SQL Database Recovery to Handle Database Page Corruption

Microsoft SQL Server uses numerous objects to effectively manage your valuable data within the database and a database page is one among them. MDF (Master Database File) or MS SQL Server database is internally divided into pages. Every database page includes one 96-byte header, which contains page related information such as page type, page number, free space, and page ID. When metadata structure corruption takes place, it usually fails to read the pages and cause data loss. Data loss is one of the most critical situations that a computer user may face. It puts you in need of comprehensive SQL Recovery solutions.

SQL Server database pages are very much prone to corruption and may leave your data unusable in a number of cases. The pages corruption might be the outcome of improper editing of MDF file. As a practical example of the problem, you may come across the subsequent error message while attempting to mount an SQL Server database:

“Could not read and latch page P_ID with latch type TYPE. OPERATION failed.”

You get this error every time you try to mount your database. This behavior makes your significant data completely inaccessible. In such critical situations, you are required to find out the root cause of this issue and then fix it using SQL database recovery solutions.

Reason:

The most frequent causes of this problem with Microsoft SQL Server database corruption can be any of the following ones:

• The page that you are trying to access is in the repairing state.
• SQL Server is performing an intermediate operation on particular page.
• The page is read as the part of every checks of significant SQL database system tables.
• The page is too damaged to be recognized by MS SQL Server.

You may face this issue due to either logical or physical MDF file corruption.

Solution:

Use any of the following MDF recovery solutions to work around this issue-

• Detect and fix consistency issues using DBCC CHECKDB command. It is an inbuilt SQL repair tool of SQL Server.
• Restore database from the latest backup.
• When both the above solutions fail to work, go for third-party SQL database recovery software.

SQL Recovery applications are helpful to scan whole database and recover SQL database in all corruption scenarios. They help you recover all database objects, including Tables, reports, forms, Macros, queries, constraints, and more.

SQL Recovery to Fix “Repair this error..” Error in SQL Server Database

Microsoft SQL Server is an advanced RDBMS from Microsoft Corporation, which has three major versions- Microsoft SQL Server 2008, 2005, and 2000. It offers a wide range of features over the other database management systems, such as reliability, high-performance, and consistency. In order to check and fix consistency errors, it include DBCC CHECKDB tool. This is an inbuilt utility of the SQL Server that helps you perform SQL Database Recovery by fixing the common database problems.

DBCC CHECKDB is an advanced database maintainace command-line utility, which supports various parameters. You must follow the proper instructions while using these parameters, as some of the options may remove damaged data and cause complete data loss. DBCC CHECDB works in both physical and logical data problems. It provides errors that can be used to analyze the fix the problem.

However, under some circumstances, the command-line SQL recovery tool gives you error when it can not handle the problem. As an example of this problem with MS SQL Server database, consider the following error mesasge that occurs while scanning the database using DBCC CHECKDB command-

“Server: Msg 8905, Level 16, State 1, Line 0
Extent (1:6945928) in database ID 8 is marked allocated in the GAM, but no SGAM or IAM has allocated it.
Server: Msg 8905, Level 16, State 1, Line 0
Extent (1:6945936) in database ID 8 is marked allocated in the GAM, but no SGAM or IAM has allocated it.
Server: Msg 8905, Level 16, State 1, Line 0
Extent (1:6945944) in database ID 8 is marked allocated in the GAM, but no SGAM or IAM has allocated it.”

Subsequent to the above error message, you may also get the following error-

“Repairing this error requires other errors to be corrected first.”

To repair SQL database in such cases, you must first identify the root of the problem and then fix it using SQL recovery solutions.

Cause-

As stated in the above error messages, this problem occurs due to corruption to the SQL Server database. Corruption may occur after virus infection, unexpected system shutdown, application malfunction, and other similar reasons.

Resolution-

When DBCC CHECKDB cannot handle database corruption, SQL database recovery software come for your help. The SQL repair applications are designed to scan whole database using advanced scanning algorithms and handle all cases of corruption. Stellar Pheonix SQL Server Recovery is the most advnaced and comprehensive software to recover SQL database.

SQL Recovery to Handle Transaction Log Corruption in SQL Server

Microsoft SQL Server records all the database transactions in transaction log. Transaction is an operation that you perform on the database that can be read, write, modify, or delete. However, in some situations, an SQL Server operation that requires to process or read transaction log may fail due to corruption. The corruption usually leads to data loss and put you in need of SQL database recovery solutions.

When the operation fails, you may encounter the below error message that indicates that transaction log is damaged-

Error: 9004, Severity: 21, State: 1.
An error occurred while processing the log for database 'mydb'. If possible, restore from backup. If a backup is not available, it might be necessary to rebuild the log.

The State number of the error may vary for the error and indicates what is the type of corruption. To sort out this problem and perform SQL recovery, you must find the cause of this issue.

Root of the problem-

Error 9004 usually occurs due to corruption to the transaction log of Microsoft SQL Server database. The causes for the transaction log inconsistency are similar to the database corruption issue detected in MDF (Microsoft Database File) by DBCC CHECKDB command or SQL Server Engine. In order to identify y the actual reason of the corruption, you must follow similar techniques for the database corruption including file system and hardware analysis.

