Oracle 9i is a version of the Oracle database wherein the 'i' denotes 'Internet', which means that Oracle 9i is 'Internet Ready'. Because of this characteristic, the Oracle 9i databases provide excellent base for the OLTP (online transaction processing) applications as these are efficient, reliable, and provide secure data management. In addition, this new generation database engine provides the capability to read and write XML statements. All the data is stored in a datafile called a DBF file. Although it is a very secure and robust database system, it may sometimes get corrupt due to various reasons such as file system corruption, media block corruption, operating system corruption, etc. In such scenarios, you should use in-built database repair methods to recover DBF file. If you are not able to fix the problem, then you should use a third-party Oracle recovery software to do the needful.
Consider a scenario wherein you get the following error messages while working on an Oracle 9i database:
ORA-01073: fatal connection error: unrecognized call type
ORA-01079: Oracle database was not properly created, operation aborted
ORA-01099: cannot mount database in SHARED mode if started in single process mode
ORA-01043: user side memory corruption
ORA-01053: user storage address cannot be read
Cause
The root cause of the aforementioned error messages is that the DBF file may have got corrupt due to the reasons discussed in the introductory paragraph.
Resolution
To resolve these errors, you should perform several of the repair methods to repair dbf database. They are:
DBVerify: It is used to validate the offline and backup datafiles.
ANALYZE.. VALIDATE STRUCTURE: It is used to verify every data block in the analyzed object.
DB_BLOCK_CHECKING: It is used to check the consistency of the data block.
DBMS_REPAIR: It is used to detect and repair the corruption in the data block.
However, if you are not able to solve the problem even after performing the aforementioned methods then you should use a third-party dbf database repair software. Such read-only tools are able to recover Oracle database without overwriting the original database.
Stellar Phoenix Oracle Database Recovery is a DBF recovery software that is able to repair database from all instances of corruption. It is specifically designed to recover Oracle database created in Oracle 9i. This dbf recovery software is able to various Oracle database components such as tables, views, table spaces, cluster tables, schemas, synonyms, roles, indexes, and sequences. In addition, this oracle recovery tool is able to preserve primary and foreign keys associated with the database tables. It is compatible with Windows Server 2003 and XP.
Anurita Singh work as a freelancer and researcher oracle database repair & repair oracle database software.
Article Source: http://EzineArticles.com/?expert=Anurita_Singh
