I see that DMC is unable to give the right volume usage for a particular partition. It is showing wrong partition value in every instance for that particular partition name.
Any specific permission that needs to be checked or how can this be fixed ?
Can you try running below command and check which partitions are listed:
| rest splunk_server=localhost.localdomain /services/server/status/partitions-space
Getting the same thing, in fact that is the same query being used in the monitoring console,