Resolution-

As stated above in the error message, you are required to restore the database from the most recent backup to recover SQL Server database. This is the most efficient and easiest SQL Server recovery solution.

If you do not have an updated backup in place, then you should run DBCC CHECKDB command on the database. It is an inbuilt tool of SQL Server that checks and fixes database inconsistency issues.

In case none of the above methods work, SQL recovery software come for your rescue. Third-party SQL database recovery applications are totally safe and easy to use with read-only conduct and simple graphical user interface.

Such applications effectively handle all database corruption issues. They work with all sizes of the database of Microsoft SQL Server 2008, 2005, and 2000. In order to ensure absolute SQL repair, you are highly recommended to use an advanced tool, such as Stellar Phoenix SQL Server Recovery.

Sql Recovery When Filestream Corruption Damaged Sql Server Database

When you try to restore the Microsoft SQL Server 2008 database (MDF file) from the sequence of transaction log backups, MS SQL Server 2008 database gets damaged. However, the original database, from which you took backup of the transaction log has not damaged. In these situations, the restore operation could not take place and thus your database become inaccessible and critical data loss situations occur. At this point, to gain access of your mission critical data, you are required to carry out SQL Recovery using appropriate solutions.

When the above problem of database corruption occurs, you might encounter the following event in the Application Event log of Microsoft SQL Server:

"Filestream corruption - missing files, error 7904.

The corruption is detected on a database that was restored from a sequence of backup logs. The original database does not seem to be corrupted.

7904 16 2 Table error: The filestream file for "FileID" was not found."

In above scenario, the data loss situations occur. In such cases, you get your valuable data back, you need to find out the cause of this problem and go for SQL Repair by sorting out this issue.

Grounds of the issue

This behavior of Microsoft SQL Server occurs due to filestream corruption. When it happens, the SQL Server database gets damaged as stated in above error message, and the database become inaccessible.

The Filestream is a critical SQL Server database component that integrates SQL Server Database Engine with NTFS file system by storing the varbinary(max) BLOB (Binary Large Object) data as the files on file system. Win32 file system interfaces offer streaming access to data. It uses NT system cache for data caching.

In all these cases, you encounter database corruption and need to go for SQL Recovery by repairing and restoring the database.

Recovery is best possible with the help of powerful and advanced third party applications, known as SQL Repair tool. They perform extensive scan of damaged database to extract all of the database objects such as tables, reports, forms, triggers and stored procedures.

These tools come equipped with interactive and simple graphical user interface and thus do not require sound and prior technical skills to carry out recovery process. With read-only behavior, they do not alter original contents of the database.

Getting table Error 8925 while working on MS SQL Server 2000 database?

Are you getting some table errors while working on MS SQL Server 2000 database? At times, these errors appear because of database corruption, which can be caused due to various reasons including header corruption in the MDF (Master Database File) file, virus infections, etc. Such corruption issues can make the SQL database vulnerable and may make it inaccessible. In such cases, you should use a third-party SQL database recovery software if you are unable to recover SQL database using any workaround.

Let us have a look at a practical situation in which you are getting the following error message while working on a database table in MS SQL Server 2000:

“Table error: Cross object linkage: Page P_ID1, slot S_ID1, in object ID O_ID1, index ID I_ID1 refers to page P_ID2, slot S_ID2, in object ID O_ID2, index ID I_ID2.”

Cause:

The root cause of this problem is that the P_ID1 page points to a P_ID2 in a different object.

Resolution:

To address this erroneous situation, you should look to recover MDF file. This could be done by doing either of the following methods preferably in the given order:

• Fixing the hardware related problems: You should try to resolve the reasons due to which the hardware parts may have become faulty. For this intent, the following measures can be taken:

  • Checking the error logs to confirm that some error has not occurred because of any hardware related problem.

  • Checking if write-caching is not enabled for the hard disks. If yes, then contact your hardware provider to the solutions.

  • Installing the operating system again after formatting the hard disk.

• Replacing updated backup with database: If the hardware parts are in perfect situation, then you should use the clean and updated backup to replace the database.

• Running DBCC CHECKDB: Lastly, you should run the DBCC CHECKDB utility to recover SQL database with the suggested repair clause.

If the problem is persisting and you are still getting the table errors, then there is a need of recovering the SQL database. For this purpose, I would recommend using a third-party MDF file recovery software. Use of fast and sophisticated scanning algorithms, non-destructive SQL recovery, and rich user interface are some of the salient features of these tools.

How to Repair Corrupted MS SQL Server 2008 Database by Rectifying Error 2537

Are you facing problems while using MS SQL Server 2008 database? Then, there may be chances that the database may have got corrupt. The database corruption can occur due to various reasons such as virus infections, abrupt system shutdown when the database is open, hardware problems, etc. Due to database corruption, you would not be able to access the database or face abrupt behavior. In such cases, you should perform appropriate SQL repair methods to solve the problem. If you are unable to repair MDF file, then you should use a third-party MS SQL repair software to do the needful for you.

