Hmmm... how did it get that far off?  Some Operator with a self-wind 
wristwatch (implying that lack of motion by the operator slowed the 
watch).  :-)

We used to have PROFS users complaining that their PROFS Reminders were 
popping late, making them late for meetings.  That was back on a 3083 or 
so, when the TOD clock drifted a couple minutes every week.  We sent 
little 1.5" round LCD clocks to stick on the edge of their 3270s (it was 
"a while" ago).

One thing you can do is change the time on the HMC, and then the next time 
VM is IPLed it should pick up the new time.  That's good to do regardless.

Before doing the following, ask yourself how important the current time is 
on that VM system...
and then ask yourself how much you trust the time source that shows you to 
be 6 minutes off.
Shortwave radio station WWV is a pretty accurate source.  :-)

>From a Class A user issue
CP DEFINE TIMEZONE CST WEST 05.54.00 
that will set CST to be 6 minutes sooner that the TOD clock shows, 
adjusting the epoch offset to give you your right time. 
CP SET TIMEZONE CST 
that will cause every virtual to receive an interrupt and message: 
hh:mm:ss HCPTZN6759I The time zone has changed to CST.
How each virtual machine handles the interrupt is something you'll have to 
learn from others on the list.  There has been recent discussion of VSE 
interrupt handling just this week.
The next time you IPL VM, the normal SYSTEM CONFIG timezone_definition 
should return you to "CST WEST 06.00.00", and pick up the HMC TOD change.

Mike Walter
Hewitt Associates
The opinions expressed herein are mine alone, not my employer's.



"Randy Dray" <[EMAIL PROTECTED]> 

Sent by: "VM/ESA and z/VM Discussions" <[email protected]>
11/02/2005 04:22 PM
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Subject
Reset Time Command






How about a command to adjust the tod clock.

I did a q time and

VM USER ID:  VSE272 

 
* cp q Time 
AR 0015 TIME IS 16:13:28 CST WEDNESDAY 11/02/05

its really 16:19:30

My time is 6 min slow.

is thier a set command that would allow me to adjust
this????


Thanks
 
 

Randy Dray
Systems Programmer
Morton Buildings Inc.

Morton IL

(309) 263-6397


 
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