Solving Error 2579 and repairing MDF file in MS SQL Server 2008

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In MS SQL Server 2008 database, the information is stored in pages, which is the most primitive storage unit. These pages have contiguous address and a collection of eight pages constitute an extent, which are used to manage the pages. All such information is stored in a proprietary file called MDF (Master Database File). At times, this MDF file may get corrupt thereby affecting all the database functioning. Such database corruption can be caused due to abrupt or improper system shutdown, hardware malfunctioning, virus infections, power outages, etc. You should try to rectify the problem by using in-house methods. If none of these methods succeed, then you should take the services of a third-party MDF file repair software to repair SQL database.

Take an example, you receive the following error message while working on an MS SQL Server 2008 database:

“Table error: Extent P_ID in object ID O_ID, index ID I_ID, partition ID PN_ID, alloc unit ID A_ID (type TYPE) is beyond the range of this database.”

Cause:

Such behavior occurs when the range of pageinfile of an extent is greater than the size of the database file.

Resolution:

To overcome such erroneous situation, you should try to repair MDF file. This could be done by performing the following methods, preferably in the given order:

Settle hardware issues: First of all, you should check the status of the hardware components by running hardware diagnostics. You should check the error logs to find out hardware related error, if any. If nothing works out, then you can consider reformatting the hard disks and reinstalling the operating system.

Restore from backup: If the hardware components are alright, then you should check the status of the backup. And you should restore the database from its backup if it is clean and updated.

Run DBCC CHECKDB: If the backup method does not solve the problem, then you should run DBCC CHECKDB with the suggested clause. This SQL repair tool will deallocate the extent from the IAM page.

If the error still persists, then you should use a third-party SQL repair software to repair SQL database. These non-destructive MDF repair tools have rich user interface that make SQL repair safe and secure.

Talking of SQL repair tools, Stellar Phoenix SQL Data Recovery is one such tool that repairs SQL database from all instances of logical corruption. This MDF file repair software recovers various database objects such as stored procedures, NDF files, triggers, tables, collations, defaults, etc. Specifically devised to repair MDF files created for MS SQL Server 2008, 2005, 2000, and 7.0, this MS SQL Server repair utility also preserves the relationships among different tables. It is compatible with Windows 7, Vista, Server 2003, XP, and 2000.

I have completed my Ph.D in computer science and currently doing research on how to recover and repair corrupted database. During my research i found many third party software for several database recovery like sql recovery, sql repair, mdf recovery, mdf repair, db2 recovery, oracle recovery and many more. i am sharing my experience and knowledge with you all.


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