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NID-00120: Database should be mounted exclusively


Sometimes You can get “NID-00120: Database should be mounted exclusively ” error.


Details of error are as follows.

NID-00120: Database should be mounted exclusively
Cause: The database was started in parallel mode. To change the DBID, the database must be mounted exclusively.
Action: Shut down the database and start it in exclusive mode.
NID00120: Database should be mounted exclusively
Change of database name failed during validation database is intact.
DBNEWID Completed with validation errors.



This error is related with the cluster_database parameter, When this parameter’s value is TRUE, you can get this error.

SQL> show parameter cluster

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

cluster_database                     boolean     TRUE
Set this parameter to False, then restart database.
shutdown immediate;

startup mount;


Run nid tool again using the following post.

Oracle Database Name Change Using NID



Do you want to learn Oracle Database for Beginners, then read the following articles.

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