| SQL database corruption can occur due to SQL | | | | However, when the user uses sp_attach_single_db |
| Server malfunctioning, virus infection, improper system | | | | Stored Procedures, the user encounters the following |
| shutdown, hardware failure and many more. Once the | | | | error message: |
| MS SQL database gets corrupted, the SQL database | | | | “Server: Msg 5172, Level 16, State 15, Line 1 The |
| become inaccessible. In such situations, use you | | | | header for file path…….mdf is not a valid database |
| backup, if there is no backup, the user needs to repair | | | | file header. The PageAudit property is incorrect.” |
| mdf file by using advanced MDF Repair application. | | | | Cause: |
| Consider a practical scenario, where a user is working | | | | The above error message encounters due to MDF file |
| on SQL Server 2005 and creating a report. While | | | | corruption. The above issue occurs when the MDF file |
| doing so, the Windows restarts due to power failure. | | | | header gets corrupted or some invalid information is |
| When user restart the system, the SQL database | | | | inserted in the header file. All these situations result, |
| becomes inaccessible. When the user tries to attach | | | | inaccessibility of the SQL database. To ensure |
| the MDF manually, he encounters the below error | | | | accessibility of the SQL database, the user needs to |
| message: | | | | recover it by using the latest backup. But sometime |
| “An exception occurred while executing a | | | | user has not created any backup of its database or |
| Transact-SQL statement or batch. _db.mdf is not a | | | | mdf file, then he needs to perform MDF repair. To do |
| primary database file. (Microsoft SQL Server, Error: | | | | so, user needs to use efficient and effective MDF |
| 5171).” Or | | | | repair application. Such mdf file repair applications |
| “C:Program FilesMicrosoft SQL | | | | incorporate advanced and powerful scanning |
| ServerMSSQL.1MSSQLDataMYDATABASE.mdf is | | | | algorithms to repair the corrupted MDF file. The mdf |
| not a primary database file. (Microsoft SQL Server, | | | | recovery software perform systematic scan of |
| Error: 5171)” In such circumstances, the database | | | | corrupted MDF files, repair and restore them in their |
| administrators recommend to attach a single file. | | | | original format without altering any information. |