Tips to Avert and Resolve Oracle Database Corruption
Consider a practical case, where you, as a database administrator, perform below steps:
1.You copy your database file when your database is alive.
2.Then, you update the table stored in the data file.
3.After this, you shutdown the database using 'shutdown immediate' command and change the datafile with its 'alive' copy.
After this, when you try to mount your Oracle database, it does not mount.
Cause:
The
fundamental reason for unmountability of the database is corruption in
datafile. To prevent the corruption of datafile, you should never
follow the above steps sequentially.
Resolution:
To
resolve datafile corruption and to mount your Oracle database, it is
advisable to restore the database from a standby database. However, if
no such database exists, then you will need to repair the database. To
effectively do so, you will need to search for a commercial dbf recovery application that can repair your corrupted database.
A
repair tool to recover Oracle database and to bring it back to a
reusable state can be easily downloaded from the Internet. Such tools
can Recover Oracle Database after any logical corruption scenario using
powerful recovery algorithms. Moreover, these tools do not make any
change in the original database, making them completely non-destructive
in nature.
Oracle Recovery Software is a utility used by most of the Oracle database administrators to recover Oracle database after all kinds of logical crashes. The tool supports recovery of Oracle 9i databases. Designed for Windows XP and 2003, the read only software leaves the original database untouched and unmodified.
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