Data Corruption in SQL Server and MDF Recovery

While interacting with MDF file of MS SQL Server, consider the given scenarios:

In MS SQL Server, you use SSMS (SQL Server Management Studio) to query character data from the SQL Server database which uses a non-Unicode data type. For instance, the SQL Server uses the char, varchar or the text data type.
The code page of client computer differs form code page of database.

In such circumstances, the character data may be represented incorrectly. For instance, you may face any of the following issues:

The characters are represented as the question mark. You might come across this issue if you have inserted or updated character data as non-Unicode data type prior to querying character data.
The characters are represented as corrupted. The characters of code page A are stored in non-Unicode column of code page B. Furthermore, the characters are not translated.

In such circumstances, the MDF file becomes inaccessible due to corruption and might lead to the data loss.

This crisis occurs as the characters of code page are stored in non-Unicode column of page B. In addition, the characters are not translated properly.

In SQL Server, when you use the string literal of non-Unicode data type, the string literal is changed by using the default code page of the database which is derived from collation of the database. Storing the character data of code page in a column of B code page might result into database corruption and data loss.

Resolution

To stop the database corruption and work around this issue, you may attempt the following:

Try a Unicode data type in place of non-Unicode data type
Try appropriate collation for SQL database
Try binary or varbinary data type
Try a diverse tool for storing and accessing data and disable data Translate parameter

These fixes will stop the database corruption but won’t be able to repair the corrupted database. To do so, you need to use SQL recovery software.

Stellar Phoenix SQL database recovery is the highly developed and the best ever made MDF recovery software, capable of repairing and restoring all of the MDF objects such as tables, reports, forms, macros, data types and so forth.

This MDF repair software deploys the most powerful scanning mechanism to end absolute SQL repair. The user interface of this SQL recovery software is extremely interactive and simple and doesn’t require any sound technical knowledge to carry out MDF recovery.

MDF Corruption Due to Size of Transaction Log File

In Microsoft SQL Server, every database contains minimum one data file and transaction log file. The SQL Server stores data physically into the data file. The transaction log file of the SQL Server data holds the details of all the alterations that you perform on the SQL Server database and also the details of all the transactions which are performed in every alteration.

Because the transactional integrity is considered as a fundamental and intrinsic feature of the MS SQL Server, logging the details of the alterations and transaction can not be turned off in the SQL Server.

The log files of SQL server is logically divided into several smaller segments, which are known as virtual log files. You can organize the transaction log file to expand as per your requirements.

The SQL Server transaction log growth can be governed by user or can be constructed to use the entire disk space available. Any alteration that MS SQL Server makes to the size of transaction log file, like truncating the transaction log file or increasing the number of transaction log files, are done in units of the virtual log file.

If the transaction log file, which communicates to the SQL Server database, is filled and you have set the selection for the transaction log file to cultivate automatically, then it grows in units of the virtual log files.

Occasionally, the transaction log file might become extremely large and you might run out of the hard disk space. When the transaction log file increases until the log file uses the entire available disk space and can not enlarge any more, you can not perform any alteration operation on the database. Furthermore, the SQL Server database becomes inconsistent and gets damaged.

It is really very grave situation for an SQL Server administrator and organization which can lead to the situation of data loss and may damage the entire business. Thus, it becomes very important to repair the damaged SQL Server database as soon as possible.

The SQL recovery is possible through the use of third party applications known as MDF recovery software. MDF recovery software are the completely automated SQL repair software which are able to perform MDF repair in all possible cases of corruption.

SQL recovery software are the fully programmed tools which performs thorough scan of the corrupted MDF file and carry out a complete and fruitful MDF recovery. No much user interaction is required by these MDF repair software which performing SQL repair.

Stellar Phoenix SQL Database Recovery software is the most advanced and the best ever made MDF recovery software which is the ultimate solution in all cases of SQL Server database corruption. The SQL repair, using this software, can be performed for all the objects of SQL Server database such as tables, forms, reports, data types, defaults, and many more.

