On Fri, Nov 5, 2010 at 10:44 AM, Anthony Thompson <anthony.thomp...@nt.gov.au> wrote: > Excuse me? > > If you re-IPL a virtual machine surely it resets its environment according to > USER DIRECT? A virtual subset of the existing IOCDS, with the virtual > addresses and user(sic)-defined storage?
Incorrect. An IPL of the virtual machine clears some volatile things (does a RESET) and then loads the operating system (again). Any configuration changes that you made to your virtual machine remain since logon remain in effect. Depending on the operating system, some changes require an IPL to actually exploit the new configuration. > What do you inherit from a previous instance of a virtual machine? Bit > confused here, but I freely admit I'm a z/OS person. Isn't LINKing devices > (190, 490, whatever) simply part of your VM profile? And isn't expanding > storage limited by what is in USER DIRECT? If you set DEF STOR in CP/CMS and > re-IPL your user machine, how does the next iteration remember it? Your last question shows you correctly spotted the mistake in your initial assumptions ;-) Only LOGOFF / LOGON creates a new virtual machine like specified in the current directory. Many of the configuration changes can be done through CP commands, but it is sometimes easier to go the full logoff/logon cycle (it also demonstrates it will work next time after you forgot about these changes). Indeed, any configuration changes to your virtual machine are restricted by the directory and external security manager, and sometimes by available system resources. | Rob PS My guess is that OP was not aware that DIRMAINT was installed, and thus activated a (slightly modified) old USER DIRECT. If DIRMAINT is still running, DIRM DIRECT would restore things. Otherwise, depending on the changes since then, autologging of DIRMAINT might still work... ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
