Repair mssql database

An MS SQL Server database file is divided into various PFS (Page Free Space) intervals, approximately 64 MB in size. The byte-map of the PFS page consists of at least one byte per page for every page that is included in the PFS interval. The information stored in the PFS interval is very critical because corruption of it can result into database error, which stops you from accessing the records stored in the database. In such situations, the database corruption can be surmounted by restoring the data from an updated backup. However, the possibilities of database users forgetting to create an adequate backup, or the location where the backup is saved always exits. In such cases, the database user needs to opt for a powerful third-party SQL Database Repair utility that can easily repair the database.

Picture a scenario, where you receive the underneath error message with your MS SQL Server database:

“Incorrect PFS free space information for page P_ID, object ID O_ID, index ID I_ID, in database ID DB_ID. Expected value PFS_VAL1, actual value PFS_VAL2.”

The above error is marked as “Error 8914” in SQL Server log and is a “Severity Level 10” error message.

Cause:

The above error message pops up when the bits allocated in the PFS page conflict with the free space available on the page P_ID. This can either occur due to logical or physical damage of the database.

Resolution:

The resolutions for the above error message are discussed below:

· To check for hardware damages, check the system’s hardware by examining the log reports of SQL Server and Windows. Change the hardware component in case any component is damaged.

· If the problem persists, run DBCC CHECKDB command (with repair clause) to repair the corrupt database.

However, there is a possibility of data loss after running the above command. To avoid such situations, you should repair your database using effective SQL Repair software. These SQL Repair tools perform a complete scan and restore the repaired database on new or old destination. Such tools are completely non-destructive in nature.

Stellar Phoenix SQL Recovery supports SQL Database Repair of databases created in SQL Server 2008, 20005, and 2000. With self-descriptive user-interface, advanced repair options, and read only nature, the tool repairs almost all database objects. The repair utility is compatible with Windows 7, Vista, XP, 2003, 2000 and NT operating systems.

In SQL Server database, rows of a table are divided and stored into a series of partitions. These rows can either be saved in heap or B-tree structure. In heap tree structure, the table does not contain any Index and the forward row always points back to the forwarding row. However, in B-tree structure the rows are saved in accordance to the Index values. Corruption in metadata structure of your SQL database results in changing the values of these rows, thereby resulting in inaccessibility of all database records. An easy way to surpass such corruption scenarios is by using restoring the data from an updated backup. But, the possibility of backup being corrupted or damaged always exist. In such situations, an ideal way is to repair your database by using an effective SQL database repair software.

Consider a scenario, where the underneath error message pops up every time you attempt to mount your database:

“Forwarded row mismatch: Object ID O_ID, page P_ID1, slot S_ID1 points to forwarded row page P_ID2, slot S_ID2; the forwarded row points back to page P_ID3, slot S_ID3.”

Your database records become inaccessible after the above error message appears.

Cause:

The main reason of the above error message is that the forwarded row (S_ID2 on page P_ID2) instead of pointing to forwarding row (S_ID1 on page P_ID1), is pointing to the wrong row.

Note: The above case can occur due to both logical and physical corruption scenarios.

Resolution:

The resolution for the above error message is mentioned below:

· Swap the system component that is damaged with a new component.
· Execute DBCC CHECKDB command.

While the former resolution to overcome hardware related issues is perfect, the later solution might fail to resolve logical corruption issues. For complete and systematic resolution in all logical corruption scenarios, you will need to opt for advanced SQL Database Repair tool. Such tools provide maximum SQL repair by employing high end scanning and repairing algorithms. These tools are non-destructive and perform recovery without making any changes in the original database file.

Stellar Phoenix SQL Recovery is one answer to all logically corrupted SQL databases. The SQL Repair software repairs SQL databases created in SQL Server 2008, 2005, and 2000 and recovers tables, stored procedures, views, and similar database components. The recovery tool is compatible with Windows Vista, XP, 2003, 2000 and NT.

