 at 11:10 AM Philippe Leite < [email protected]> wrote: > As I said to Rob, I already knew this POP rule for a long time, but it > doesn't answer this situation I'm facing. > It's exactly the same z/OS 3.1 version (same source and PTF level) but > it's working differently on a z14 and z15. > > Philippe Leite > z/OS System Programmer > > On Fri, Aug 1, 2025 at 1:04 PM salva <[email protected]> wrote: > > > From the POP: > > > > "Fetch-Protection-Override Control > > Bit 38 of control register 0 is the fetch-protection- override > > control. When the bit is one, key-controlled fetch protection is > > ignored for locations at effective addresses 0-2047." > > > > I don't know why it's different in your cases. > > > > El vie, 1 ago 2025 a las 16:40, Philippe Leite (< > > [email protected]>) escribió: > > > > > Interestingly, I am experiencing the same situation here. > > > In an LPAR running z/OS 3.1 on a z14, when I send the command “TSO > ISRDDN > > > B 800.”, I can view the contents of PSA 2048-4095. > > > But when I am in another LPAR with the same z/OS 3.1 on a z15, the > > > same command “TSO ISRDDN B 800.” shows me an error message > > > “Storage > > unavailable.” > > > > > > > > > Philippe Leite > > > z/OS System Programmer > > > > > > ------------------------------------------------------------------ > > > ---- 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 > -- 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
