> -----Original Message----- > From: IBM Mainframe Discussion List On Behalf Of Peter Hunkeler > > Just found this in the V1.13 Migration manual: > > *Description:* In parmlib member DIAGxx, you can specify the virtual location > of the LCCA control > block (mapped by the IHALCCA macro) or the location of the */_PCCA_/* control > block (mapped by the > IHAPCCA macro) to be used when a CPU is brought online. Before z/OS V1R12, if > the IHALCCA or IHAPCCA > structures specified on the CBLOC VIRTUAL24 or > VIRTUAL31 keyword of DIAGxx did not specify either the 24-bit > (VIRTUAL24) or 31-bit (VIRTUAL31) location, the default location for the LCCA > or */_PCCA_/* was in 24- > bit virtual storage. > > Beginning with z/OS V1R12, the default location for the LCCA and > */_PCCA_/* is now in 31-bit virtual storage if you do not specify > VIRTUAL24 or VIRTUAL31 for the structures IHALCCA and IHAPCCA. If only one > standard processor is > online during the IPL, the LCCA and */_PCCA_/* of the IPL CPU will be in > 24-bit storage regardless of > the specification. If there is more than one processor, and DIAGxx permits > it, you'll have the LCCA > and */_PCCA_/* in 31-bit storage.
From this it seems reasonable to conclude that the OP's TEST system is "single-engine" while his PROD system is "multi-engine". It seems less reasonable to conclude that he coded CBLOC VIRTUAL24 in DIAGxx on his TEST system but not on his PROD system. Who'd have thought that the number of CPUs online would affect the default virtual location of LCCA and PCCA? -jc- ********************************************************************** Information contained in this e-mail message and in any attachments thereto is confidential. If you are not the intended recipient, please destroy this message, delete any copies held on your systems, notify the sender immediately, and refrain from using or disclosing all or any part of its content to any other person. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
