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.

About Mehmet Salih Deveci

I am Founder of SysDBASoft IT and IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience.I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource.I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks.I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients.If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress [email protected].-                                                                                                                                                                                                                                                 -Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  [email protected] a mail atabilirsiniz.

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