Oracle is the most advanced and widely used database of the recent time. Ranging from large industries to entrepreneurs, use Oracle database to store their valuable business transactions in DBF files(Oracle database file). Sometimes, these files get corrupted, denying any access to the valuable data stored in them and for these kind of situations, Oracle Corporation have suggested many useful methods to rectify the database corruption issues in various levels. In case, you fail to resolve the problems and unable to access the database thereof, then, use any Oracle recovery utility to safely recover your seemingly lost data back.
At the time of accessing an Oracle database, you may come across the below error messages:
ORA-01043: user side memory corruption
ORA-01053: user storage address cannot be read
ORA-01073: fatal connection error: unrecognized call type
ORA-01079: Oracle database was not properly created, operation aborted
Form all the above error messages, one thing can be clearly stated that the Oracle database has been damaged or corrupted.
Resolution:
Oracle Corporation has suggested different methods for different kinds of error messages. Below are some of the mostly performed methods:
DBVerify: Use this method to cross check the off-line and the backup data files.
DB_BLOCK_CHECKING: Use this method to set the parameter as 'TRUE' for checking each block of the database for its consistency. However, this method adds around 1% to 10% overhead to the server and ensure that this much overhead is acceptable to you before using the method.
ANALYZE .. VALIDATE STRUCTURE: use this method to cross check each block of the database and move the corrupt rows to the INVALID_ROWS table.
DBMS_REPAIR: You can use this method to check the database for any instance of corruption and repair the same if there is any.
In almost all instances of database problem, with the help of above suggested methods you can be able to resolve the problems. However, if you failed to do so, then, you can opt for any available dbf recovery utility to recover Oracle.
These utilities are developed with read-only properties and do not harm neither the media nor to the data in the process of repairing Oracle. Moreover, with highly interactive graphical user interface, these applications can be easily used even by the non-technical users.
Stellar Phoenix Oracle Recovery is an extremely efficient Oracle recovery software to recover dbf safely. The software supports Oracle 11g, 10g, 9i and works well with Windows server 2003, XP. This wonderful utility is capable of repairing any instance of Oracle database corruption and recover all your database objects from it with ease.
