ORA-15074: diskgroup string requires rebalance completion

Cause: An attempt was made to repeatedly add or drop disks from a diskgroup. ASM could not perform the operation given the current state of the diskgroup.

Action: Manually invoke the ALTER DISKGROUP REBALANCE command and allow the rebalance to run to completion. Alternatively, invoke the ALTER DISKGROUP UNDROP DISKS command and allow the rebalance to run to completion. After the rebalance has completed, retry the operation.

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