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Startup Oracle or mount tablespace with corrupted system datafile.

edited Feb 19, 2025 4:27PM in Database Backup and Recovery (MOSC) 14 commentsAnswered

Oracle 11.2.0.4

We have an environment that we cannot open the database. We do not have any backup.

SQL> alter database open
2 ;
alter database open
*
ERROR at line 1:
ORA-01157: cannot identify/lock data file 6 - see DBWR trace file
ORA-01110: data file 6: 'C:\APP\ORACLE\ORADATA\ORCL\SYSTEM02.DBF'

Can we start the database without system02.dbf? or can we open the data tablespace with any oracle utility in order to retrieve the data?

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