Consider a scenario wherein you encounter the following error message while working on an MS SQL Server 2008 database:

"Table error: Object ID O_ID, index ID I_ID, partition ID PN_ID, alloc unit ID A_ID (type TYPE), page P_ID, row ROW_ID. Record check (CHECK_TEXT) failed. Values are VALUE1 and VALUE2."

Cause:

The root cause of such behavior is that the ROW_ID row (mentioned in the error message) failed the condition asked in the CHECK_TEXT.

Resolution:

To resolve this situation, you should perform the following methods in the given order:

Resolve the hardware issues: You should check the error logs and run hardware diagnostics to see if it has occurred due to any hardware malfunctioning. You can also swap the hardware components to isolate the exact reason for the error. Lastly if nothing works out, then you can also consider reformatting the hard disks and reinstalling the operating system.

However, for doing this you should ensure that you backup valuable data.

Restore from backup: If the problem is not hardware related, then you should check the backup. If it is updated and clean, then you should restore the database from its backup.

Run DBCC CHECKDB: If the backup is not updated, then you should run the DBCC CHECKDB tool with the suggested repair clause. This tool will rebuild the index, if exists.

The problem will be fixed once you perform the aforementioned MDF file repair methods. However, if it is not so and the problem is persisting then you should use a third-party MDF repair utility to repair SQL database. Such SQL repair tools possess rich user interface and use fast yet sophisticated scanning algorithms to repair mdf file.

SQL Data Recovery is an SQL repair software that repairs MDF files that are logically corrupted due to any reason. It is specifically designed to repair SQL databases created in MS SQL Server 7.0, 2000, 2005, and 2008. This MS SQL repair utility recovers various SQL database objects such as NDF files, tables, defaults, triggers, stored procedures, etc.

Memory allocation issues in MS SQL Server 2000 database results in Error 8902

In MS SQL Server, the system errors related with memory allocation often prove to be fatal for the database. Such problems can be caused by several reasons such as database corruption, which, in turn, can be the outcome of various other reasons. These reasons include virus infections, abrupt or unplanned system shutdown especially when the database is open, database header corruption, etc. You should try to find out the exact reason for such behavior and try to address the situation. If nothing works out, then I would suggest you to use a third-party MDF recovery software to recover SQL database.

Let us take a look at one of the system error that appears while you are working on an MS SQL Server 2000 database:

"Memory allocation error during DBCC processing."

Cause:

Such memory allocation error occurs when there is no memory for the non-clustered index coverage checks.

Resolution:

Such system errors relating to memory allocation should be dealt by performing the following MDF recovery methods. Please note that you should perform these methods only in the given order:

Recovering the hardware corruption problems
Restoring from database backup
Running DBCC CHECKDB utility

For more resolution details visit this link: http://www.americanchronicle.com/articles/view/177453

How to solve page header corruption cases in MS SQL Server 2008 database

You must have experienced cases of database corruption more often than not. When you face database corruption, you are unable to work further on the database. These instances can occur due to any arbitrary reason. Some of the most prominent ones could be unplanned system
shutdown especially when the database is open, page header corruption, virus infections in the database, etc. You can repair SQL database by using few workarounds. However, if nothing works fine then using a third-party SQL repair software is the best option.

For instance, the following error message appears while you are working on an MS SQL Server 2008 database:

“Table error: alloc unit ID A_ID, page P_ID. The test (TEST) failed. The values are VAL1 and VAL2.”

Cause:

Such problem has happened as a database page, P_ID, has not passed auditing test because of page header corruption. You can refer to the error message where it is clearly shown that the TEST string has failed the test.

Resolution:

In such erroneous situations, you should try to address the issue by performing MDF file repair. For the same purpose, there are the following methods that should be performed, ideally in the exact given order:

Verify the hardware components: You should check the state of the hardware components by the following measures:

Check the SQL Server error logs to verify if there is any hardware related error.

Swap the hardware components to narrow down on the exact hardware error, if any.

Check if the disk controller has enabled write-disk caching. If yes, then take the assistance of the hardware vendor to sort this issue.

Format hard drive and reinstall fresh copy of operating system to get a fresh and clean system.

Reinstate database using backup: If the hardware components are alright, then check the state of the database backup. If it is updated, then replace the database with the backup.

Now, check the database after performing these methods. The problem would not be appearing any more. However, at times the database is so severely damaged that it is not repaired using these methods. In such cases, the use of third-party MDF repair tools is required. These tools repair SQL database without overwriting the actual database thus ensuring safe and secure SQL recovery.

In these situations, the most recommended MDF repair software is Stellar Phoenix SQL Data Recovery that repairs MDF file from any random instance of database corruption. Developed for MDF files in MS SQL Server 7.0, 2000, 2005, and 2008, this MS SQL Server repair utility repairs several database objects such as stored procedures, collations, defaults, triggers, tables, NDF files, etc. In addition, this .MDF repair software is compatible with Windows 7, Server 2008, Vista, Server 2003, XP, and 2000.

