How to fix the Oracle error ORA-15235: diskgroup string mount mode conflicts with existing mount?

In this post, you’ll learn more about the Oracle ErrorORA-15235: diskgroup string mount mode conflicts with existing mount with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15235: diskgroup string mount mode conflicts with existing mount

Reason for the Error ORA-15235: diskgroup string mount mode conflicts with existing mount

The mode specified in the diskgroup mount command conflicted with the mode in which it was mounted on some other instance.

How to fix the Error ORA-15235: diskgroup string mount mode conflicts with existing mount ?

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

Specify a compatible mode in the diskgroup mount command.