Resolving Error 5171 in SQL Database

SQL Server database file (MDF file) corruption or damage can occur due to SQL Server malfunctioning, improper server shutdown, virus infection, hardware failure and more. Once the SQL database gets corrupted, the SQL database can become completely inaccessible. In such situations, if there is no backup available, the user needs to perform SQL database repair by using advanced SQL Repair application.

Consider a practical scenario, where a user is working on SQL Server 2005 and creating a report. While doing so, the Windows server restarts due to power failure and the user encounters an abrupt server restart screen prompting for the reason and information. Due to the operating system issue, the SQL database becomes inaccessible. When the user tries to attach the MDF manually, he encounters the below error message:

“An exception occurred while executing a Transact-SQL statement or batch. <database name>_db.mdf is not a primary database file. (Microsoft SQL Server, Error: 5171).”
Or

“C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\MYDATABASE.mdf is not a primary database file. (Microsoft SQL Server, Error: 5171)”

In such circumstances, the database administrators recommend to attach a single file. However, when the user uses sp_attach_single_db Stored Procedures, the user encounters the following error message:
“Server: Msg 5172, Level 16, State 15, Line 1
The header for file path”"\.mdf is not a valid database file header. The PageAudit property is incorrect.”

Cause:

The main cause of the above error message is MDF file corruption. The above issue occurs when the MDF file header gets corrupted or due to insertion of some invalid information in the header file. All these situations result in inaccessibility of the SQL database. To ensure complete accessibility of the SQL database, the user needs to recover it from the latest backup. But if the user has not created any backup of the inaccessible MDF file, then he needs to perform MDF repair. To do so, the user needs to use effective SQL Repair application. Such applications incorporate advanced and powerful scanning methods to repair the corrupted MDF file. The recovery software perform systematic scan of corrupted MDF files, repair and restore them in their original format without altering any information.

Stellar Phoenix SQL Database Recovery is the most trustworthy SQL recovery software. This repair software can Repair SQL objects such as, tables, reports, forms, macros, database constraints, stored procedures, triggers etc. It supports SQL Server 2005 and 2000. It is compatible with Windows Vista, XP, 2003 and 2000.

Fixing “Cross object linkage” Error Message

Data stored in SQL Server database tables is divided into various number of partitions, maintained in either B-tree (non-clustered) or heap (clustered) structure. While in heap tree structure the data is not arranged in any specific order, the data in the B-tree structure is stored in one place and the Index in another. The data stored in the database table becomes inaccessible once the metadata structure gets corrupted due to any internal or external factor. In most of these situations, you encounter an error message while attempting to access the table data. To overcome such error messages, an easy way is to restore the data from an updated backup. But, no updated backup in hand or backup falling short to restore the required data, you will need to use advanced SQL Database Repair application.

Picture a situation where you receive the below error message, when you attempt to access the table records:

“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.”

Once the above error message pops up, the records stored in the database table becomes inaccessible because each time when you attempt to open the table, you can only view the error message. It is a severity level 16 error message.

The root cause for the above error message is that the page P_ID1 is pointing to a page P_ID2 in a wrong object. The above error message can occur due to logical or physical crash.

  • Two resolutions for the table error message, caused either due to logical or physical damage, are discussed underneath:To solve the table error caused after physical damage, change the damaged component of your system with a new component.
  • To resolve the table error post logical crash, run the DBCC CHECKDB command. (Remember the command should contain an appropriate repair clause).

However, if the above command fails, and you have not maintained any backup, then you will need to search for a third-party SQL Repair tool. Such SQL Database Repair tools are easy to understand and completely non-destructive in nature.

Fixing “Repairing this error requires…” Error Message

An error message while accessing MS SQL database pops up due to its corruption or damage. Various reasons, such as, metadata structure damage, SQL Server damage or improper shutdown, and virus attacks could be the main reason for corruption. In most cases, the fundamental cause for the error message is clearly mentioned. However, in some situations, if the cause is beyond your understanding, then it is always advisable not to perform any experiments. An easy way to overcome any error message, is by restoring the data from an updated database backup. But, absence of updated database backup leaves you with no option but to repair your corrupted database. To do so, you will need an advanced third-party SQL Database Repair tool.

