What does the powervc-diag command do?
It collects diagnostic data from management nodes, all HMCs, all NovaLink and all network nodes.
It collects specific logs from the VIOS.
It performs a full system health check.
It displays version information of PowerVC, NovaLink and the host operating system.
https://www.ibm.com/docs/en/powervc/2.0.0?topic=problems-powervc-diag-command
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