Tuesday, April 12, 2011
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.
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.
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.
Tuesday, April 5, 2011
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.
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.
Thursday, March 17, 2011
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.
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.
Monday, October 25, 2010
Wednesday, September 1, 2010
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.”
The root cause of this problem is that the P_ID1 page points to a P_ID2 in a different object.
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
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."
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.
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
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."
Such memory allocation error occurs when there is no memory for the non-clustered index coverage checks.
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