How to fix the Oracle error ORA-01232: cannot start online backup – file string is being made read-only?

In this post, you’ll learn more about the Oracle ErrorORA-01232: cannot start online backup – file string is being made read-only with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01232: cannot start online backup – file string is being made read-only

Reason for the Error ORA-01232: cannot start online backup – file string is being made read-only

An attempt to start an online backup found that one of the files is in transition to read-only mode.

How to fix the Error ORA-01232: cannot start online backup – file string is being made read-only ?

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

Wait for the transition to complete and then retry the command, if this is an ALTER DATABASE BEGIN BACKUP command, or take the backup without any begin or end commands, if this is an ALTER TABLESPACE BEGIN BACKUP command.