We have a dedicated install environment. So a new zvm gets it's own guest system. A distribution system that contains directories and local configuration members is used for building new VM images.
When we build a new VM, or rather build a new respack, we copy (DDR and/or CMS COPY) only those minidisks from the installation image we actually need in our production VM's. Some minidisks are rebuild with our own code. Such as a PROFILE EXEC on the AUTOLOG1 191 or a dedicated configdisk for CMS services. That will leave us with 1) a respack with only IBM code we need for production images and 2) a dedicated spool pack for this zvm version. The respack doesn't hold any data we want to keep (for instance EREP, MONWRITE, DISKACNT etc) and other DASD do not contain any minidisks that are part of the IBM code. The directory gets loaded with the current production directory but obviously with the new IBM minidisks (the minidisk extents usually do not change in a new version so we take the old directory and change the volumelabel for the respack). Because the code is separated from the data we never have to copy datadisks from a live production image. The only thing we have to move during a migration are the spoolfiles from the old SPOOL pack. Obviously it will take some time to sort out the minidisks but it will save a lot of time when building or migrating a (new) VM. Regards, Berry. Crabtree, Anne D schreef: > > When I installed and customized z/vm 5.3, the only things I changed on > the respack were MAINT, TCPMAINT, and AUTOLOG1 stuff. Everything else, > like linux instances 191 disks, DISKACNT and ACCSRV 191s, ESAMON’s > stuff, etc, I put on the 530W01 pack. So, when I installed z/vm 5.4, I > just copied 530W01 to a volume named 540W01 using DDR utility. > Everything seems fine and I was just wondering if the experts out > there would make me feel better by saying that’s a good idea or shoot > me down by saying that’s a terrible idea because… > > Anne D. Crabtree > > System Programmer > > WV Office of Technology Data Center > > 1900 Kanawha Blvd East > > Charleston, WV 25305 > > (304)558-5914 ext 58292 > > (304)558-1441 fax >
