Expansion Shelf Aggregate Offline with "UUID is not valid" Error After DC Power Cycle
Hey everyone, looking for some guidance after an unexpected data center shutdown over the weekend. Our controller is running ONTAP 9 and is connected to a DS2246 expansion shelf. All the physical link lights on the shelf are green, and I can reach the IP of the share, but I can't access any folders inside.
Digging into the CLI, the underlying data volumes are offline. Attempting `volume online` errors out because the parent aggregate is offline. When I try to bring the aggregate online via `storage aggregate online`, I get a `uuid is not valid error`. It looks like a metadata or disk signature mismatch occurred during the dirty reboot, and ONTAP isn't recognizing the aggregate's UUID on the shelf drives. Has anyone run into this specific error after a hard power cycle? What are the safest steps to re-import or force-mount the aggregate without risking data loss?