On 02/03/2012 08:36 PM, Joel C. Ewing wrote: > In absence of sysplex timer or the like, the processor TOD clock is set > only at POR and is set based on the HMC clock, which may in turn sync > once a day with the SE clock. The SE is sync'd to the CEC TOD and the HMC is sync'd to the SE. The SE is sync'd to the CEC TOD every 24 hours, 4 hours or 1 hour depending on MCL level. The current best practice is to keep the CEC TOD accurate via an external time source which in turn keeps the SE and HMC accurate. This requires STP or sysplex timers.
George Kozakos z/OS Software Service, Level 2 Supervisor ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
