How to fix the Oracle error ORA-15281: not all specified disks were brought ONLINE?

In this post, you’ll learn more about the Oracle ErrorORA-15281: not all specified disks were brought ONLINE with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15281: not all specified disks were brought ONLINE

Reason for the Error ORA-15281: not all specified disks were brought ONLINE

Some of the disks specified either experienced I/O errors while being brought ONLINE, or were simultaneously brought OFFLINE or dropped in another session, or were full.

How to fix the Error ORA-15281: not all specified disks were brought ONLINE ?

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

Query V$ASM_DISK or use ASMCMD LSDSK to determine which disks were not brought ONLINE. Inspect any additional error messages and the alert log to determine the exact cause. If some of the disks failed, either fix the cause of the failures or drop the disks. If some of the disks are full, either free space in the disk group or add new disks to the diskgroup.