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.
Thursday, March 17, 2011
Monday, October 25, 2010
Wednesday, September 1, 2010
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.
Thursday, August 26, 2010
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.
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.
Tuesday, August 24, 2010
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
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
Sunday, August 1, 2010
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/
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/
Saturday, July 3, 2010
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
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
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