Article Source :- http://www.programmersheaven.com/user/markwillium/blog/5740-How-to-solve-page-header-corruption-cases-in-MS-SQL-Server-2008-database/

Resolving Error 7965 and recovering corrupt database in SQL Server 2000

In SQL Server databases, an Index Allocation Map (IAM) page is a page type that stores the details about the extents, which is a collection of eight pages. These IAM pages are used to navigate through the heap, thereby making the searching process much faster. Well, at times these IAM pages do not exhibit the desired working due to database corruption. Database corruption can occur due to various reasons such as power outages, human errors, damaged hardware components, virus infections, etc. You should find out the cause and the resolution to recover SQL database. If you are not able to recover the database, then you should use a third-party SQL database recovery software to do the needful.

Consider a scenario wherein you encounter the following error message while working on the SQL Server 2000 database:

"Table error: Could not check object ID O_ID, index ID I_ID due to invalid allocation (IAM) page(s)."

Cause:

The root cause of this error message is that one of the IAM pages, which was identified by various Ids, has corrupted.

Resolution:

To resolve this erroneous situation, you should recover SQL database using the following methods, in the given order:

Check the hardware-related reasons: You should check the error log reports to check whether the error has occurred due to malfunctioning hardware components. You can also consider swapping the hardware components to isolate the actual reason for error. You may also consider reformatting the hard disks and reinstalling the operating system to get a fresh system to work on.

For Details Information Check This: http://www.americanchronicle.com/articles/view/166204

I/O Logical Check Failure Cause SQL Server Database Corruption

Like other databases and files, Microsoft SQL Server database may also come across various corruption issues. The corruption can take place due to various reasons, including the internal database or SQL Server application issues and system related problems. One major system related problem, which can cause MDF (Master Database File) corruption, is I/O logical check failure. In such situations, the database becomes totally inaccessible and you come across severe data loss situations. In order to get your mission critical data back, you need to repair and restore the corrupt database using SQL database recovery solutions.

The I/O logical check failure can be indicated by various error messages, which includes the following one:

“Error 823
I/O error detected during at offset in file ''”

The above error may also occur when SQL Server come across other system errors. After this behavior, SQL Server database become totally unusable. In order to sort out this problem, you need to fix it through SQL recovery methods.

Cause

If the read Windows API (Application Programing Interface) call or writer API call for SQL Server database is successful, but some particular logical checks are unsuccessful. In such cases, error 823 occurs, which resembles the following:

“2003-09-05 16:51:18.90 spid17 Error: 823, Severity: 24,
State: 2
2003-09-05 16:51:18.90 spid17 I/O error (torn page) detected during read at offset 0x00000094004000 in file 'F:\SQLData\mydb.MDF'..”

Resolution

In order to work around this behavior of Microsoft SQL Server database and perform SQL Server recovery, you should first run DBCC CHECKDB utility on the affected or damaged MDF file. Before you try to fix any system related issue with MS SQL Server, you should first check the database and sort out the problems. If DBCC CHECKDB statement fails to detect or fix any error, please check the Application Event Log of Microsoft SQL Server.

If the above method fails to find and fix any errors in Microsoft SQL Server, you need to restore the database from a valid and recent backup to get your valuable data back. In case backup is not available, you have to opt for third-party applications to repair and restore the corrupted MDF file.

The repair mssql applications are particularly designed to methodically scan entire database and extract all inaccessible data from it. The software have read-only approach and simple graphical user interface to ensure safe and easy recovery.

SQL Recovery is the most efficient and powerful utility to ensure absolute recovery in all MDF corruption situations. It works well with Microsoft SQL Server 2008, 2005, and 2000. The software restores all MDF file objects, such as tables, reports, forms, macros, stored procedures, and triggers.

Rectifying Error 5242 and recovering corrupt database in SQL Server 2008

A page is the most primitive unit of storage in an MS SQL Server database. The memory space allotted to a database file is divided into pages having contiguous address location. An Index Allocation Map (IAM) is a page type that stores the details about the extents used by a table per allocation unit. However, sometimes these pages do not function properly because of database corruption. You should take appropriate corrective measures to recover SQL database. However, if you are not able to restore the database then you should use a third-party SQL recovery software to do the needful for you.

Consider a scenario wherein you encounter the following error message while working on an SQL Server 2008 database table:

“An inconsistency was detected during an internal operation in database '%.*ls'(ID:%d) on page %S_PGID. Please contact technical support. Reference number %ld.”

Cause:

The root cause of this error message is that some inconsistency has occurred in the structure of the database page. It could have happened because of various reasons such as virus infections, abrupt system shutdown, hardware issues, etc.

Resolution:

To resolve this erroneous situation, you should perform either of the following methods, preferably in the given order:

Check for hardware issues: You should check the hardware components and the report logs to check whether the issue has occurred because of any hardware malfunctions. You should also swap the hardware components to isolate the error. Last but not the least, you can also consider reformatting the hard disks and reinstalling the operating system.

