Sometimes you can get ” ORA-00205: error in identifying control file check alert log for more info ” error.
ORA-00205: error in identifying control file check alert log
Details of error are as follows.
SQL> startup
ORACLE instance started.
Total System Global Area 755769344 bytes
Fixed Size 2217184 bytes
Variable Size 478153504 bytes
Database Buffers 272629760 bytes
Redo Buffers 2768896 bytes
ORA-00205: error in identifying control file, check alert log for more info
ORA-00205: error in identifying control file, check alert log for more info
error in identifying control file
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
ORA-00205
Check the control_files parameter.
SQL> show parameter control_files
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
control_files string /u01/app/oracle/oradata/MSDB/co
ntrol01.ctl, /u01/app/oracle/o
radata/MSDB/control02.ctl
Check the controlfiles if they are exist or not in the related locations.
[oracle@msdbadm01 ~]$ ls -ltr /u01/app/oracle/oradata/MSDB/control01.ctl -rw-r-----. 1 oracle oinstall 9748480 Jun 24 03:37 /u01/app/oracle/oradata/MSDB/control01.ctl [oracle@msdbadm01 ~]$ ls -ltr /u01/app/oracle/oradata/MSDB/control02.ctl ls: cannot access /u01/app/oracle/oradata/MSDB/control02.ctl: No such file or directory
control01.ctl exist but control02.ctl doesn’t exist.
Modify the control_files parameter as follows.
SQL> alter system set control_files='/u01/app/oracle/oradata/MSDB/control01.ctl' scope=spfile; System altered.
Shutdown database.
SQL> shut immediate; ORA-01507: database not mounted ORACLE instance shut down.
Then startup database again.
SQL> startup ORACLE instance started. Total System Global Area 755769344 bytes Fixed Size 2217184 bytes Variable Size 478153504 bytes Database Buffers 272629760 bytes Redo Buffers 2768896 bytes Database mounted. Database opened.
Database has been opened, so problem has been solved.
You can multiplex Controlfile with the following article.
Do you want to learn Oracle Database for Beginners, then Click and read the following articles.
Oracle Database Tutorials for Beginners ( Junior Oracle DBA )