If you have encountered the error message “The Log Scan Number Passed to Log Scan in Database ‘master’ is not Valid” while trying to start your SQL Server service, don’t worry. In this blog post, we will discuss how to fix this error and get your SQL Server up and running again.
The error message usually indicates that there is a problem with the master database, which is a system database in SQL Server. The master database contains crucial information about the SQL Server instance and its configuration. When the master database is corrupt or inaccessible, it prevents the SQL Server service from starting.
Here is a step-by-step guide to fix this error:
Step 1: Rebuild the Master Database
To rebuild the master database, you need to run the following command:
setup.exe /QUIET /ACTION=REBUILDDATABASE /INSTANCENAME=MSSQLSERVER /SQLSYSADMINACCOUNTS= /SAPWDReplace “MSSQLSERVER” with the instance name of your SQL Server installation. If you have a default instance, the instance name should be “MSSQLSERVER”. Otherwise, use the appropriate instance name.
It’s important to note that rebuilding the master database will also rebuild other system databases like msdb and model. Therefore, it’s recommended to take a backup of the MDF and LDF files of those databases before proceeding with the rebuild. You can replace them back once the rebuild is complete.
Step 2: Restore the Master Database
After rebuilding the master database, you need to restore it using a backup. Follow these steps:
- Start SQL Server in single user mode by adding the “-m” parameter.
- Use the following T-SQL query to restore the master database:
RESTORE DATABASE master FROM disk='C:\backup\master.bak' WITH REPLACEMake sure to replace “C:\backup\master.bak” with the actual path and filename of your master database backup.
Once you have completed the rebuild and restore process, you should be able to bring the SQL Server resource online successfully.
It’s always recommended to have regular backups of your databases, including the system databases like master. Having a backup can greatly simplify the recovery process in case of any issues or errors.
We hope this guide has helped you resolve the “The Log Scan Number Passed to Log Scan in Database ‘master’ is not Valid” error in SQL Server. If you have any further questions or need assistance, feel free to leave a comment below.