Restore from backup: If the issue is not hardware related, then you should check the backup of the database. If it is clean and updated, then restore the database from its backup.

Run DBCC CHECKDB: If the backup is not clean or updated, then you should run the DBCC CHECKDB utility without the repair clause to know the corruption level. Then, you should the run it with the suggested repair clause.

The aforementioned methods should be able to bring about the solution to the problem. However, if you are not able to repair the corrupted database then you should use a third-party SQL database recovery software to do the needful. Such read-only tools are able to recover SQL database using fast yet sophisticated scanning algorithms.

Stellar Phoenix SQL Database Recovery is an MS SQL recovery software that repairs the corrupted databases created in SQL Server 2008, 2005, and 2000. It is able to recover various database objects such as tables, queries, stored procedures, triggers, defaults, etc. In addition, this SQL server repair tool is able to recover the user-defined functions and data types. It is compatible with Windows 7, Vista, Server 2003, XP, and Server 2000.

Minimum Repair Option for the SQL Server Database Inconsistency Issues

In Microsoft SQL Server, if any transaction violates the integrity constraints during execution, database inconsistency occurs. The transaction leaves your MS SQL Server database in illegal state and it gets aborted with an error. Database inconsistency leaves your MDF (Master Database File) in an unusable and inaccessible state, which can lead to serious data loss. In such cases, a valid and updated backup come for your rescue. You can easily restore all your valuable data from current backup and prevent needs of SQL recovery using third-party applications.

However, in case you are unable to restore data from the backup or backup is incomplete, you can check the database errors and fix them using inbuilt utility of Microsoft SQL Server, called CHECKDB. It offers you an option to repair the database errors. Database inconsistency may also occur due to system level errors, like file system and hardware. You are highly recommended to fix these errors before repairing the database, else you may face the same problem again after some time.

When you apply DBCC CHECKDB on your MDF file, a suggestion is provided for indicating what minimum repair option is required to fix all errors. Such messages may resemble the following:

“CHECKDB found 0 allocation errors and 15 consistency errors in database 'mydb'.
repair_allow_data_loss is the minimum repair level for the errors found by DBCC CHECKDB (mydb”

The database repair recommendation is minimum degree of repair to try resolving all the errors from DBCC CHECKDB. It doesn't mean that the operation is capable of actually fixing all the errors and recover SQL database. You should also keep in mind that not all the errors reported by DBCC CHECKDB, where repair_allow_data_loss is suggested, cause data loss.

However, some of the database inconsistency errors can cause severe data loss problems. You must run the repair process for determining if solution of a particular error is going to cause data loss. In order to find errors with a specific SQL Server database table, you can try running DBCC CHECKTABLE tool.

In case you run across database corruption and data loss due to any inconsistency error, MS SQL repair becomes need of hour.
You can easily repair and restore damaged MDF file of SQL Server using SQL Server recovery software. The applications use advanced scanning algorithm to provide assured recovery of all your valuable data.

Stellar Phoenix SQL Recovery is the best utility to ensure absolute recovery of inaccessible SQL Server database. The software works well with Microsoft SQL Server 2008, 2005, and 2000. It is capable of restoring all MDF file objects, such as tables, reports, forms, macros, triggers, stored procedures, data types, and constraints.


Article Sources: http://www.articlecat.com/Article/Minimum-Repair-Option-for-the-SQL-Server-Database-Inconsistency-Issues/403169

How to Resolve 'Error 823' While Accessing SQL Server Database?

Are you getting 'Error 823' while accessing an SQL Server database or modifying the database? Are you getting various database inconsistency errors while querying SQL Server database? Well, the problem may take place if your SQL Server database is either inconsistent or damaged. In such critical situations, you must have a complete backup to restore data from it. However, the situations may become worse if there is no current backup in place. At this point of time, you have to opt for SQL recovery tools to get your valuable data recovered.

You may come across the below errors in Windows Application Event Log or MS SQL Server ERRORLOG while performing any operation on MDF (Master Database File) of SQL Server:

"2010-03-06 22:41:19.55 spid58 Error: 823, Severity: 24, State: 2. 2010-03-06 22:41:19.55 spid58 The operating system returned error 38(Reached the end of the file.) to SQL Server during a read at offset 0x000000a72c0000 in file 'C:\Program Files\Microsoft SQL Server\MSSQL10.SQL2008\MSSQL\DATA\my_db.mdf'. Additional messages in the SQL Server error log and system event log may provide more detail. This is a severe system-level error condition that threatens database integrity and must be corrected immediately. Complete a full database consistency check (DBCC CHECKDB). This error can be caused by many factors; for more information, see SQL Server Books Online."

2009-12-09 04:53:49.170 spid25s Error: 823, Severity: 24, State: 2. 2009-12-09 04:53:49.170 spid25s The operating system returned error 21(The device is not ready.) to SQL Server during a read at offset 0x00000000132000 in file 'D:\tempdb\tempdb_data.mdf'. Additional messages in the SQL Server error log and system event log may provide more detail. This is a severe system-level error condition that threatens database integrity and must be corrected immediately. Complete a full database consistency check (DBCC CHECKDB). This error can be caused by many factors; for more information, see SQL Server Books Online.

