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 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 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.”
Cause:...
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 application.
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 application.
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.
Explanation...
Posted on Thursday, May 06, 2010 at 4:57 AM
A DBCC CHECKDB failure error message (severity level 16 or 10) appears when corruption in database is beyond the repair limits of the command. Such severe corruption MS SQL Server database is caused due to metadata structure corruption, hardware damage, application damage, and improper server shutdown. Since, the inbuilt repair command is unable to repair the corrupted database, the database remains unmountable and its records also remain inaccessible. To access the database records in such cases, the user needs to restore the database from an updated backup. However, in case of incomplete database backup, the user can use a third-party
MDF Repair utility to repair the database.
To illustrate the above situation in detail, consider the below error message that appears when you run DBCC CHECKDB command to repair corrupted database:
“DBCC results for 'FVD_A'.
Msg 2511, Level 16, State 1, Line 1...
Posted on Wednesday, April 28, 2010 at 9:23 PM
Records stored in a MS SQL Server table become inaccessible when it gets corrupted due to record header corruption, metadata structure damage, application malfunction, and concurrent modification. To surmount table corruption, MS SQL Server provides an inbuilt table repair command known as 'DBCC CHECKTABLE'. The command checks the logical and physical integrity of the corrupted table and the indexed view. While in most cases, the command is successful in repairing corrupted tables, there are a few instances where the command falls short in repairing the MS SQL Server table. In such situations, the command displays an error message, exhibiting the exact reason for its failure. The table remains corrupt after DBCC CHECKTABLE failure message. To overcome such table corruption, an ideal option is to restore the table from an updated backup. However, in the absence of or in case of deficient table backup, the user needs to use a powerful third-party
MDF Repair utility...
Posted on Wednesday, April 21, 2010 at 2:31 AM
Table corruption in MS SQL Server database can occur during opening, closing, or modifying of the table. In most situations of database table corruption, users encounter an error message, which stops them from accessing the information saved in the table. The table can be corrupted either due to logical or physical factors. To access the information saved in the SQL Server table post its corruption, the user can restore the table from an updated backup. However, if the user has not created any backup or backup contains deficient values of the table, the user can repair the table using inbuilt repair command DBCC CHECKDB. The command, although successful in repairing table in most cases, can also result in loss of data from the table. To avoid any data loss, the user should opt for an effective third-party
MDF Recovery application.
To explain the table corruption issue in detail, consider the below error message:...
Posted on Friday, April 09, 2010 at 5:33 AM
MS SQL database corruption can result in serious damages, one of them being complete inaccessibility of all the records saved in database. To surpass any such corruption situation, a user can run DBCC CHECKDB command with a suitable repair clause. This command repairs the database in most situations by resolving all the physical and logical integrity issues. However, if the repair command displays an error message during repair, then it means that the database is beyond the repairing capabilities of DBCC CHECKDB command. In such cases, a database user can restore the database from an up-to-date backup and continue with his/her work. However, if the user has not maintained any database backup, then s/he needs to repair the database using a commercial
MDF Database Recovery application.
Consider a practical case, where you encounter the below error message when you try to repair your corrupted MS SQL Server database using DBCC CHECKDB command:...
