Stellar Phoenix SQL Database Recovery Software

DBCC CHECKDB is a repair command used by MS SQL Server users to detect and repair their corrupt databases. The command can be used with various parameters, such as, repair_rebuild and repair_allow_data_loss. Although the command proves helpful in resolving all kinds of logical corruption issues, there are certain problems that persists even after using the above command. Such situations occur when the database is badly corrupted. An easy way to access data in case of severe corruption is by restoring the database from an updated backup. However, in case of no backup available or backup falling short of restore the required database, you will need to use a powerful third-party MDF Database Repair application.

Consider a real-time situation to describe the above problem. You attempt to mount your SQL database and see some consistency issues. To resolve these issues, when you run DBCC CHECKDB command, you encounter the below error message:

“Server: Msg 8929, Level 16, State 1, Line 1
Object ID 1979154096: Errors found in text ID 379493089280 owned by data record identified by RID = (1:647611:14) PK1 = 1300583.
Server: Msg 8929, Level 16, State 1, Line 1
Object ID 1979154096: Errors found in text ID 379544338432 owned by data record identified by RID = (1:648136:32) PK1 = 1300903.
…

Table error: Object ID 1979154096, index ID 255, page (1:558593). Test (IS_ON (BUF_IOERR, bp->bstat) && bp->berrcode) failed. Values are 2057 and -1.
Server: Msg 8965, Level 16, State 1, Line 1
Table error: Object ID 1979154096. The text, ntext, or image node at page (1:558593), slot 0, text ID 552407334912 is referenced by page (1:1387313), slot 46, but was not seen in the scan.
Server: Msg 8965, Level 16, State 1, Line 1
…

CHECKDB found 0 allocation errors and 33 consistency errors in table ‘QTI_RESULT_DATA’ (object ID 1979154096).
CHECKDB found 0 allocation errors and 33 consistency errors in database ‘bb_bb60′.
repair_allow_data_loss is the minimum repair level for the errors found by DBCC CHECKDB (bb_bb60 ).”

After the above error message gets displayed on the screen, the database records become inaccessible.

Cause:

The root cause for DBCC CHECKDB command to display the above error message is severe corruption of MS SQL database.

Resolution:

Below are some guidelines that help you to overcome the above error message:

·     Check if any system component is physically damaged. To do so, check the system, application, and SQL Server logs. Identify the component in the logs and swap it with a new component.

·     Run DBCC CHECKDB command with repair_allow_data_loss parameter. However, doing so might erase some of the critical data saved in your database. To avoid any situation, repair the database using an effective SQL MDF Repair application. Such MDF Repair tools can even be used by a non-database user.

Stellar Phoenix SQL Recovery is a powerful and advanced repair tool that comprehensively repairs  MS SQL Server 2008, 20005, and 2000 databases. The MDF File Repair supports Windows 7, Vista, 2008, XP, 2003, and 2000.

DBCC CHECKDB is a command that is mainly used to check the logical and physical integrity of MS SQL database. The command can be executed with three different parameters repair_allow_data loss, repair_fast, and repair_rebuild to repair an MS SQL database. While the command ensures absolute repair of logically damaged MS SQL database in most cases, there might be certain situations when this command fails to perform complete repair. Such situations occur when the corruption level of database is too high and beyond the limits of the command. However, a valid backup acts as a boon in such scenarios and allows the user to access the database. But if in case the user has not maintained any database backup, then the only way to repair the database is by using an effective third-party MDF Repair software.