Cause:

The Error 823 may occur due to either SQL Server database corruption or I/O errors in the database. The error usually indicates that that there are some inconsistency in file system or the database file is corrupt.

Resolution:

To recover SQL server database, use any of the below methods:

Run Chkdsk to find file system inconsistency issues and resolve it.

Use DBCC CHECKDB utility to try repairing the damaged database.

If the above methods can not perform MS SQL recovery, You need to use third party applications to repair and restore the damaged database. The MDF Repair software performs safe, quick, easy, and absolute recovery in all MDF corruption situations.

Stellar Phoenix SQL Recovery is the most advanced and efficient utility to ensure absolute recovery of damaged database. The software is designed for Microsoft SQL Server 2008, 2005, and 2000. It restores all the objects of MDF file, such as tables, reports, forms, macros, triggers, constraints, and stored procedures.

Resource taken from: http://www.programmersheaven.com/user/markwillium/blog/5372-How-to-Resolve-Error-823-While-Accessing-SQL-Server-Database/

How To - Fix Stored Procedures Corruption in MS SQL Server?

Are you encountering errors while executing stored procedures in Microsoft SQL Server database? Is stored procedure not producing correct outputs? The problem may occur due to corruption of the stored procedures. After corruption, the database may not function correctly and you will need to repair it. In some cases, corrupt stored procedures may even damage the database if they perform improper database functions. In both these cases, you need SQL Database Recovery applications to get your database repaired.

• Stored Procedure is in fact a set of Transaction- SQL (T-SQL) statements, which are compiled in a single query execution plan. It works like a construct in programming languages. The stored procedure has a number of advantages, such as pre-compiled execution, enhanced security controls, reduced client/server traffic, effective reuse of programming abstraction and code, and many more.

You can use the stored procedure to run a sequence of the SQL statements on conditional logic. If the conditional logic and the SQL statements are written in stored procedures, they become a part of a single execution plan. However, in this case if any of the stored procedure gets damaged, you may come across a number of critical database corruption situations.

Corruption of the stored procedures may degrade the efficiency of MS SQL Server database and produce bad output. The function that needs to be executed using stored procedures might come down. This behavior usually makes the SQL Server database fragile. Stored procedure corruption may be indicated through a number of error message, similar to the following ones:

“Error 0:[SQL-DMO]Object 'dbo.SP_ProcName' was not scripted. It is possible that the information in system table 'syscomments' about the object was corrupt or missing?”

Or

“Incorrect key file ... try to repair it”

SQL Server database stored procedures may occur due to virus infection, improper system shutdown, application malfunction, improper command execution, and many alike. Irrespective of the cause of this problem, data loss occurs and SQL Recovery is required.

You can easily Recover SQL database with the help of third-party SQL Server Recovery applications. They come equipped with highly-advanced and efficient scanning techniques to ensure absolute recovery of damaged SQL database. The software are built-with simple and self-descriptive graphical user interface to provide ease of use.

Rectifying Error 5228 in SQL Server 2008

When you use the DML (Data Manipulation Language) commands to update the database, the rows sometimes get in an intermediate state. It is called the antimatter state that enables concurrent DELETE statements to leave a pointer for the index builder transaction so that deleted rows are not inserted again. Ideally, these rows should be deleted at the end of the operation. However, sometimes it does not happen that invariably results in database corruption. To resolve this situation, you should use appropriate corrective methods. However, if you are unable to do so then you should use a third-party SQL Server recovery software to address the issue.

Consider a scenario wherein you are working on a table in SQL Server 2008. You get the following error message while performing some modifications on the database table:

“Table error: Object ID O_ID, index ID I_ID, partition ID PN_ID, alloc unit ID A_ID (type TYPE), page PG_ID, row R_ID. DBCC detected incomplete cleanup from an online index build operation. (Antimatter column value is VALUE.)”


Cause:

The root cause of this error message is that for the O_ID object , I_ID index, and PN_ID partition, there is an unfinished online index build was detected. This is testified by the presence and the displayed value of an antimatter column on the R_ID row.

Resolution:

To resolve this error message, you should perform the following methods, preferably in the given order:

Check for hardware issues: You should run the hardware diagnostics and check if the error appeared because of any hardware issue. You can also try to swap the hardware components to zero in and resolve the issue. In addition, you can try to reformat the disk and reinstall the operating system.

Restore from backup: Check if you have a clean and updated backup of the database. If yes, then you should restore the database with its backup.

Run DBCC CHECKDB: As a last resort, you should run the DBCC CHECKDB command without the repair clause to ascertain the level of the corruption. You should run the command again after knowing the repair clause. It will rebuild the corrupted indexes.

However, if you still are not able to resolve this error by any which method then you should use a third-party SQL recovery software. Such read-only tools are able to recover SQL database using sophisticated scanning algorithms without overwriting the original data.

