MDF corruption and its recovery

Computers & TechnologyTechnology

  • Author David Andrews
  • Published January 2, 2012
  • Word count 459

Microsoft SQL Server is a relational database which stores and retrieves data as per the need of other software applications. This software allows the access of various application programs either running on the same computer or on another across the same network. It is relational webhosting database which stores website information like blog posts or user information. It is one of the most popular databases on Windows servers and is highly suitable for several business purposes.

MS SQL stores all the data and information in MDF file format which holds the relevant data of user information and website details. These files contain all important data of any organization and perform various critical operations. It becomes very disgusting if these MDF files get corrupted or damaged somehow. As every software has the tendency to get corrupted or damaged, these MDF files never let any assurance not to corrupt. In the case of SQL corruption, the users need not to be worried as there are such tools available which can perform MS SQL recovery very efficiently.

There are various predictable and unpredictable causes that affect the MS SQL database and make the MDF files corrupted resulting in a situation of data loss. The reasons that cause SQL damage are summarized below:

1.Corrupted/deleted LDF log file

2.I/O errors

3.Corruption in the MDF file of SQL database Server

4.SQL Database in "suspected" mode

5.Deletion of items (like tables, system objects, records etc)

6.Virus attack or power failure

7.Bad sector in storage media

8.Maximization of the storage space of SQL database

When there is a corruption in the MDF files, users face numerous errors while opening the database. Some common error messages are easily encountered when a corrupted/ damaged MS SQL file is opened. Some errors can appear prompting on your screen. Some of these are:

1.Server can't find the requested database table

2.The process could not execute 'sp_replcmds' on server

3.The file *.mdf is missing and needs to restore

4.Internal error. buffer provided to read column value is too small

5.Table Corrupt

6.File: , line=466 Failed Assertion = '0'

7.Table error: Object ID 0, index ID 0, and page ID (1:105). The PageId in the page header = (0:0)

8.Conflict occurred in database‘db_name’, table 'table_name', column 'column_name'

Once your MS SQL database corrupts, you need to search an effective software utility that can recover the MDF files and retrieve data from the corrupt/ damaged database. The MS SQL recovery software should be capable of recovering all lost/ damaged tables, triggers, stored procedures, data structures like primary keys, indices, unique keys, foreign keys, predefined defaults and other user data types. Further, the repair tool must possess some powerful algorithms which maintain the data integrity and never change the original format of the data.

The author is a renowned analyst of all the recovery tools and has specialized in examining the performance of such tools. He has suggested various tools and utilities for recovering corrupt MDF file and performing ms sql recovery.

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