From the HPE ProLiant System Utilities (BIOS) I booted into HPE Smart Storage Administrator (SSA) to migrate a logical drive with RAID6 (and existing data) to RAID5. After starting the migration task, which would need several hours to complete, the only thing I could do was clicking on X in the top right corner. After that I was stuck on a screen saying:
After completing the configuration - reboot the system.
What does that mean? Can I reboot the server through iLO (either Reset or Cold boot) or do I have to wait until the migration completes to finally boot into my OS?
Don't worry to reboot your server e. g. by selecting Reset on iLO. The migration will happen automatically in the background.
I was able to use the storage immediately again after I booted into the OS. The data was still and already available while the migration was still occuring.