Detect Data Block Corruption in Oracle with RMAN

They are always "ORA-01 578 Run-time error when accessing an Oracle database table? If the table is accessed and data is not to use his? This problem usually occurs when the corresponding table contains different blocks damaged. In such cases, Oracle application does not read the table and so we come to this behavior. It leads to severe data loss situations when there is not a valid backup. But in case the backup is not updated, Oracle databaseRecovery is the only way your business-critical data back.

What are the causes of corruption in block Oracle database table?

The block are two types of corruption, namely, logical and physical. Logical corruption can occur due to failure or improper action to recover a database table with NOLOGGING. It can also be caused by viral infection and application failure. While physical damage may be due to system related problems, such as damagedDisks or file system structures.

You can deal with Oracle block corruption using one of the following initialization parameters:

DB_BLOCK_CHECKING-A server process that data blocks checks for internal consistency and integrity.
DB_BLOCK_CHECKSUM-It calculates the checksum for each block before writing to disk.

You can easily see Oracle data block corruption with the help of a built-in utility called RMAN (Oracle Recovery Manager). This tool offers acomprehensive way to backup your database and recover effectively in the event of database corruption. The server should work tools, and recognize block-level corruption when saving the database or restore it.

RMAN detects only the physically damaged data blocks in Oracle database. It does not automatically find the logical corruption of the blocks. You need to check logical block corruption by the "CHECK logical 'Option.

RMAN can not detect in the case, physical corruption to Oracle database and to correct and logical, the database remains accessible. You encounter the same behavior every time you try to open the database table. It causes serious data loss and return you need DBF recovery solutions.

You can quickly and easily remove Oracle database using the most modern and powerful third party applications. They employ high-end scanning methodssystematically scan all corrupt Oracle database tables and extract all data from them. Applications recover Oracle database in a fast, safe and easy way.

Stellar Phoenix Recovery Oracle is the most efficient solution to effectively manage all the DBF file corruption situations. The software successfully restore corrupt databases from Oracle 9i. It provides all the dbf file objects such as tables, table spaces, views, clusters, cluster tables, views, schemas, roles,and indexes.

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