After executing the above command, remove prefix (-m) parameter and start SQL Server.Ī user can use this method to fix the SQL Server master database corruption problem without any hassle. RESTORE DATABASE master FROM DISK = ‘D:\Backupfolder\master.bak’ WITH REPLACE Now, to restore the master database, run the following command:. Start the SQL Server and open cmd.exe from the Start menu. Now, to restore master.mdf file, follow the given steps. Then, start the SQL Server in single user mode. Now, go to the Startup Parameters option and add -m prefix before already existing parameters. In the Properties window, click on Advanced tab to open it. Now, right-click on it and select Properties. After that, a user needs to choose SQL Server instance. First of all, open SQL Server Configuration Manager and choose SQL Server 2005 Services option. Moreover, before you begin, please start SQL Server in single user mode. In order to restore the master database from backup, a user must have a complete backup of master.mdf file. Users can choose any of these according to their choice. In this segment of the article, different solutions to overcome master database corruption are discussed. How to Fix SQL Server Master Database Corruption Moreover, if a master database is suffering from a minor level of corruption, a user can start the database but is not allowed to access the details stored in the database. However, to fix the issue, a user needs to rebuild master.mdf using command prompt. If the level of corruption is really high in master.mdf file, then SQL Server will not get started. Therefore, it is always suggested to take backup of the master database on a regular basis to have permanent access to the SQL Server. Master database corruption in SQL Server is a common problem faced by users. 
However, if SQL Server master database gets corrupted due to some reason, the system database will not start with the user database. This database is stored at a default location, with a small size.
Moreover, the master database is stored in a physical file known as master.mdf, and transaction log file corresponding to the master file is named as masterlog.ldf file. All these system databases, along with the master database, create system tables, which record all the Server parameters and detailed information about every database and user.
Whenever a user installs the SQL Server, it creates master, MSDB, model, and TEMPDB system database by default.
It stores all the primary configuration details of the SQL Server. The SQL server has no meaning without the master database, and a user is unable to access SQL database without it. The master database is the most important database in the SQL Server.
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