How to fix the Oracle error KFNDG-00405: specified disk group string appears to be mounted?

In this post, you’ll learn more about the Oracle ErrorKFNDG-00405: specified disk group string appears to be mounted with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

KFNDG-00405: specified disk group string appears to be mounted

Reason for the Error KFNDG-00405: specified disk group string appears to be mounted

Disk group was mounted.

How to fix the Error KFNDG-00405: specified disk group string appears to be mounted ?

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

Unmount the disk group and retry renamedg.