How to fix the Oracle error ORA-15201: disk string contains a valid RDBMS file?

In this post, you’ll learn more about the Oracle ErrorORA-15201: disk string contains a valid RDBMS file with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15201: disk string contains a valid RDBMS file

Reason for the Error ORA-15201: disk string contains a valid RDBMS file

A disk specified in a CREATE DISKGROUP or ALTER DISKGROUP … ADD DISK command appeared to contain a file from an existing database. By default, ASM will not allow a diskgroup to be created using this disk, as a safeguard against damaging an existing database.

How to fix the Error ORA-15201: disk string contains a valid RDBMS file ?

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

Check that the ASM disk specification is correct. Otherwise, when storage from a defunct database is reused as part of an ASM diskgroup, specify the FORCE option to the ASM SQL command.