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
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 Friday, November 12, 2010 at 3:06 AM
Are you facing assertion failure errors, while executing queries on MS SQL Server 2008 or 2005 databases? Does the query execution process fail halfway and you encounter errors? You may face the assertion failure problems due to either software bug or Master Database File (MDF) corruption. In both the cases, you can not access the database and come across data loss situations. In order to extract data in these circumstances, restore the database from backup. However, if the backup is unavailable, Master Database File Recovery becomes essential.
For example, the process may fail when you execute a distributed query, which uses linked server in MS SQL Server 2008 or in MS SQL Server 2005. Furthermore, you come across the below error message:
"OLE DB provider "SQLNCLI" for linked server "Linked Server" returned message "No transaction is active.".
Msg 3624, Level 20, State 1, Line 1...
Posted on Monday, November 01, 2010 at 5:26 AM
Allocation of MS SQL Server table data can be done either in B-tree or in heap structure. Data retrieval from a heap structure is slow as compared to retrieval from B-tree structure, which is very fast. B-tree structures minimize the navigation of your record, thereby resulting in fast retrieval of your data. B-tree structures use leaf nodes as storage components to save table records. Records saved in MS SQL Server table become inaccessible if these leaf nodes are missing, damaged, or not pointing to the correct parent node. In most of these situations, a database user encounters an error message. To overcome such error messages and to access table records, users can restore data from an updated backup. However, if no backup is available, then the user needs to opt for SQL Repair solutions.
To elaborate the above scenario, consider a realistic situation, wherein, you encounter the below error message while trying to access table records:...
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.”
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."
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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Posted on Thursday, June 10, 2010 at 5:29 AM
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 mdf 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.”
Posted on Wednesday, June 02, 2010 at 5:32 AM
Using the indexes in SQL databases is a good practice as it makes searching the records faster and easier. The indexes consist of various pages that are arranged in the form of B-tree structures. When a query is executed, the database engine goes all way from the root node to the exact branch where the data is located. Any discrepancy in this routine may result in corruption of the database table. Such discrepancies can arise due to various reasons such as virus infections, hardware incompatibility, corrupt operating system, etc. You should use appropriate corrective measures to rectify the problem. However, if you are not able to resolve the issue then you should use a third-party mdf database repair
software to repair SQL database table.
Consider a scenario wherein you face the following error message while working on the SQL Server 2000 database.
"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."...
Posted on Friday, May 28, 2010 at 10:32 PM
MS SQL Server provides the DBCC statements that are used to check and fix the databases for physical and logical consistency. There are various types of DBCC statements that you can use for the any particular purpose. However, at times these commands are not able to perform. The reason behind is that these database may have corrupted because of various reasons such as virus infections, hardware issues, human errors, etc. In such cases, you should use a third-party MDF repair
software to repair SQL database.
Consider a scenario wherein you are working on an SQL Server 2000 database. In this, you use the DBCC CHECKTABLE command on a particular table to make it more scalable and achieve parallelism. However, the command failed to execute. An error message is displayed, that is:
“CHECKTABLE terminated. A failure was detected while collecting facts. Possibly tempdb out of space or a system table is inconsistent. Check previous errors.”...
Posted on Thursday, May 20, 2010 at 5:13 AM
Software and hardware malfunctions are the primary cause for any file – including MDF – damage. Few common corruption scenarios for a MDF file damage are improper system shutdown, virus infection, simultaneous modifications, header corruption, application malfunction, flood, fire, and more. To overcome either of the situations, the database user can restore the data from an updated backup. However, in case of no backup or backup falling short of restore the required MDF file, the user needs to perform MDF database repair
. While MDF file corrupted due to physical damages need assistance of rich-experienced database repair technicians, logically damaged MDF files can be repaired using an effective third-party database repair application.
To illustrate the above case, consider a practical situation where you have a MDF file that contains your MS SQL Server 2005 database. The database was mounting systematically, until you encountered the below error message:...
Posted on Monday, May 17, 2010 at 2:50 AM
It is always frustrating to view an error message while trying to mount your database. The error message not only results in unmountability of the database, but also in inaccessibility of database records. Such error messages can be caused due to database corruption. Few main reasons responsible database corruption are metadata structure damage, network issues, hardware malfunction, improper system shutdown, and virus infections. To overcome such error messages, the database administrator needs to run an inbuilt repair utility named 'DBCC CHECKDB'. While this command is competent enough to repair a damaged SQL Server 2000 database, it might also result in loss of data from the database. To prevent any such data loss situation from occuring, you will need to repair the database by using a powerful MDF Database Repair
To explain the above situation in detail, consider a real-time scenario where you encounter a severity level 16 error message while trying to mount your SQL Server 2000 database:...
Posted on Friday, May 14, 2010 at 4:35 AM
A filegroup in MS SQL Server database is mainly a logical storage unit that saves database components, which map to multiple or a single file. Corruption in file groups can occur due to various reasons like improper system shutdown, application malfunction, metadata structure damage, virus infection, and more. In most of these situations, the database becomes unmountable and its records become inaccessible. An easy alternative to get past such SQL database corruption scenarios is by executing DBCC CHECKDB command. The command although successful in resolving all corruption scenarios can also fail in certain situations. These situations force the user to replace corrupt database with a valid and complete database backup. However, in case of unavailability of a valid database backup, you will need to opt for an effective MDF File Repair
To illustrate the above case, consider a real-time scenario wherein you receive the below error message while trying to mount your SQL Server database:...
Posted on Wednesday, May 12, 2010 at 2:17 AM
Tables of SQL Server database can be checked for consistency by running DBCC CHECKTABLE. An administrator requires to take immediate MDF Recovery
(SQL uses .mdf file extension to store its database) actions on encountering any issues with database table. Failing to do so might exaggerate the problems further.
After a general overview, here is a specific problem that will help you comprehend the problem. Let's say, you as an SQL Server administrator experiences some database access related issues that doubt database corruption. On running consistency check on the database table(s) using DBCC CHECKTABLE command, this returns the below or similar error message:
Table error: Object ID O_ID, index ID I_ID, page P_ID. Test (TEST) failed. Address 0xADDRESS is not aligned.
Depending on the exact cause, this specific error occurs in two states: State 9 and State 102.