How to fix the Oracle error ORA-15040: diskgroup is incomplete?

In this post, you’ll learn more about the Oracle ErrorORA-15040: diskgroup is incomplete with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15040: diskgroup is incomplete

Reason for the Error ORA-15040: diskgroup is incomplete

Some of the disks comprising a diskgroup were not present.

How to fix the Error ORA-15040: diskgroup is incomplete ?

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

Check the hardware to ensure that all disks are functional. Also check that the setting of the ASM_DISKSTRING initialization parameter has not changed. Alternatively, for normal or high redundancy diskgroups, use MOUNT FORCE to offline missing disks as part of mounting the diskgroup.

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