We've inherited an installation of ZOS 2.4.0 which was installed in the Summer of 2021 (06/2021). There was no information that any SMP/E maintenance was installed after that ServerPac. What is the best recommendation now days for catching up a system dated a couple years ago to the most current available 'requred' or 'recommended' maintenance levels? I found a good document to review the basics of the methods:
https://public.dhe.ibm.com/systems/z/servicetest/zOS_Preventive_Maintenance_Strategy.pdf
What is the best method to (1) catch up the maintenance, then (2) keep it current (quarterly RSU's or monthly RSU's)
Appreciate your advice!
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Lynn Gilson
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