How to fix the Oracle error ORA-15205: requested mirror side unavailable?

In this post, you’ll learn more about the Oracle ErrorORA-15205: requested mirror side unavailable with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15205: requested mirror side unavailable

Reason for the Error ORA-15205: requested mirror side unavailable

The requested mirror side of a block is either unallocated or allocated on a disk that has been dropped from the diskgroup.

How to fix the Error ORA-15205: requested mirror side unavailable ?

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

Resubmit the request or try another mirror side.