Ranga Nathan wrote:
I have snapped the RES, WRK and SPL volumes to another set of volumes. Now I want to make sure that I can IPL from the backup volumes. My thinking is:
Shutdown z/VM and the guests Re-name volids for existing 510RES, WRK and SPL to something else. Re-name volids of the backups to correspond to 510RES etc. IPL from the new 510RES with appropriate address.
Will this work? Are there any gotchas?
It would work, but it's not the way any veteran VM'er would do it.
Son, it's time you learned about second level test VM systems. :-)
It's also time you subscribed to [EMAIL PROTECTED] Trust me, you're part of the target audience for that list as well as this list.
However, since someone's about to jump all over for me for being coy instead of helpful, here's the answer you want:
Don't do it that way.
You can IPL those volumes in a guest virtual machine. You can do it in any large enough virtual machine (let's say 64 MB or 256 MB for a test of a minimal system). Use a class G userid, not a more privileged userid like MAINT. In particular, don't do it from a Class A userid, just in case you issue SHUTDOWN from the wrong place and shut down the wrong system. Not that I've ever done that, but I've heard stories.
Log on to the userid.
ATTACH the volumes to the userid.
Issue the command TERM CONMODE 3270 -- this will blow away CMS, but that's OK; in a step or two, CMS would be blown away as you IPL VM in the virtual machine.
Do a Q CONS to get the address of the virtual console.
IPL nnn LOADPARM CONS=cuu
where nnn is the address of 510RES and cuu is the virtual console address.
I'm doing this off the top of my head, so I may have a detail or two wrong, but this is most of it. You probably would want to DEF GRAF some terminals before you IPL the guest so you can dial into the guest and log onto MAINT on the second level system.
Like I said, ask on VMESA-L, and you'll get some more ideas.
Nick
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