To illustrate the above case, consider a scenario where you receive below error message when you attempt to access your SQL database records:

“Repairing this error requires other errors to be corrected first.”

Once the above error message pops up, it does not allow the database to mount, making all its records inaccessible.

Cause:

Corruption in SQL Server database.

Resolution:

As the error message states, the error can be resolved only by fixing another error message. The fixes are ranked in order to perform more pervasive fixes first. For instance, corruption in B-tree linkage is ranked higher in comparison to corruption of non-clustered index row. In such situations, fixing the B-tree linkage will also resolve the damage in non-clustered index row.

However, the probabilities for the above resolution being 100% accurate are very rare. In such situations, the repairing of the SQL database can be easily performed by using SQL Database Repair tool that provides comprehensive repair of corrupt database.

SQL Repair tool performs advanced scanning of the corrupt database and repairs it to maximum possible level. The tool is built with interactive user-interface, which allows even the non-technical users to perform the database repair. In addition, these tool do not overwrite or modify the original data, making the repair process safe and risk-free.

Stellar Phoenix SQL Recovery is capable of repairing SQL databases to a level where no other application can. The SQL Database Repair tool uses powerful scanning methods to repair databases created in SQL Server 2008, 2005, and 2000. Supported by Windows 7, Vista, XP, 2003, 2000 and NT, the tool provides an option store the repaired database on default or new destination.

Fixing “Extent E_ID is allocated…” Error Message

The physical database structure of Microsoft SQL Server contains various types of components, arranged into systematic order. The data stored in the SQL database file is divided into number of pages numbered from 0 to n. Collection of eight continuous pages forms an extent (top-most hierarchical component). Corruption in extent primarily results into an error message while mounting of your database. This error message results into unmountability of database, which further leads to inaccessibility of its stored information. To surpass the issues created after extent corruption, most of the database users prefer to restore the database from an updated backup. But, the probability of every database user maintaining a regular backup is very rare. In such cases, these users need to repair there corrupt database using advanced SQL Repair application.

As a practical case, your SQL database becomes unmountable after the below error message appears:

“Extent E_ID is allocated to ‘OBJECTNAME’ and at least one other object.”

Repetitive occurrence of the above error message makes the data stored in your database inaccessible.

Cause:

The above error message appears when there is some corruption in Extents. This can either happen due to logical or physical damages.

Resolution:

The solutions for resolving the above error message ” caused either through logical or physical damage ” are discussed below:

  • The physical damages can be surmounted by replacing the physically damaged system component with a new one.
  • The logical damaged can be surpassed by executing DBCC CHECKDB command, with an appropriate repair clause.

The failure of both the above resolutions leaves with no option, but to restore data from an updated backup. However, in case of unavailability of an updated backup or backup falling short of restoring the updated backup, you will need to use advanced SQL Repair application.

A SQL Repair software uses high end scanning methods to repair the corrupt SQL Server database. With interactive user-interface and non-destructive nature, these tools are easy to understand and perform safe database repair. There is no need for any technical skill to use these repair tools.

Stellar Phoenix SQL Recovery is competent enough to repair corrupt SQL database to a level unmatched by any other repair application. The SQL Database Repair software repairs SQL Server 2008, 2005, and 2000 databases and restores them on default or new user specified location. The software is designed for Windows 7, Vista, XP, 2003, 2000 and NT operating systems.

Fixing “Incorrect PFS free space information…” Error Message

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.

Resolving “Forward row mismatch” Error message

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.

Tips to Resolve “Table error: Page P_ID…” Error Message

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.

Tips to resolve “Unable to process index…” Error message

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.

Resolving “Server can’t find the requested database table” Error in SQL Server

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.

Partitioned Table Corruption Error in SQL Server 2005

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
age (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.