Every page in SQL Server database contains a unique object and index ID stored in its header. Corruption in object or index ID makes the records saved on that page inaccessible. Few scenarios under which the corruption can take place are improper system shutdown, virus attacks, and human errors. To overcome such situations, an easy way is to restore the data from an updated backup. But if in case, you have not created any database backup or backup falls short to restore the required records, then you will need to opt for advanced SQL Database Repair software that can repair your database and allow you to access the records.

Consider a practical case, where you encounter the below error message when you attempt to view some records saved on a particular table:

“Table error: Page P_ID with object ID O_ID, index ID I_ID in its header is allocated by another object.”

The above error message makes the data stored in the table inaccessible. Additionally, you encounter the same error message each time you attempt to view the records saved in that table.

Cause:

The above error message can occur due to various hardware and software issues.

Resolution:

In case of hardware issues, run hardware diagnostics and try to swap the old hardware components. However, if the error message persists even after changing the hardware component, then you will need to firstly run DBCC CHECKDB command – without any repair clause-to determine the extent of corruption. After complete analyses, you will need to run DBCC CHECKDB command with a repair clause.

Note: Performing a repair will rebuild the Index(s) and can result into loss of data.

In most cases, the DBCC CHECKDB resolves your issue and makes the records saved in the table accessible. However, the above command fails and no clean backup is available, then you will need to use advanced SQL database recovery tool to repair the database and access the records saved in the table. These SQL Repair applications incorporate high end scanning methods to scan the hard drive and repair the corrupted MS SQL database. These tools are developed by highly talented data recovery experts and easily understandable without any prior technical knowledge.

Stellar Phoenix SQL Recovery is a fully-featured SQL Repair software ensures absolute recovery of databases created in SQL Server 2008, 2005, and 2000. The read only tool provides recovery of almost all MS SQL database objects, like views, triggers, stored procedures, and more. The application is designed for Windows Vista, XP, 2003, 2000 and NT.

Filegroups in Microsoft SQL Server are primarily used to group database files to use them in an easy and simple way. A system administrator can create particular filegroups for each hard drive attached in the system and assign tables, indexes, text from a particular table to them. While these filegroups can be easily accessed, the possibilities of their corruption always remains. In such situations, the best way to access the data is by restoring it from an updated and valid backup. However, in case of no backup availability or backup failing short of restoring the desired information, then you will need to use advanced SQL Database Repair software that can completely repair your corrupted database and recover its components.

Consider a practical instance, where you receive the below error message when you attempt to open your SQL Server database:

“Unable to process index I_NAME of table O_NAME because filegroup F_NAME is invalid.”

Cause:

The root cause for the occurrence of the above error message is that filegroup Ids stored in the metadata for an index do not exist, so that index can not be checked.

Resolution:

Below are certain resolutions that enable you to resolve the above error message:

Error 2522 could be a result of hardware malfunction. In this case, you will need to check your computer system, Windows error logs, and SQL server. To resolve the hardware problem, you will need to swap the old hardware components with new hardware components.
However if the error message is not occurring due to hardware problems, then you can restore the database from an updated backup.
But if in case, you have not maintained any backup, then you will need to execute the DBCC CHECKDB command to repair the corrupted database.

In most cases, the above resolutions resolve your issue and your SQL database becomes accessible. But, if all the above resolutions fall short and the error message still remains, then you will need to use advanced SQL Database Repair application that can repair your corrupted database. Such SQL Repair tools use high-end scanning methods to repair the corrupted database. Built with highly interactive user-interface, these tools are easily understandable without any prior technical knowledge.

Microsoft SQL Server is the most popular and advanced Relational Database Management System (RDBMS), which is developed and marketed by Microsoft Corporation. The SQL Server enables you to use the T-SQL (Transaction Structured Query Language) to carrying out database transactions. T-SQL can be created to effectively manage SQL Server and to prevent unauthorized access of the database. SQL Server stores all of the data in MDF (Master Database File) in the form of several different tables. In some situations, these tables might get damaged and thus become inaccessible. This behavior of MS SQL Server cause critical data loss situations and require SQL database repair to be sorted out.

