How to fix the Oracle error ORA-15074: diskgroup string requires rebalance completion?

In this post, you’ll learn more about the Oracle ErrorORA-15074: diskgroup string requires rebalance completion with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15074: diskgroup string requires rebalance completion

Reason for the Error ORA-15074: diskgroup string requires rebalance completion

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.

How to fix the Error ORA-15074: diskgroup string requires rebalance completion ?

You can fix this error in Oracle by following the below steps

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.