the Recovery Guru describes the error or the affected component in detail.
Where I can find such detailed information for critical/warnings events that have already been resolved?
The event log shows that there was a critical/warning event, but no longer the exact component - (e.g. "Volume not on preferred path due to AVT/RDAC failover" - the exact volume that was affected is not shown anymore).
Is this information stored in any other log (which may be read with SMcli)?
If the system is sending back ASUP, then you can go to the AIQ site and look for the support bundle for when the alert happened. If not and it is not too long ago, it should still be in MEL and you would need to scroll through them.