Due to the advanced features, which SQL Server offers, there are several organizations who use it for effective management of their databases. But your decision of use the MS SQL Server might prove wrong when you can not get access of your mission critical data. In some situations, when you attempt to access the SQL Server database, you come across below given error message:

“Server can’t find the requested database table”

After this error message, you can not access the require database table and thus face data loss situations. In these cases, to get your mission critical data back, you need to sort out this issue by performing SQL Repair.

Grounds of the issue

The major reason behind the occurrence of this error message is corruption to the SQL Server database. The database might get damaged due to a wide range of reasons such as improper system shutdown, virus infection, application errors and many alike.

If the SQL Server database, which has got damaged, isn’t so complicated and does not contain huge amount of data and objects, then you can rebuild the database easily. However, if the database is very large and complex, then you will have to go for SQL repair to retrieve data from damaged database.

The recovery is best possible with the help of powerful and advanced third party applications, which repair and restore damaged database. The SQL Repair applications carry out thorough scan of the damaged database and retrieve all of the data from it. With self-descriptive and interactive users, these applications are completely easy to use. These tools are completely safe as they have read only and non destructive conduct.

Stellar Phoenix SQL Recovery is the most efficient application to ensure absolute and easy recovery of damaged MDF files. This software works well with Microsoft SQL Server 2008, 2005 and 2000. This software is compatible with Microsoft Windows Vista, 2003, XP, 2000 and NT.

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SQL Server 2005 (Enterprise and Developer editions) supports a unique feature of table partitioning; using which you can increase the performance of large databases. Partitioned tables are flexible, easy to maintain and give high performance. DBCC CHECKTABLE command can be used to check the consistency of such tables. If you run this command and get errors, the table might be corrupt. To restore complete information, you should use your last database backup. But if you observe backup with errors or don’t have any backup, scan your damaged database using SQL database repair software.

Consider a practical scenario, you are using two partitioned tables (Table A and Table B), both having the same columns and partitioned against the same column. You create a clustered index on Table B and drop it and then switch a partition from TABLE A to TABLE B. After this, you import valid data to TABLE B using BULK INSERT command with TABLOCK option. This corrupts the data and when you run DBCC CHECKTABLE command to check the consistency of such table, you receive the similar error message:

“Msg 2570, Level 16, State 3, Line 2
Page (PageID), slot SlotID in object ID ObjectID, index ID IndexID, partition ID PartitionID, alloc unit ID UnitID (type “In-row data”). Column “ColumnName” value is out of range for data type “DataType”. Update column to a legal value.”

You might also receive error with ID 8984 or 8988.

Cause

The above behavior is observed due to mismatch between metadata of the two tables. When you drop the clustered index of TABLE B, its metadata gets changed. After this, when you switch the partitions between tables, the metadata information gets mismatched and you receive data corruption errors, as above.

Solution

Follow these methods to correct data corruption issues:

· Run DBCC CHECK TABLE command with repair options
· If problem persists, delete the damaged table if you have valid database backup
· In case of no backup availability or backup invalid state, make use of commercial SQL Repair applications. These are recommended SQL Recovery applications that safely repair damaged SQL databases. Also, they provide interactive interface.

Stellar Phoenix SQL Recovery is the finest tool to repair damaged SQL Server databases. It supports SQL Repair for SQL Server 2000 and 2005. This software provides self-descriptive interface and restores all database objects including tables, user defined data types and functions, stored procedures, triggers, views, rules and others. This SQL Recovery software is compatible with Windows Vista, XP, 2003, 2000, and NT.

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In SQL Server database, the indexes are primarily organized as B-trees. Every page in an index B-tree is known as Index node. These B-trees enable you to effectively handle your data saved in tables and indexes. While these B-trees allow you to properly manage your data, corruption or damage in them can also result into inaccessibility of records saved in the SQL database. In such situations, an easy way to access your data is by restoring it from an updated database backup. However, if no backup is available or backup file(s) itself gets corrupted, then you will need to use advanced SQL database repair tool to repair your database.

