Restoring Master, Model and MSDB from Netbackup
Restoring System Databases got two parts: Taking the instance in single user mode and Restoring the Master Database If you need to rebuild the system databases on top of this you can use the below command: "C:\Program Files\Microsoft SQL Server\ 100 \Setup Bootstrap\ SQLServer2008R2 \setup.exe" /ACTION=REBUILDDATABASE /INSTANCENAME=SQL008 /SQLSYSADMINACCOUNTS=domain\ServiceUserName /SAPWD="yourpasswordOfSAuser" /SQLCOLLATION="Latin1_General_CI_AS" here 100 is for SQL Server 2008R2. It can vary case by case. How to take instance to single user mode: Two situation can happen: 1. Standalone Instance 2. Failover Cluster Instance 1. Standalone Instance: Go to SQL Config Manager SQL Service Properties -> Advanced Properties -> Startup Parameters put -m; in the Startup Parameters Apply and Okay - it will ask to restart the SQL Service to take effect. Stop and Start the service from Config Manager or you can stop and serv