Time Synchronization via 9037

0 pts.
Tags:
Hardware
Mainframe
If we use a 9037 as the time source to provide the time for the z/OS (or OS/390) system, what will happen to the clock that the zSeries box already has? Is the clocking going to be entirely external and the internal clock is then sort of paralyzed and no longer used, so that when the 9037 clock somehow ceases(inadvertently powered off for example), the entire z/OS system is also down because there is no clocking? Can the internal clock of the zSeries box keep running and the system still alive?
ASKED: May 12, 2005  2:46 AM
UPDATED: June 2, 2005  2:10 PM

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Search390.com member Harvey L. wrote:

There is a Flash on ResourceLink, FLASH10041, that explains in detail how 3097 failures affect the SYSPLEX. There is APAR OW44231 that affects recovery. Without it, IPLs are required. With it, message IEA015A THIS SYSTEM HAS LOST ALL CONNECTION TO THE SYSPLEX TIMER (and other info text) is issued. After the 3097 is recovered, you can issue a RETRY. If recovery is not possible, reply with ABORT.

Recommendation: Refer to FLASH10041, titled “Surviving a 9037-002 Sysplex Timer Failure – OS/390 APAR Enhancement”. I found it on ResourceLink using the search argument 3097.

I hope that this helps.

Regards, Harvey

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