How to fix the Oracle error CLSR-01004: Failed to mount database?

In this post, you’ll learn more about the Oracle ErrorCLSR-01004: Failed to mount database with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

CLSR-01004: Failed to mount database

Reason for the Error CLSR-01004: Failed to mount database

Database cannot be mounted by an instance.

How to fix the Error CLSR-01004: Failed to mount database ?

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

Check alert log for error detail.

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