IMM2 reports backup GUID Partition Table (GPT) corruption detected after server restart

Have been seeing this on a few IBM / Lenovo x3650 M5 servers lately:

gpt error

It was not all servers in a cluster that showed it, even if they had same firmware level and access to the same storage.

It then turned out to be a firmware issue on the SATA / SAS HBA, IBM made a KB available here, with a download link for the fixed firmware:

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