How to fix the error ORA-00220: control file not mounted by first instance, check alert log for more info?

In this post, you’ll learn more about the Oracle ErrorORA-00220: control file not mounted by first instance, check alert log for more info with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-00220: control file not mounted by first instance, check alert log for more info

Reason for the Error ORA-00220: control file not mounted by first instance, check alert log for more info

The specified control file has a different mount ID than the other control files that are being mounted. This means that the first instance to mount the database did not use this control file.

How to fix the Error ORA-00220: control file not mounted by first instance, check alert log for more info ?

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

Find and install the correct control file.