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Shawn Bodily's POWER/AIX/AI BlogFirst off, prior to finding this that you are reading currently, I can only assume you tried internet searching this error as I did. I found nothing of any value in troubleshooting the problem above and beyond what the actual error message states. So hopefully you find this tip helpful.
For reference the full error is:
“CMMVC5969E The Remote Copy relationship was not created, either because there are no online nodes in the I/O group or because there are unrecovered FlashCopy mappings or unrecovered Global Mirror or Metro Mirror relationships in the I/O group”
This error was encountered when creating additional remote copy relationships. We started with a new IBM FS7300 storage unit, created ~ 150 relationships over a couple weeks time from an existing v7000. When adding more we hit this error. Now we checked and tried things the error message suggested, like FlashCopy mappings, of course the I/O group is online, to no avail. So instead of boring you with all the history, let me just get straight to the resolution.
It turns out to a be a default memory limitation on some functions. In this case remote mirroring of 20MB, it had been exhausted. We checked and sure enough it was 20MB with 0 free as can be seen via lsiogrp 0.
remote_copy_total_memory 20.0MB
remote_copy_free_memory 0.0MB
We changed it to 100MB via the GUI, under Resources, to match the source system as shown below screen shot.
We could then create all relationships, added them to the CG, started replication just fine. The new totals ended being as follows.
remote_copy_total_memory 100.0MB
remote_copy_free_memory 46.7MB
Now there are similar settings for FlashCopy and Volume Mirroring. In our case we also changed the FlashCopy to 200MB to match our source system. Ultimately our new storage is replacing the existing so we probably should’ve started like for like. I simply didn’t know any better. Hopefully if you read this, you didn’t either, but you do now.
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