To elaborate the above scenario, consider a practical case where your MS SQL database gets corrupted due to metadata structure damage. Now, when you execute the DBCC CHECKDB command (with repair_fast parameter) to repair your database, you encounter the below error message:

“DBCC results for ’sysindexes’.
The repair level on the DBCC statement caused this repair to be bypassed.
The system cannot self repair this error.
The repair level on the DBCC statement caused this repair to be bypassed.
The repair level on the DBCC statement caused this repair to be bypassed.
The repair level on the DBCC statement caused this repair to be bypassed.
The repair level on the DBCC statement caused this repair to be bypassed.
There are 1953 rows in 127 pages for object ’sysindexes’.
CHECKDB found 0 allocation errors and 6 consistency errors in table ’sysindexes’ (object ID 2).
DBCC results for ’syscolumns’.
There are 10093 rows in 218 pages for object ’syscolumns’.
DBCC results for ’systypes’.
There are 32 rows in 1 pages for object ’systypes’.
DBCC results for ’syscomments’. ”

The database remains in the corrupted state since the DBCC CHECKDB command is unable to repair the database.

Cause:

The database is severely corrupted and might require rebuilding of indexes or de-allocating of all the corrupt pages.

Resolution:

To overcome corruption of your database, the user needs to repair the database by running DBCC CHECKDB command with repair_allow_data loss parameter. While doing so might resolve the error message, it will also result into deletion of data from your database. To avoid any loss of data, you should opt for a commercial MDF File Repair application. Such MDF Repair tools do not overwrite or modify the original database during the repair process.

Stellar Phoenix SQL Recovery is an efficient, yet fast MDF File Repair tool that repairs databases created in MS SQL Server 2008, 20005, and 2000. The non-destructive tool retrieves almost all objects of SQL database. It supports Windows 7, Vista, 2008, XP, 2003, and 2000 operating systems.

SQL database corruption can occur due to SQL Server malfunctioning, virus infection, improper system shutdown, hardware failure and many more. Once the MS SQL database gets corrupted, the SQL database become inaccessible. In such situations, use you backup, if there is no backup, the user needs to repair mdf file by using advanced MDF Repair application. Consider a practical scenario, where a user is working on SQL Server 2005 and creating a report. While doing so, the Windows restarts due to power failure. When user restart the system, 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. _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 above error message encounters due to MDF file corruption. The above issue occurs when the MDF file header gets corrupted or some invalid information is inserted in the header file. All these situations result,  inaccessibility of the SQL database. To ensure accessibility of the SQL database, the user needs to recover it by using the latest backup. But sometime user has not created any backup of its database or mdf file, then he needs to perform MDF repair. To do so, user needs to use efficient and effective MDF repair application. Such mdf file repair applications incorporate advanced and powerful scanning algorithms to repair the corrupted MDF file. The mdf recovery software perform systematic scan of corrupted MDF files, repair and restore them in their original format without altering any information.

A table error while accessing a table in SQL Server 2000 database can occur due to various reasons like corruption in page header, incorrect alignment of system table, invalid page type, index_page page has an index zero, incorrect header modification, hardware failure, and more. While the reasons for table corruption might be many, but the result for all them remains the same – inaccessibility of table records. To access the table records without applying any extra efforts, you can directly restore the table from an updated database backup. However, if the database backup is not available or backup falls short to restore the data, then you will need to use advanced MDF Repair software to resolve the corruption and access the records.

As a practical scenario, you receive the below error message when you try to view the records stored in the table:

“Table error: Object ID O_ID, index ID I_ID, page P_ID. Test (TEST) failed. Values are VAL1 and VAL2.”

The error message re-appears each time you attempt to access the records saved in that table. In addition, the error message makes the records stored in the database becomes inaccessible.

Cause:

The various causes of the above error error message are discussed below:

· Damage in page header

· Incorrect alignment of system table

· Invalid page type

· Hardware Failure

Resolution:

· To resolve the above error message caused due to hardware failure, you will need to run the hardware diagnostics. Fix the hardware problems by by swapping the hardware components.

· To resolve the error message caused due to software failure, in case you have not maintained any database backup, you will need to execute DBCC CHECKDB command without a repair clause. This helps you to identify the exact cause for database corruption. After identifying the cause, execute the correct repair clause to repair the database.

Note: Running the DBCC CHECKDB command with repair clause might result into loss of data.

