Exactly.  STP is the only function that I know of (other than the old Sysplex 
Timer) that can keep the clock accurate.  We are currently using it with two 
CECs, but we will be getting rid of one CEC in the near future.  I can't see 
any way that I can keep my clock accurate without STP.  PORs are few and far 
between these days, far too much clock drift can occur during that time.

>>> Edward Jaffe <[email protected]> 12/19/2008 12:35 PM >>>
Every day, our new HMC gets time from NIST or other atomic clock source 
via the Internet. When we POR, the SE takes the time from the HMC. So, 
we're in sync at POR time. But then what? Is there something that 
"steers" our z10's TOD clock to re-sync with the HMC each day after it 
gets updated?




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