Resolve SQL Error 9004

Microsoft SQL Server is RDBMS or Relational Database Management System that efficiently and flawlessly manages large volumes of data where one can insert, update or delete data that gets stored in tables in databases. However, due to some reasons the SQL database gets corrupt which leads to the inaccessibility to all the data stored in the database. One encounters a number of error messages. Are you getting an error message like the following?

“Error: 9004, Severity: 21, State: 1. An error occurred while processing the log for database 'mydb'. If possible, restore from backup. If a backup is not available, it might be necessary to rebuild the log.”

Corruption to the MDF file is one of the major reasons for the occurrence of the error, however, there are other reasons too. The most common reasons for the occurrence of the error are as follows:

Outdated device drivers.

File headers that are damaged.

Hardware problems.

Defect in the SQL engine

Virus infection.


To resolve the issue one needs to perform the steps given below:

If you have kept an updated or clean backup of the data stored in the databases then you can restore the data from there. But if the backup cannot be used for restoring the data then follow the step mentioned below.

Create a new database to rebuild the log by using the Create Database for Attach_Rebuild_Log command.

Use the DBCC CHECKDB REPAIR_ALLOW_DATA-LOSS command to repair the damaged database and restore it into its original form.


However, if the error is not fixed with the help of all the aforementioned steps then you need to use a reliable and efficient third party SQL recovery tool that can recover and restore the inaccessible data and repair sql database . These make use of strong scanning algorithms and scan the entire system to remove any reasons that may have led to the occurrence of the error.