A through scan of the damaged MDF file is performed by this SQL recovery software to extract all the data from it. The graphical user interface of this MDF repair software is extremely simple.

MDF Header File Corruption and SQL Recovery

The header file is the collection of relevant information, whose damage or corruption can make the file inaccessible. Even for the MDF file, which is the prime storage area of data for SQL Server, the header corruption can happen with regard of many reasons ranging from virus attack to application faults. The condition is peculiar and hard to digest for the database administrator.

However, in such situation, you may get error messages like the following:

“The file header is corrupted and is not a valid database file”

Or
“Msg 5172, Level 16, State 15, Line 1
The header for file 'D:\DbName\DbFileName.mdf' is not a valid database file header. The property is incorrect.”

Generally these error messages occur when the user tries to attach the MDF file to SQL Server.

The header file of MDF is corrupt. In this situation you can try out attaching the file by some other methods, instead trying it directly. Create the similar database and then exchange the corrupt files after shutting down the SQL service. After this, you can try to extract all the valuable information from the database by putting it into the emergency mode.

If you didn’t get the desired results as you are expecting then this is better to look for the SQL repair solutions to get the valuable information back. This is quite good if you have the proper backup of the database as this would be the SQL recovery cure without the assistance of external help. However, for the users who don’t have the backup, MDF recovery tools are here to help you out.

These MDF repair software have the power to scan the corrupted database with much efficiency and efficient scanning algorithms. With the ability to provide Graphical User Interface, this SQL recovery software benefits the users who use different file versions of SQL Server.

Stellar Phoenix SQL Database Recovery software does the marvelous job in repairing and restoring the corrupted database. This MDF repair utility comes with the value features which are valuable for getting the results. This is Read-only and non-destructive SQL repair software utility which assures you safe recovery in all instances of corruption.

The software is applicable to SQL Server 2000 and creates the script files after SQL recovery. You can have SQL repair for all the database objects like tables, triggers, stored procedures and so on.

SQL Recovery In situation of Incomplete Transaction Log Backup

Data is the lifeblood of an organization, and preserving a healthy backup and disaster recovery plan is tremendously significant for protecting your data and business.

Most of the organizations use servers to store their critical business data. The servers are reasonably more reliable than stand alone systems. MS SQL Server is an example of the most commonly used database servers.

It is most important to backup SQL Server data. SQL Server’s transaction log, that holds the most recent changes to last backup, should be the part of backup and disaster recovery plan. Without healthy and well maintained transaction log, you can recover the old data but users will still have to re-enter all the changes since the last backup.

If you fail to maintain the transaction logs, you might fail to do your job perfectly. In this case, though you have backup but it is incomplete and it’s of no worth. You can not perform absolute SQL recovery using this backup.

In such circumstances , you need for a solution which can repair the actual SQL file which has got damaged due to any of the reasons like unexpected system shutdown, application malfunction, virus attack etc. Nevertheless the reasons, MDF corruption can not be accepted at any cost.

The SQL recovery is feasible with the application of third party applications known as MDF recovery software. MDF recovery software are designed by several data recovery companies to completely scan the corrupted database and extract all of the data from it.

SQL repair software generally come with intuitive user interface, with rich graphical support, and thus do not require any sound technical knowledge to end up at complete MDF repair.

The most important thing, to ensure absolute SQL recovery, is to select the most powerful and highly developed MDF recovery software. The software should be of trusted brand and should be able to restore data in all cases.

The MDF repair software, offered by Stellar Information Systems Ltd is the best ever made and the most advanced SQL repair software, known as Stellar Phoenix SQL Database Recovery. SQL recovery software is developed according to the highest standards of the data recovery industry and is the most influential.

This SQL repair software deploys the scanning algorithms which are powerful enough to systematically scan the MDF file, repair and restore data from it. You can have MDF repair for all of the SQL Server database objects such as tables, reports, forms, macros, relationships, stored procedures, triggers and many alike.