In this post, you’ll learn more about the Oracle ErrorORA-15284: ASM terminated ALTER DISKGROUP ONLINE with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-15284: ASM terminated ALTER DISKGROUP ONLINE
Reason for the Error ORA-15284: ASM terminated ALTER DISKGROUP ONLINE
None of the disks specified by ALTER DISKGROUP ONLINE could be brought ONLINE.
How to fix the Error ORA-15284: ASM terminated ALTER DISKGROUP ONLINE ?
You can fix this error in Oracle by following the below steps
Inspect additional error messages and the alert log to determine why the specified disks cannot be brought ONLINE.