Stellar Phoenix SQL Recovery is an MS SQL recovery software that enables you to recover corrupted databases created in SQL Server 2000, 2005, and 2008. It is competent enough to restore various objects of SQL database such as tables, queries, stored procedures, triggers, views, etc. This SQL recovery software is also able to preserve the database constraints and user-defined data types. It is compatible with Windows 7, Vista, Server 2003, XP, and Server 2000.

Resolving Error 5171 in SQL Database

SQL database corruption can occur due to SQL Server malfunctioning, virus infection, improper system shutdown, hardware failure and many more. Once the MS SQL database gets corrupted, the SQL database become inaccessible. In such situations, use you backup, if there is no backup, the user needs to repair mdf file by using advanced SQL MDF Repair application. Consider a practical scenario, where a user is working on SQL Server 2005 and creating a report. While doing so, the Windows restarts due to power failure. When user restart the system, the SQL database becomes inaccessible. When the user tries to attach the MDF manually, he encounters the below error message:

“An exception occurred while executing a Transact-SQL statement or batch. _db.mdf is not a primary database file. (Microsoft SQL Server, Error: 5171).” Or

“C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\MYDATABASE.mdf is not a primary database file. (Microsoft SQL Server, Error: 5171)” In such circumstances, the database administrators recommend to attach a single file. However, when the user uses sp_attach_single_db Stored Procedures, the user encounters the following error message:

“Server: Msg 5172, Level 16, State 15, Line 1 The header for file path……\.mdf is not a valid database file header. The PageAudit property is incorrect.”

The above error message encounters due to MDF file corruption. The above issue occurs when the MDF file header gets corrupted or some invalid information is inserted in the header file. All these situations result, inaccessibility of the SQL database. To ensure accessibility of the SQL database, the user needs to recover it by using the latest backup. But sometime user has not created any backup of its database or mdf file, then he needs to perform MDF repair. To do so, user needs to use efficient and effective MDF repair application. Such mdf file repair applications incorporate advanced and powerful scanning algorithms to repair the corrupted MDF file. The mdf recovery software perform systematic scan of corrupted MDF files, repair and restore them in their original format without altering any information.

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Troubleshooting Error 8999 in SQL Server

All the users connected to the SQL Server instance have access to a global resource called tempdb system database. This database holds temporary user objects, internal database objects, and row versions that result from data modification. At times, when some allocation checks are performed on this TEMPDB database, they may result in allocation errors and unexpected results. Since TEMPDB cannot be put in offline mode, no fixes are possible for allocation errors in this database. However, for rest of the SQL databases, you can perform MS SQL Repair using suitable tools and utilities.

For exemplifying the given problem, consider, you might start receiving unexpected database access problems in MS SQL Server database. To determine the exact cause of the problem, you run CHECKDB command and the below error message pops up:

“Database tempdb allocation errors prevent further CHECKNAME processing.”

This error message is recorded with error number 8999 and severity level 10.

Cause

The above error results specifically when the entire check operation terminates because of allocation error in TEMPDB.

If database is still corrupt, the root cause of corruption is hardware problems.

Solution

To resolve the issue, you should:

Diagnose the SQL Server™ error and Microsoft® Windows NT® system log for determining if the problem has actually resulted due to hardware problems. You can also run hardware diagnostics and fix related concerns by, swapping the hardware components or installing a new hardware system etc.

restore the database from the last available backup, if hardware issues have not been the problem.

Run DBCC CHECKDB and determine the extent of database damage, in case no suitable backup is present. Later, you can run the same command but with a suitable SQL Repair clause to fix database corruption. However, you should backup the database before executing database repair as data loss is likely.

Run MS SQL Repair software for repairing corrupted SQL database. These utilities generally repair the database after any type and extent of damage.

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Repairing SQL Server master database – Error 3417

SQL Server is a relational database management system (RDBMS) by Microsoft that is designed for the enterprise environment. It has got two primary query languages, T-SQL and ANSISQL. It provides you the flexibility to access your database from anywhere, be it from a data center, desktop, or from a mobile device. It also provides combined services to query, search, synchronize, report, and analyze the database records. However, at times it may happen that the SQL Server is unable to run. It may be possible that the master database has gone corrupt. This can be possible because of various reasons such as virus infections, human errors, power outages or abrupt system shutdown while SQL Server was open. In such cases, you should replace the corrupted database with its updated backup. However, if the backup is not updated then you should use a third-party SQL Database Recovery software to recover SQL database.

Consider a scenario wherein you have MS SQL Server 2008 installed on your system. When you log onto the SQL Server, you are unable to do so. An error message is displayed, that is:

“Cannot recover the master database. SQL Server is unable to run. Restore master from a full backup, repair it, or rebuild it. For more information about how to rebuild the master database, see SQL Server Books Online.”

Cause:
The cause of the mentioned error message is that the SQL Server is unable to start the master database. If the master or tempdb database cannot be mounted, SQL Server cannot run. It is quite possible that the master database has gone corrupt because of various aforementioned reasons.

