Posted on Wednesday, March 23, 2011 at 11:43 PM
While working on your SQL Server database, sometimes the database tables become completely inaccessible following any corruption or damage to the database. The reason behind the corruption can be virus attack, file system corruption, application malfunction, simultaneous access by the number of users beyond the upper load limit etc. In any of these situations, the database flashes some sort of error message, which points toward a possible problem with the database. You need to resolve the error to regain access to the database tables. However, if you failed to resolve the issue, there are third-party SQL database recovery tools available, which can help you recover the database back.
The error message that you may have encountered can be read as below:
“
Table error: Extent P_ID object ID O_ID, index ID I_ID is beyond the range of this database.”
After encountering the error message, you can not be able to access any record from the SQL database and receive the same error, each time you try to access any table...
Posted on Thursday, February 10, 2011 at 4:40 AM
If you are using a Microsoft SQL database for storing your valuable business transactions and financial information, then, any instance of database corruption can be a huge blow to your business. The damage to the database can result in the complete inaccessibility of the data stored n it. In such cases, you can run ‘DBCC CHECKDB’ from the command-line, which can repair and fix the MS SQL database errors. If with higher degree of corruption, the database DBCC CHECKDB fails to resolve the problem, you can always run an reliable SQL repair utility to accomplish the job safely.
Following are some of the error messages, which you may encounter, while trying to fix them with 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...
Posted on Friday, January 28, 2011 at 1:39 AM
Microsoft SQL Server database supports binary tree indexes for fast query. The pages of Binary tree index are known as index nodes, the top node of binary tree is known as root node. However, the middle nodes are known as branch nodes and bottom nodes are known as leaf nodes. If table indexes get damaged, SQL Server database shows an error message and you unable to access your SQL database. To resolve such situations, you should use your most latest backup and restore the lost data. Sometimes, backup fails to restore the database and thus, you need to use
SQL database recovery software.
You are working on SQL Server database wherein, You might get below error message:
Server: Msg 8936, Level 16, State 1, Line 1
Table error: Object ID O_ID, index ID I_ID. B-tree chain linkage mismatch. P_ID1->next = P_ID2, but P_ID2->Prev = P_ID3.
Root Cause of Problem:...
Posted on Thursday, January 20, 2011 at 9:28 PM
Sometimes when you want to update or delete SQL server database table and got an error message that shows your SQL server database table has been corrupted. This may happen by the several reasons some of them are improper system shutdown, virus attack, hardware failure, power failure and many more. At this situation you will be unable to access your SQL server database table. For fixing this problem you should use an advanced SQL server recovery software that will repair and restore your damaged SQL server database table.
Consider a practical scenario wherein, you may encounter the given below error messages while your are trying to update, delete or open an SQL server database table:
“Error: 644, Severity: 21, State: 5
Could not find the index entry for RID '1613b1000000100' in index page (1:189), index ID 7, database 'TestDB'..
Error: 8646, Severity: 21, State: 1
The index entry for row ID was not found in index ID 7, of table 2009058193, in database 'test644'.”...
Posted on Wednesday, December 08, 2010 at 4:17 AM
The technique used in locating and placing data in SQL Server Database is known as B-tree. A B-tree contains a tree-level page that maintains and stores a key value for each child page. In case, the child page is leaf-level page, then all records stored on the tree-level page should contain key values equal to or greater than the key value stored in parent page. However, in case the child page is tree-level page, then all records stored on the tree-level page should contain key value that is equal to the value stored in parent page. Corruption in B-tree results in changing the values of tree-level values, further resulting in the inaccessibility of database records. The best way to surmount any B-tree corruption scenario is by restoring the data from an updated backup. But, in case of absence of an updated backup, you will need to opt for an advanced sql database repair application that can repair your database and provide access to all inaccessible database components...
Posted on Monday, November 22, 2010 at 4:11 AM
The fast results of SQL queries is a result of b-tree indexes used by a SQL Server. A single B-tree consists of number of index nodes, root nodes, branch nodes, and leaf nodes that enable you to systematically store your data.
Corruption in any of the nodes (specially index nodes) can result into inaccessibility of records stored in the database. In most of these situations, you encounter an error message stating the exact cause. To surpass the above database inaccessibility circumstances, you will need to use restore the data stored from an updated backup. However, in absence of an updated backup or backup falls short to restore the required data, then you will need to search for advanced third-party sql repair application.
Consider a practical scenario, where you receive the below error message when you attempt view the records saved in your SQL Server database:
Table error: Object ID O_ID, index ID I_ID. B-tree chain linkage mismatch. P_ID1->next = P_ID2, but P_ID2->Prev =P_ID3...
Posted on Thursday, September 02, 2010 at 4:01 AM
An extent in the SQL Server databases is a collection of eight consecutive pages, whose details are stored in an IAM (Index Allocation Map) page. An IAM page stores the details of an object and index with the information of the previous and next objects as well. However, sometimes the IAM definitions get corrupt due to issues like header corruption, virus infections, damaged hardware parts, etc. For such cases, you can adopt corrective measures to rectify the issue. If none of the measures works, then there is a need of using a professional
MDF file repair software to perform MDF recovery.
Looking at a practical situation in which you encounter the following error while working on an MS SQL Server 2000 database:
“Page P_ID in database ID DB_ID is allocated to both object ID O_ID1, index ID I_ID1, and object ID O_ID2, index ID I_ID2.”
Cause:
This problem has appeared as the P_ID page is allocated to two different objects, which is incorrect...
Posted on Thursday, August 26, 2010 at 4:37 AM
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...
Posted on Wednesday, August 25, 2010 at 4:52 AM
Write-caching is the best way to improve data write and read process of your Microsoft SQL Server. It enhances the data reliability and makes the database transactions faster. However, in some situations, it may also lead to database inconsistency and database corruption. The problem generally occurs if Microsoft Exchange Server computer shuts down abnormally before successful completion of particular transaction. In such situations, entire database become inaccessible and you encounter severe data loss. In order to get your precious data back in such cases, you need to opt for SQL Server recovery solutions, if backup is not updated.
As a practical example of this problem, consider the following scenario with your Microsoft SQL Server that has write-caching enabled:
SQL Server writers a log record for 100th page in database.
SQL Server log record is stored in a non-battery-based cache, however database engine is informed that log writer is successful...
Posted on Friday, August 20, 2010 at 9:36 PM
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