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Note: If you do not remove the "READ-ONLY" attribute from the database and log file of the MSSQL Server, the SQL services will not start.Ĩ. Before starting the MSSQL Server service remove the "READ-ONLY" attribute from the master database and log files (Figures 7 & 8) Change master$4idr to master.mdf as shown (Figure 5)ħ. Rename the corrupted master database and log files to ".old" as shown (Figure 4)ĥ. With every full backup of a MSSQL Server or instance the following files get created (Figure 3)Ĥ. Go to the data folder under MSSQL (Figure 2)ģ. Go to the MSSQL folder on the Server where SQL is installed (Figure 1)Ģ. How to replace the corrupt or missing master database and log files with the copies of the master database and log files:ġ. Rebuild Master utility or reinstalling SQL to be able to restart SQL, you can replace the corrupt or missing databases with the copies of the master and model databases that Backup Exec automatically creates and updates whenever backups of those databases are run. If the master database is critically damaged and SQL cannot be started, rather than running the Restore Job Properties for SQL dialog box and then restore any other databases, if required. If you can still start SQL, you can restore the latest copy of the master database backup using theĪutomate master database restore option in the Backup Exec

A report generated by the SQL Database Consistency Checker utility (DBCC) Segmentation faults or input/output errorsģ.

If the master database is damaged, symptoms may include:Ģ.