As a practical case, you encounter the below error message when you attempt to access the records saved in your Finance database:

“Object ID O_ID, index ID I_ID: Page P_ID is empty. This is not permitted at level LEVEL of the B-tree.”

Data stored in the Finance database becomes inaccessible after the above error message appears. Furthermore, the above error message repeatedly occurs each time you attempt to access the records saved in the Finance database.

Cause:

The root cause for the occurrence of the above error message is the B-tree above the leaf level is empty or corrupted. This further corrupts the table indexes and makes their data inaccessible. Corruption can occur due to logical or physical factors.

Resolution:

To resolve the above error message, you will need to follow the below measures:

· In case of corruption caused due to hardware failure, you will need to run hardware diagnostics and swap the damaged hardware components with new ones.

· In case of logical database corruption, you will need to run DBCC CHECKDB command (without repair clause) to identify the extent of Finance database corruption. After identifying the corruption, run DBCC CHECKDB command with appropriate repair clause.

However, if DBCC CHECKDB with repair clause fails to resolve the issue, then you will need to opt for third party SQL database recovery tool. These SQL repair are developed by highly talented data recovery experts and provide risk-free database repair.

Stellar Phoenix SQL Recovery is an effective SQL Repair software to repair databases created in SQL Server 2008, 2005, and 2000. Designed for Windows Vista, XP, 2003, 2000 and NT, the tool recovers MS SQL database objects, like views, triggers, stored procedures, and more.

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DBCC CHECKDB commands allow checking logical and physical SQL Server database integrity. When used with REPAIR_ALLOW_DATA_LOSS argument, it repairs all reported errors, but with the possibility of data loss. The corrupted data gets deleted in the process. But at times, when you run DBCC CHECKDB command with REPAIR_ALLOW_DATA_LOSS argument, database corruption is reported as fixed though is not corrected. In such situations, you can use your recent data backup to restore the database. But if the backup fails to restore or is not present, you need to scan your damaged database with powerful SQL Recovery applications.

Consider a practical instance, you scan your SQL Server 2000 database and get 8909 error, followed by a group of eight or more 8909 error messages:

Server: Msg 8905, Level 16, State 1, Line 1
Extent (1:192) in database ID 10 is marked allocated in the GAM, but no SGAM or IAM has allocated it.

Or

Server: Msg 8909, Level 16, State 1, Line 1
Table error: Object ID 0, index ID 0, page ID (1:192). The PageId in the page header = (0:0).

Further, you use DBCC CHECKDB with REPAIR_ALLOW_DATA_LOSS option and it reports it as fixed. But again, when you run DBCC CHECKDB command to check database integrity, it reports the same error messages.

Cause

You encounter this issue when the following conditions are true:

•    You run DBCC CHECKDB on pages and extents that are allocated for sorting
•    Pages have field values such as Page type is set to SORT_PAGE (7), Index ID is 0 and Object ID is 0
•    You haven’t installed SQL Server 2000 Service Pack 2 or later.

Solution

To resolve the issue, you can follow any of these methods:

•    Install SQL Server 2000 Service Pack 2 and run DBCC CHECKDB command with repair_allow_data_loss option
•    Use DTS (Data Transformation Services) and transfer the database out.

If the above measures don’t help or the database still appears to be corrupt, you need to use efficient third-party repair sql applications. These are the commercial tools provided to scan and repair damaged SQL Server databases. You can use these SQL Recovery products in any case of SQL database corruption.

Stellar Phoenix SQL Recovery is the finest sql repair tool to scan and repair damaged or corrupt SQL Server databases. The software performs safe repair operations and restores all database components. It is compatible with SQL Server 2005 and 2000. The software supports Windows Vista, XP, 2003, 2000 and NT.

Sometimes you may face system or hardware problems while writing data to or reading from the SQL Server 2000 database. These issues can make your database inaccessible and cause serious data loss. In such situations, all your critical data becomes unusable and you need to opt for SQL Database Recovery.

