The main reasons behind why the SQL database goes to suspect mode when the primary filegroup has been damaged and the SQL database cannot be recovered during the startup of SQL Server. There are other reasons as well: Due to corruption occurs in the log file or primary file. Improper shutdown of SQL Server. When the SQL Server is unable to complete the roll forward or roll backward operation. Note: If you are facing a Suspect Database problem then the user can use SQL recovery software to repair corrupted SQL database easily.