Rebuild system databases.īefore performing Rebuild system databases, make sure that you have the latest backup of the master, model and msdb databases. Or you can try the third way, which is a longer but definitive solution. If you cannot succeed, you can restore the master database to another instance in the same version and copy the files. You cannot start the sql server service without a master database.įirst of all, you can start instance in single user mode and try to restore the master database from the cmd command line. OS error: 2(The system cannot find the path specified.) Therefore, the sql server service cannot start because it cannot find the log file of the master database.įCB::Open failed: Could not open file C:\Program Files\Microsoft SQL Server\MSSQL12.TESTINSTANCE\MSSQL\DATA\mastlog.ldf for file number 2. In my example, the log file of the master database has been deleted. You can see the related error on the right side after clicking on Application under the windows logs as below. In Windows Search, we open the Event viewer as follows. Consult the event log or other applicable error logs for details. The request failed or the service did not respond in a timely fashion. This error only says that the service is not responding and we need to look at the event log.
This error does not always mean that your database is corrupted. In the article “ SQL Server Configuration Manager Settings“, you can access the article that explains the settings that can be made through Configuration Manager.ĭo not panic. When you want to start the SQL Server service from SQL Server Configuration Manager, you will see an error as follows. The need to restore the master database usually begins with the failure to open the sql server service as a result of a corruption in the master database. You can get detailed information about system databases in my article “ SQL Server System Databases” So how do we restore the master database when it is corrupted? Therefore, you should regularly back up the master database and other system databases. Therefore, without a master database, a sql server instance does not work. For example, logins, endpoints, linked servers, system configuration settings. Master database is a database that keeps all the information at the system level in an instance.
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