Resolution:
To resolve this issue, you should, first of all, check whether there is an updated backup of the master database. If yes, then you should replace it with the corrupted database. However, if the database is not updated then you should use a third-party SQL database recovery software to perform SQL Recovery of the corrupted database. Such read-only tools are able to recover SQL databases using fast yet sophisticated scanning algorithms.

SQL Database Recovery is an SQL Server recovery tool that enables you to perform SQL database recovery of the corrupted databases. It is able to repair various database components such as tables, defaults, stored procedures, triggers, views, and rules. It can also repair user-defined data types and functions and also database constraints such as primary key, foreign key, unique key, and check. It is compatible with Windows 7, Vista, Server 2003, XP, and 2000.

Incorrect Updating of System Tables Cause Database Corruption in SQL Server

When you create an MS SQL Server object, the properties of objects are known as metadata. SQL Server stores metadata in a special tables, known as System Tables. You can update these tables as per your requirement. It is quite easy to update system tables by defining the triggers. However, MS SQL Server automatically updates most of the system tables internally using inbuilt API. You should always create a complete backup of all the system tables, before you try to update them. If the update fails or you improperly update the table, your SQL Server database may get severely damaged and you need SQL Database Recovery to be fixed.

The system tables are automatically created by Microsoft SQL Server, when you create an object. For instance, Microsoft SQL Server 2000 stores all your data types and column names in the internal system table, known as 'syscolumns'. The metadata, stored in system tables, can be used to gather performance statistics, discover column and table differences and similarities while upgrading the database, and obtain lock information.

In Microsoft SQL Server 2005 and later versions, the System tables are hidden and cannot be queried like general database tables. These tables are restricted even for the user who have full Database Administrator privileges. Though, system tables are not accessible directly, but there are various inbuilt procedures and views to extract metadata from them.

After accessing the system tables and metadata, you can update them, if required. The update process can be used to add new options or to remove some existing options.

You should work safely while updating the system table. Incorrect or improper updating of SQL Server system tables may lead to severe problems, which might need to reinstall Microsoft SQL Server application. It may also damage the SQL Server database. There is no guarantee of successful updating. Before you prompt for updating system tables, you are highly recommended to create a good backup of SQL Server database.

In case SQL Server database gets damaged due to incorrect updating of system tables, perform SQL Server Recovery by restoring the database from backup.

If backup is unavailable, use MS SQL Recovery software to sort out the problem. The applications are specifically designed to thoroughly scan entire database and extract all inaccessible data from it. They perform simple and secure SQL Recovery with interactive design and read-only behavior.

SQL Recovery software repairs and restores damaged Microsoft SQL Server database in all cases of corruption. The software works well with MS SQL Server 2008, 2005, and 2000. It recovers all damaged SQL Server database objects, such as tables, views, reports, triggers, stored procedures, data types, and more.

SQL Server Instance Does Not Start After Restoring Model System Database

Microsoft SQL Server holds a set of the system database that are required for options of Microsoft SQL Server instance. You should backup the system database after each critical update, to prevent database corruption. The system database backup must include model, master, and msdb. You can restore Microsoft SQL Server easily from backup, in the event of the system failure. However, in some situations, the SQL Server's MDF (Master Database File) file may become completely inaccessible after you restore a model system database from backup. It leads to critical data loss situations and requires SQL Database Recovery to work around the problem if backup is not updated.

In a practical scenario, you may not start an instance of SQL Server successfully, when you attempt to initialize any instance of MS SQL Server after restoring model system database using 'WITH NORECOVERY' option. Furthermore, you may come across the below error message in the application error log of Microsoft SQL Server at the same time:

“2003-04-18 09:37:38.85 spid5 Starting up database 'model'.
2003-04-18 09:37:39.24 spid5 Bypassing recovery for database 'model' because it is marked IN LOAD. 2003-04-18 09:37:39.65 spid5 Database 'model' cannot be opened. It is in the middle of a restore.”

This behavior of Microsoft SQL Server renders entire MDF database file inaccessible and serious data loss occurs. To retrieve data from affected database, you need to Repair SQL Server database file by fixing this problem.

Root of the problem

When the model system database is restored using 'WITH NORECOVERY' option, restore options leaves your SQL Server model database in unrecovered state. Thus, you can no longer use the model system database as expected. Due to the same, SQL Server may not function effectively.

Resolution

To sort out this behavior, clear 'Loading' status of model system database in instance of Microsoft SQL Server. In case the SQL Server database is severely damaged and model database is also affected, reinstall SQL Server application and restore database from updated backup.

If you do not have backup, use third-party MS SQL Recovery software to repair and restore the database into accessible and working state. The SQL Recovery applications use advanced scanning algorithms to systematically scan whole database and extract all inaccessible objects from it.

SQL Recovery is a powerful, yet easy to use and safe utility to ensure absolute recovery in all SQL Server database corruption scenarios. The software works well with Microsoft SQL Server 2008, 2005, and 2000. It restores all MDF file objects, such as tables, reports, forms, macros, constraints, stored procedures, and triggers.