ty for this information, but I do not follow how the last cylinder of any pack on the IIS being unused allows you to name the real packs anything you want while still retaining the default names for the 2nd Level system.
Could you explain in a little more detail? Jeff Gribbin <jeff.grib...@gmail.com> Sent by: The IBM z/VM Operating System <IBMVM@LISTSERV.UARK.EDU> 10/01/2010 01:35 PM Please respond to The IBM z/VM Operating System <IBMVM@LISTSERV.UARK.EDU> To IBMVM@LISTSERV.UARK.EDU cc Subject Re: Applying Maintenance - Best Practice Just in case this helps ... If your test system will never be IPLed 1st-level, are you aware that IBM deliberately does not allocate the last cylinder of any pack (3390-3 or 3390-9) that is part of an Initial Installation System? (That is, 540RES, etc.) because the last cylinder is not used, these packs can all be accommodate d using minidisks that begin at real cylinder 1 - allowing you to name the real packs whatever you wish and still retain the default names for your virtual second-level packs. I am trying to encourage IBM to make this information more obvious and well-known but for some reason they feel reluctant so to do. However, I have had a clear indication (in reply to a Reader's Comment) that they intend to continue to do this so I think it's fairly safe to go ahead on the assumption that the last cylinder of a, 'default installation' volume wil l not be referenced. In my view this approach makes much more sense than fiddling around with real volsers - I am a great believer in keeping all guests away from real cylinder zero except when this is absolutely unavoidable. Regards Jeff
