Call now: 252-767-6166  
Oracle Training Oracle Support Development Oracle Apps

 E-mail Us
 Oracle Articles

 Oracle Training
 Oracle Tips

 Oracle Forum
 Class Catalog

 Remote DBA
 Oracle Tuning
 Emergency 911
 RAC Support
 Apps Support
 Oracle Support

 SQL Tuning

 Oracle UNIX
 Oracle Linux
 Remote s
 Remote plans
 Application Server

 Oracle Forms
 Oracle Portal
 App Upgrades
 SQL Server
 Oracle Concepts
 Software Support

 Remote S


 Consulting Staff
 Consulting Prices
 Help Wanted!


 Oracle Posters
 Oracle Books

 Oracle Scripts

Don Burleson Blog 







ORA-00205: error in identifying controlfile

Oracle Tips by Burleson Consulting
October 23, 2008


I have question regarding 10g control file setting. I have taken over an admin duties on a 10g DB on a windows servers. The database was installed by the previous DBA.  The control file is named file_name.ora is not correct. I've been getting the following ORA message:

"ORA-00205: error in identifying controlfile" 

What is the best way to re-create control file in the correct format and store it in the right place?


The oerr utility show this for the ORA-00205 error:

ORA-00205: error in identifying control file, check alert log for more info

Cause: The system could not find a control file of the specified name and size.

Action: Check that ALL control files are online and that they are the same files that the system created at cold start time.

Your database must be shutdown first. (And probably it is not working right now.)

First of all, create pfile from spfile by issuing this command:

SQL> create pfile from spfile;

Then look under the directory of $ORACLE_HOME\database. You will find a newly created pfile. (Its name is init<SID>.ora) Edit newly created pfile to correct controlfile locations. Then issue the command below:

SQL> create spfile from pfile;

After that, database will see controlfiles. But if you also have changed datafile locations; you have to rename datafiles in mount mode.

If you have lost only one of many control files, the procedure is different.  It is a standard practice to have at least two control file (normally three), so you need to identify the surviving control files and replace the missing one with one of the others.





oracle dba poster

Oracle performance tuning software 
Oracle Linux poster


Burleson is the American Team

Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  and include the URL for the page.


Burleson Consulting

The Oracle of Database Support

Oracle Performance Tuning

Remote DBA Services


Copyright ? 1996 -  2014

All rights reserved by Burleson

Oracle ? is the registered trademark of Oracle Corporation.