Monthly Archives May 2013

Undo tablespace datafile has been corrupted with active rollback segments

by Snehashish Ghosh


 Undo Tablespace has been corrupted with active rollback segment present in undo tablespace. 


Issue Identification

 The database has been started using services.msc

 But after logging into the database as sysdba privilege and issue of a command with dba_data_files and subsequent database status checking reveals that database has not been opened and is in mount state.

 Shutdown immediate and startup from the command prompt throws the following error:

SQL> shutdown immediate;

ORA-01109: database not open

Database dismounted.

ORACLE instance shut down.

SQL> startup;

ORACLE instance started.

Total System Global Area 1071333376 bytes

Fixed Size                  1375792 bytes

Variable Size             629146064 bytes

Database Buffers       ...

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