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by nacos 3812 days ago
I don't know how they decommission a zSystem.

But from what the mainframe guys at work told me, hardware between 2 z boxes are pretty much the same and it's kind of licensed by load usage or components usage.

So if you want to downgrade or upgrade memory/CPUs/etc. (to a certain degree), it's just a matter of having an IBM tech to enter the right license in the console.