

The DBCC CHECKDB command is a built-in command created by Microsoft to analyze the consistency of the SQL database. You can use the command to find offsets, indexes, pointers, mapping tables, and so on. To get database error 8921, the user must use the DBCC CHECKDB command. Sometimes you can find damaged MDF files, but don't worry, you can easily repair damaged MDF files in SQL Server.
For More: Fix SQL Database Error 8921





