On Thursday, 07/28/2011 at 11:23 EDT, "Wandschneider, Scott" <scott.wandschnei...@wipro.com> wrote: > We have a host VM system (z/VM 5.4 0902) that is located on the east coast of > the USA with a time zone of "WEST 04.00.00" however the actual TOD clock is > behind by four (4) minutes. Scheduling an IPL is difficult as this system hosts > many clients. To adjust the TOD clock, without an IPL, it has been suggested > that I issue the following two commands, which appears to have worked on a > second level 2.4 VM/ESA system. Comments and suggestions from this group would > be appreciated. > > DEFINE TIMEZONE EDT WEST 03.56.00 > SET TIMEZONE EDT
Other than IPL, there is no mechanism in VM to adjust the system TOD. Changing the time zone affects only how CP calculates *local* time, in turn affecting any interface that asks CP for local time, including QUERY TIME, diag 0x0C, and diag 0x270. The SET VTOD command is available if you want to influence the TOD seen by a guest. (It has no effect on CMS since CMS uses CP time.) Alan Altmark Senior Managing z/VM and Linux Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott
