Symptoms of Oracle Database Corruption and their solution!

Published by Jacob Martin on March 22, 2014

Oracle database corruption is not always related to “database corrupted” error message. If you are administrator, you can only act on the symptoms that are thrown by database corruption. The symptoms of corruption can be narrowed to a data block, single entry or to a single table. In this blog we will discuss about what errors and system behaviors are symptoms of Oracle database corruption and what is the solution.

Symptoms of Oracle database file corruption

1 – Error viewing data

When you open Oracle database file table and you receive the error “invalid field data type”, this can be a symptoms of database corruption. When you get the error “Oracle database can’t open the table in database” this error is due to a corrupt database. Warning that the database cannot be opened or error like “unrecognized database format” can be due to database corruption or due to any incompatible format of database like trying to open the database by using early version of database software you are using. If you have older version of Oracle then back it up before you move to newer version and then try to open the database.

2 – Maintenance warning sign of database

You can proactively avoid severe problems and error by regularly maintaining and repairing Oracle Database.  When you try to compact the database, you may get error “could not find the field of description” which is probably warning sign of database corruption. If you see error message “Table TempMSysAccessObjects’ already exists” it is confirmed that your Oracle database is corrupt. This error message is reflected because a database object does not follow the data naming rules. In this case you can verify the naming convention before you presume to find the corruption cause within database.

3 – Deletion notices that give rise to database corruption

If the Oracle database throws the message that the record is deleted, but actually it is not, then the database may be corrupted. If you find the message that changes not made successfully, it may be due to they would have created duplicate value in the primary or index key and the given command does not work then it is confirmed that database ids corrupted . This is another symptom of database corruption.

4 – Errors of corrupt Oracle database

If you get error such as “ORA-00600”, ORA_11576: ORACLE data block corrupted” then it is sure that data block of your Oracle database is corrupt. You can repair and recover corrupted block with the help of inbuilt Recover block command. But this command only repair the data block corruption physically and not logically. Hence it is a clear indication that your Oracle database is corrupt.

Solution

Above mentioned are the symptoms of Oracle database which confirm that it is corrupted. So, if you are a user of Oracle database or if you are administrator handling the Oracle database file and any of the above symptoms you notice then make your mind that your Database is corrupt and you will require repairing and recovering it. To recover corrupt Oracle database file you will require the Professional third party Oracle file repair tool. Such tool is specifically built for detecting, repairing and recovering the corrupted database file. The software comes with user friendly interface, hence there will be no difficulty to operate it. Oracle file repair tool is compatible with Windows 7, Vista, XP, 2008, 2003 and 2000

Tips to minimize Database Corruption

1 – Block further database entries while they are being edited to prevent the database corruption.

2 – Save Oracle database on regular basis and create a backup at least at two different places. By doing this you can easily get the recent data from the backup you have created and saved.

3 – Database administrators should check the error logs to find corruption early so that they can fix them in early stage and avoiding the problem to grow and corrupt entire database.

How to repair corrupt Orcale database

Step 1: Search Initial screen of Stellar Phoenix Oracle Recovery with a pop-up window showing options to select or search corrupt Oracle databases in your computer.

Step 2: Click Scan File to initiate the scan process after selecting the oracle database. The recoverable database objects get listed in left-side pane.

Step 3: Click an object to see its preview.

Step 4: : Click Start Repair in the icon bar to start the repair process. A pop-up window is displayed which show the steps needed to perform further. Click next and continue.

Step 5: Give the user name, password and path of the blank database where you want to save the repaired database objects.

Step 6: Repairing and restoring various database objects after establishing a connection with blank oracle database.

424 Total Views 2 Views Today