"diskgroup %s 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