A filegroup in MS SQL Server database is mainly a logical storage unit that saves database components, which map to multiple or a single file. Corruption in file groups can occur due to various reasons like improper system shutdown, application malfunction, metadata structure damage, virus infection, and more. In most of these situations, the database becomes unmountable and its records become inaccessible. An easy alternative to get past such SQL database corruption scenarios is by executing DBCC CHECKDB command. The command although successful in resolving all corruption scenarios can also fail in certain situations. These situations force the user to replace corrupt database with a valid and complete database backup. However, in case of unavailability of a valid database backup, you will need to opt for an effective MDF File Repair application.

To illustrate the above case, consider a real-time scenario wherein you receive the below error message while trying to mount your SQL Server database:

“Unable to process index I_NAME of table O_NAME because filegroup F_NAME is invalid.”

This a severity level 16 error message. This message makes the database unmountable and all the records saved in it inaccessible.

Cause:

The above error message appears when the filegroup saved in the metadata structure of an index gets corrupted or does not exist. In such situations, the index can not be checked and the database can not be mounted. The error message can appear either due to logical or physical damage.

Resolution:

To get past the above issue, follow the underneath guidelines:

In case of damage done due to a hardware damage, you will need to change the damaged system component. To identify the damaged system component, check the system and application logs. In case logical crash becoming the reason for MDF file damage, the user needs to use commercial MDF File Repair application. MDF Repair tools use effective repair techniques to repair logically damaged database and bring the database back in mountable state. The application is easy to understand and needs no prior technical knowledge.

Stellar Phoenix SQL Recovery repairs MDF files after logical damages caused due to application malfunction, virus attack, and some other similar reason. The non-destructive MDF Recovery tool keeps the original MDF file intact and does not make any change in the original file. Supported by MS SQL Server 2008, 2005, and 2000, the tool can be installed on Windows 7, Vista, 2008, XP, 2003, and 2000.