How to fix the Oracle error ORA-01191: file string is already offline – cannot do a normal offline?

In this post, you’ll learn more about the Oracle ErrorORA-01191: file string is already offline – cannot do a normal offline with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01191: file string is already offline – cannot do a normal offline

Reason for the Error ORA-01191: file string is already offline – cannot do a normal offline

When attempting to do a normal tablespace offline it was discovered that one of the files in the tablespace was already offline.

How to fix the Error ORA-01191: file string is already offline – cannot do a normal offline ?

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

Either bring the datafile online first, or use another tablespace offline option.