Moving all systems to new external storage subsystems

Currently all of our i lpars are running on external storage behind 2 VIOs in each box and we need to migrate to new external storage subsystems. A while back I opened a PMR to IBM asking about migrating the load source and there was a short discussion here about this kc article: https://www.ibm.com/support/knowledgecenter/en/ssw_ibm_i_72/rzaly/rzalylsnprot.htm

Is there a different kc article that addresses doing this with external storage? This one has a step:

Move the replacement disk unit.
1. Move the replacement disk unit that contains the load source information into the slot where the old load source disk unit (unit 1) originally resided.

Isn't that sort of a moot point since all the ldevs are vio hosted on external storage? Perhaps just need to update the Tagged IO to the new adapter that the new load source is attached to?

Also, is there a kc article that outlines moving all of the non-load source volumes? Or is there nothing more to it than STRASPBAL *ENDALC and *MOVDTA?

Thanks
Dana



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