System Table Corruption Causes Data Loss In Sql Server

Microsoft SQL Server is a reliable and advanced database management system that provides

you various database management and SQL database recovery algorithms. DBCC CHECKDB is one of the most advanced SQL Server commands that helps you repair corrupt database. However under some situations, this command fails with an error and cannot repair damaged database. This behavior leads to critical data loss and requires SQL Server recovery to be fixed.

DBCC CHECKDB command may not recover SQL Server database due to various reasons, such as metadata structure corruption, system table damage, and faulty database index. For instance, consider the following error message that occurs when you try to perform MS SQL recovery using DBCC CHECKDB command-

Database MyDB: Check Data and Index Linkage...

[Microsoft SQL-DMO (ODBC SQLState: 42000)] Error 8921: [Microsoft][ODBC SQL Server Driver][SQL Server]CHECKTABLE terminated. A failure was detected while collecting facts. Possibly tempdb out of space or a system table is corrupt. Check previous errors.

[Microsoft][ODBC SQL Server Driver][SQL Server]CHECKDB found 0 allocation errors and 1 consistency errors not associated with any single object.

[Microsoft][ODBC SQL Server Driver][SQL Server]CHECKDB found 0 allocation errors and 1 consistency errors in database 'MyDB'.

[Microsoft][ODBC SQL Server Driver][SQL Server]repair_fast is the minimum repair level for the errors found by DBCC CHECKDB (MyDB ).

The above error occurs with every parameter of DBCC CHECKDB command, including REPAIR_FAST.

Since the database remains corrupt due to DBCC CHECKDB failure, its records also remain inaccessible.

Cause:

You may encounter this problem if SQL Server database or MDF file has severe logical corruption. DBCC CHECKDB command cannot handle serious corruption and perform MDF recovery.

Solution:

In order to sort out this problem and extract your precious data from inaccessible data, go through the below SQL recovery steps-

Restore MDF file from an updated and valid backup.

If backup is not current, use commercial MS SQL repair software to ensure absolute MDF file recovery.

Such efficient SQL database recovery applications are particularly designed to repair MDF file using advanced SQL recovery algorithms. The MDF recovery software do not demand sound technical skills to repair SQL database as of their interactive MS SQL recovery user interface.

You need not to worry about integrity of your database as MS SQL recovery applications perform safe recovery with read-only conduct. You can use free demo version of these applications to check out their features and functionalities.

Stellar Phoenix SQL Recovery software helps you perform SQL Database recovery for Microsoft SQL Server 2008, 2005, 2000, and 7.0.

by: mark willium

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