How to fix the Oracle error ORA-15409: All disks in disk group string are not of the same type.?

In this post, you’ll learn more about the Oracle ErrorORA-15409: All disks in disk group string are not of the same type. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15409: All disks in disk group string are not of the same type.

Reason for the Error ORA-15409: All disks in disk group string are not of the same type.

An attempt was made to add disks of a different type to the disk group under appliance mode.

How to fix the Error ORA-15409: All disks in disk group string are not of the same type. ?

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

Check if all the disks in the disk group are of the same type. Do not add flash and hard disks to the same disk group.