While reading from or writing to the SQL Server database, you might encounter the below error message:

“Error 823
I/O error <error> detected during <operation> at offset <offset> in file ‘<file>’”
This error message may occur every time when you start SQL Server and access the MDF file.
Root of the issue
Microsoft SQL Server 2000 displays this message when any of the below given conditions are true:
.    Operating system problem: A read Windows API (Application Programming Interface) call or write API call isn’t successful and MS SQL Server encountered operating system error which is related to API call.
.    I/O logical check failure: This behavior may occur if the read API or write API is successful but particular logical checks on database are unsuccessful. This situation prevents SQL Server to access data from MDF file.
.    MDF Corruption: This problem may occur if your MDF file is corrupted and thus SQL Server can not recognize the file and access data from it. This behavior causes serious data loss.
Resolution
There are three possible solutions of this issue:
.    If the problem is due to operating system error then you need to fix the Windows API issue. It may require repair or reinstall.
.    Use DBCC CHECKDB command to check any logical errors in the database. It is an in-built command in SQL Server to fix application level errors.
.    Use SQL Database Repair software to scan the corrupted database and recover all the inaccessible data from it.

These software are specifically designed to repair sql database in most of the corruption scenarios. These software come equipped with interactive graphical user interface and thus allow you to have ‘Do It Yourself’ recovery.

These software can recover all the MDF file objects including tables, reports, triggers, stored procedures, constraints, indexes, views etc. They provide absolute results with their read-only and non-destructive design.

Stellar Phoenix SQL Recovery is a robust tool that can repair sql database in almost all corruption scenarios. This software is able to recover all the database objects from MS SQL Server 2005 and 2000. It is compatible with Microsoft Windows Vista, XP, 2003, 2000 and NT.

You may encounter functionality issues in SQL Server when any application that uses ADO (ActiveX Data Objects) interface connects to SQL Server. It may cause corruption to the MDF file and cause data loss. You need to perform SQL Recovery to repair and restore the affected database components.
The applications which use ActiveX Data Objects interface in following scenarios might experience functionality problems:
.    When the application connects to Microsoft SQL Server 2005, Microsoft SQL Server 2000 or SQL Server Desktop Engine (also called MSDE 2000).
.    Application uses ‘SET NOCOUNT ON’ statement for connecting with Microsoft SQL Server.
.    Application inserts a row in the table which has an identity column by using the Microsoft ActiveX Data Objects (ADO) client-side cursor.
In such situations, you may face MDF corruption that results into serious data loss.
Root of the issue
When the ADO application queries the identity column value or newly inserted row, value “0” is returned mistakenly. It might result into the application and SQL Server to malfunction and even damage the MDF file. Whether malfunction or corruption occurs totally depends upon how SQL Server and application tackles the scenario.
This issue occurs due to problems in MDAC (Microsoft Data Access Components) components of Microsoft Windows Vista and XP. This problem also takes place after you install hotfix 940569 on computers with MDAC 2.8 SP1 installed.
To make your lost database information accessible from the damaged MDF file, you need to perform sql repair. SQL utilities are uniquely designed applications for to-the-point repair and restoration of affected SQL database components.
It is the process of repairing and restoring corrupted MDF file and extracting all data from it. This is best possible using third party SQL Recovery tools.
These are powerful applications that are capable of scanning the corrupted MDF file and retrieving all of its objects like tables, views, rules, reports, triggers, indexes, stored procedures, constraints, defaults etc. These software are user-friendly applications with easy to understand graphical interface. No sound or prior technical skills are required to repair sql. A user can achieve safe and absolute database recovery by these SQL utilities.
Stellar Phoenix SQL Recovery is the most efficient and powerful SQL Recovery application. It can easily repair and restore corrupted MDF files and repair all MDF objects. It also recovers the backup files MS SQL Server. It is compatible with Microsoft SQL Server 2005 and 2000. It supports Windows Vista, XP, Server 2003 and 2000.