David, CP doesn't need a PAGE pack to start: it can and will page in spool packs when PAGE is full or not existent. Only when spool is full too, then CP dies.
2011/8/9 David Boyes <dbo...@sinenomine.net> > This method works fine, however, I’m wondering if backing up the page packs > is necessary? I was thinking that maybe I could backup only 1 page pack so > that I can get z/vm up and then just init the remaining packs after coming > up. **** > > ** ** > > I’ve done it both ways. If you have flashcopy in the disk hardware, the > “back up one, flash the others, clip the labels with DDR” is really, really > efficient, and trivially easy to automate (at one site, we ran that way > normally – made it really easy to avoid the “write one page at IPL on a page > pack and then you can’t drain it” problem discussed here recently). Just > make sure that you have a short delay in your AUTOLOG1 startup (or do the > flash/clip in AUTOLOG1) so you can stop the whole system from initializing > before the page packs are online – running out of page space during IPL is > kinda icky. **** > > ** ** > > You do need to back up a fully-formatted page pack (processed with CPVOL > FORMAT) because you’ll get paging errors and weird horrible flaming deaths > that are really hard to find if the pack is not completely CP formatted. * > *** > > ** ** > > Since the page packs are listed as cpvols in system config, would z/vm even > come up if it couldn’t find all of them? **** > > ** ** > > For PAGE space, z/VM is perfectly happy to come up without them (as long as > you have lots of RAM or at least one PAGE area available). SPOL packs are > the ones you REALLY care about having all the pieces.**** > > ** ** > > At DR site, we bring up a z/os “rescue” system in order to run restore jobs > for both z/os and z/vm volumes. Afterwards, our z/vm and z/os systems run > as second level guests. Maybe I need a “rescue” z/vm system as well? *** > * > > ** ** > > We do it the other way around – z/VM first, then z/OS and the other guests. > A 1 pack z/VM system is very quick to restore and will let you bring up > multiple z/OS guest systems and the restore will go much easier. With a > little thought, you can automate the whole process with an exec – it leads > to lots of amusement during DR when you load 1 or 2 tapes, IPL VM and just > sit there drinking coffee while everyone else does fire-drill. 8-)**** > -- Kris Buelens, IBM Belgium, VM customer support
