How to fix the Oracle error ORA-15410: Disks in disk group string do not have equal size.?

In this post, you’ll learn more about the Oracle ErrorORA-15410: Disks in disk group string do not have equal size. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15410: Disks in disk group string do not have equal size.

Reason for the Error ORA-15410: Disks in disk group string do not have equal size.

The disks in the disk group were not of equal size.

How to fix the Error ORA-15410: Disks in disk group string do not have equal size. ?

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

Ensure that all disks in the disk group are of equal size. If adding new disks to the disk group, their size must be equal to the size of the existing disks in the disk group. If resizing, all disks in the disk group must be resized to the same size.