Are you running current patches for your ONTAP data sources?
Those aggregates don't happen to contain a mix of backend and internal storage, do they? (I'm not even sure there is a situation where that configuration would be allowed in ONTAP; been out of that specialty for a while.)
Yes, we are running the latest patches. And no disks (SSD's) are mixed with the SAS drives. I was wondering -- could this be a case inwhich the "Capacity (GB)" column is reporting Storage Efficiency (dedupe, compression, compaction..)?