In other words there is no way to remove a CPU without an IPL - is that correct?
Thank you, Scott R Wandschneider Senior Systems Programmer Infocrossing Office 402.963.8905 -----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Alan Altmark Sent: Wednesday, June 04, 2008 12:23 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Define/Remove CPU from an MVS Guest On Tuesday, 06/03/2008 at 05:26 EDT, "Wandschneider, Scott" <[EMAIL PROTECTED]> wrote: > I now know that the MACHINE ESA 4 statement authorizes the guest to use > up to four CPUs. I successfully executed a DEFINE CPU 03. However, MVS > could not configure the 4th CPU online since it did not know about it at > IPL time. Okay but, with the 4th CPU defined and not doing anything, > how would one go about safely removing CPU 03 short of an IPL? Yes, I > tried the DETACH CPU 03 command and watched the MVS system IPL. You don't. If you DETACH a CPU, the virtual machine will RESET. (If you have SET CONCEAL ON or OPTION CONCEAL, that will cause the guest to re-IPL automatically.) Alan Altmark z/VM Development IBM Endicott
