How to fix the Oracle error ORA-15130: diskgroup “string” is being dismounted?

In this post, you’ll learn more about the Oracle ErrorORA-15130: diskgroup “string” is being dismounted with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15130: diskgroup “string” is being dismounted

Reason for the Error ORA-15130: diskgroup “string” is being dismounted

The diskgroup is being dismounted by request or because an I/O error was encountered that could not be handled by taking the disks offline. A disk cannot be offlined whenever doing so could result in all copies of a redundant extent being unavailable.

How to fix the Error ORA-15130: diskgroup “string” is being dismounted ?

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

Repair the hardware problem and re-mount the diskgroup. Refer to the alert log to determine which disks have failed.