We put on about a year's worth of z/OS 1.10 maintenance in mid February
to get things up to RSU1001++.  May have included some corrective
maintenance beyond RSU1001 that we  could have done without, but
everything seemed to be functional in our MVS test environment and
looked OK to go live last weekend.

We were forced to back out maintenance after encountering a problem now
being tracked as APAR OA32369, which  caused an outage for us on all SNA
3174-81R and 3174-23R controllers driven through a Fast Ethernet OSA
adapter on a z9.  The APAR OA32369 description is totally unclear to me
as to what could be affected and how persistent the problem might be,
but for us none of the LU's for coax-attached dumb terminals or
coax-attached 4224 printers behind these 3174 controllers would activate
after maintenance.  This old hardware is being gradually phased out and
has been so stable for so long we didn't even have any accessible from
our test system.  We do now!

IBM indicated the problem may have been caused by FMID HVT61A0 PTF
UA51696/OA30776, which I believe is on PUT 1002 and not yet assigned to
an RSU; but at least as of Friday afternoon there weren't yet any PE
holds on UA51696.  We have been offered an APAR fix and will look at
that option next week.

-- 
Joel C. Ewing, Fort Smith, AR        [email protected]

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