It’s no doubt that MS SQL provides efficient database management but it is also true that sometimes your data gets corrupted due to alteration or damage in database. Due to corruption you are not allowed to access the database and are unable to work further. The corruption of database leads to the occurrence of numerous errors and unless you fix those errors accessibility is blocked. The errors generally occur in MS SQL database due to some arbitrary reasons. Some of the major reasons are as follows:

• Improper shutdown of system
• Power failure
• Page header corruption
• Virus infections
• Damaged hardware components

Above mentioned instances give result to corruption of database and you start getting errors. For example, the below cited error occurs when you are working on your MS SQL server database.

Table error: alloc unit ID A_ID, page P_ID. The test (TEST) failed. The values are VAL1 and VAL2.

The reason behind this error is Page Header corruption. Due to corruption problem occurs to database page P_ID and it has not passed auditing test. Sometimes it also shows an error message like TEST string has failed the test.

Resolution of the error

In such situation you should do MDF file repair in order to address the issue. It can be done by verifying the hardware components. You can do it by following ways:

• Verify the hardware related errors by checking the SQL Server error logs
• Exchange the hardware components to narrow down the error
• If disk controller has enabled write-disk cashing then take the help of hardware vendor to solve the issue
• You can also format hard drive and reinstall new OS to get an error free system

If you don’t found any error in your hardware components then should check the state of database backup and replace it with backup. Now you will not found the error any more. Nevertheless, sometimes database are damage to such an extent that they are not repaired by these methods. In that situation you can repair Page Header corruption with the help of MS SQL Database Repair Software. It ensures safe recovery of database without doing any type of overwriting. It is compatible with MS SQL server 7.0, 2000, 2005 and 2008. It can also repairs database objects like collations, triggers, tables, NDF files and stored procedures etc