Hi Frank, We are still running on our tServer with FLEX-ES 6.x. and z/VM 4.4 and z/VSE 3.1.2. We run the hardware on GMT and use the z/VM system config file to recognize IPL's for daylight savings. We do ours on Friday afternoon at 3:30 since we don't have a shift running on either Sat or Sun.
This time we had a strange error where the FLEX console could not find the VM IPL terminal. I think it is because we also changed the UNIX time to adjust to the constant "drift" that we see with the system time (FLEX/UNIX always ends up running a minute or so fast over a few months). To compensate, we changed our procedure to always do an INIT 6 on the tServer after we change the clock for drift compensation. Here is our system config: /**********************************************************************/ /* TIMEZONE DEFINITIONS */ /**********************************************************************/ TimeZone_Definition CDT West 05.00.00 TimeZone_Definition CST West 06.00.00 TimeZone_Boundary on 2006-03-31 at 11:00:00 to CDT TimeZone_Boundary on 2006-10-27 at 11:00:00 to CST TimeZone_Boundary on 2007-03-09 at 11:00:00 to CDT TimeZone_Boundary on 2007-11-02 at 11:00:00 to CST TimeZone_Boundary on 2008-03-07 at 11:00:00 to CDT TimeZone_Boundary on 2008-10-31 at 11:00:00 to CST TimeZone_Boundary on 2009-03-06 at 11:00:00 to CDT TimeZone_Boundary on 2009-10-30 at 11:00:00 to CST TimeZone_Boundary on 2010-03-12 at 11:00:00 to CDT TimeZone_Boundary on 2010-11-05 at 11:00:00 to CST TimeZone_Boundary on 2011-03-11 at 11:00:00 to CDT TimeZone_Boundary on 2011-11-04 at 11:00:00 to CST TimeZone_Boundary on 2012-03-09 at 11:00:00 to CDT TimeZone_Boundary on 2012-11-02 at 11:00:00 to CST TimeZone_Boundary on 2013-03-08 at 11:00:00 to CDT TimeZone_Boundary on 2013-11-01 at 11:00:00 to CST Ed Zell Illinois Mutual Life (309) 636-0107 ________________________________ From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Frank M. Ramaekers Sent: Friday, March 12, 2010 10:00 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Daylight Saving Time w/ VSE This is the first time (in quite some time) that I've had a Daylight Saving Time (Spring Forward). Last year we did a Fall Backward by shutting the system down for one hour. So, here are my questions: 1) VM time has to be done manually? Has anyone done this via VMUTIL (for example? 2) Does anything need to be done to the z/VSEs (when springing forward)? 3) Will z/VSE pick up the time change when it's changed on VM? 4) Are there special conditions for 2 and 3 above (specifically SET CLOCK/ZONE/ZONEDEF/ZONEBDY settings) Frank M. Ramaekers Jr. Systems Programmer MCP, MCP+I, MCSE & RHCE American Income Life Insurance Co. Phone: (254)761-6649 1200 Wooded Acres Dr. Fax: (254)741-5777 Waco, Texas 76701 _____________________________________________________ This message contains information which is privileged and confidential and is solely for the use of the intended recipient. If you are not the intended recipient, be aware that any review, disclosure, copying, distribution, or use of the contents of this message is strictly prohibited. If you have received this in error, please destroy it immediately and notify us at privacy...@ailife.com. . CONFIDENTIALITY: This e-mail (including any attachments) may contain confidential, proprietary and privileged information, and unauthorized disclosure or use is prohibited. If you receive this e-mail in error, notify the sender and delete this e-mail from your system.