How to fix the Oracle error ORA-15289: ASM disk string cannot be resized beyond string M?

In this post, you’ll learn more about the Oracle ErrorORA-15289: ASM disk string cannot be resized beyond string M with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15289: ASM disk string cannot be resized beyond string M

Reason for the Error ORA-15289: ASM disk string cannot be resized beyond string M

A resize disk command specified a size beyond the maximum allowed for this disk.

How to fix the Error ORA-15289: ASM disk string cannot be resized beyond string M ?

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

Check alert logs from all ASM instances to identify the reason for the size limitation. If there are any 10g database instances using this disk group, shut down those instances and retry the resize operation.