In most cases, the error message gets resolved after running the DBCC CHECKDB command. But if in case, the command fails to resolve the error message, then you will need to opt for powerful MDF Repair software. These MDF Database Repair applications use high end scanning methods to repair the corrupted SQL Server database and restore them on the user-specified location.

Stellar Phoenix SQL Recovery is a powerful MDF Database Repair software to repair and restore SQL Server 2008, 2005, and 2000 databases. With recovery of almost all SQL Server components (views, triggers, stored procedures, etc.), the software supports Windows Vista, XP, 2003, 2000 and NT operating systems.

A heap or clustered index in SQL Server is a way to effectively organize records saved in tables. These metadata structures enable the database user to increase retrieval speed of database records. While the heap index contains only the data pages, clustered index contains both index pages and data pages. Corruption in either of these indexes results in inaccessibility of all the database records. Few main reasons for index corruption are unexpected SQL Server shutdown, operating system malfunction, and virus attack. An easy way to surmount the problems created after index corruption is to restore the database from an updated backup. However, in case of database backup unavailability or backup falling short to restore the required data, the user needs to opt for an advanced third-party MDF Repair application.

Consider a practical scenario, where you receive the below error message when your try to mount your database:

“Table error: Object ID O_ID. The text, ntext, or image node at page P_ID1, slot S_ID1, text ID TEXT_ID is referenced by page P_ID2, slot S_ID2, but was not seen in the scan.”

The above error message repeatedly occurs each time you attempt mount your database. Additionally, your database records become inaccessible after the above error message appears.

Cause:

The above error message occurs when the text node in a complex column in any heap or clustered index is corrupted.

Note: Index corruption can occur either due to logical or physical damage.

Resolution:

There are different resolutions for resolving resolving both logical and physical crashes. These resolutions are discussed below:

· For physical damage, change the damaged system component with a new one.

· For logical crashes, run DBCC CHECKDB command (with correct repair clause).

The above two resolutions provide absolute recovery of database components in most situations. However, if the database remains corrupted after the above error message you will need to use effective MDF Recovery services or tools. While the MDF Repair services (for physical corruption) is performed by extremely talented data recovery experts, repair through MDF file repair tools (for logical corruption) can be easily performed any technical or non-technical user.

Stellar Information Systems Ltd provides both MDF Repair services and tools to repair database in both logical and physical corruption scenarios. Compatible with SQL Server 2008, 2005, and 2000, the software recovers all database objects, such as, tables, stored procedures, views, etc.

MS SQL Server database is build up of various metadata structure components like, pages, extent, etc. Pages are the smallest unit of data storage that store actual data. A combination of 8 adjacent pages makes an Extent. Corruption or damage in metadata structure primarily results in inaccessibility of records stored in your database. In most of the database corruption situation, you encounter an error message stating the cause for the error. For successful access of records stored in your database and overcoming  hazards created by error message, an easy way is to restore the database records from an updated backup. But if in case, your backup file has been corrupted, damaged, or unreadable, then you will need  to use advanced repair software that can comprehensively repair MDF files.

Consider a practical case, where you encounter the below error message when you attempt to access the records stored in your MS SQL Server database:

“Table error: Extent P_ID object ID O_ID, index ID I_ID is beyond the range of this database.”

The above table error message primarily results in inaccessibility of records stored in your database. Furthermore, the error message reappears each time you attempt to access the database.

Cause:

The fundamental reason for the occurrence of the above error message is corruption of metadata structure (in this case, Extents). Extent corruption can occur due to various reasons, such as, improper system shutdown, virus attack, human error, and more. Te corruption can also occur due to various physical damages in your hard drive, like accidental dropping of hard drive, natural disasters, power spikes, and more.

Resolution:

To stop the error message from occurring and to make your records accessible, you will need to use follow underneath steps:

•  In case of metadata structure corruption due physical crash of hardware, change the old hardware with new one.
• For metadata structure corruption caused due to logical crashes, run DBCC CHECKDB command (with recommended repair clause).

After using the above measures, there is a very dim possibility for popping of above error message. However, if it does, you will need to use a powerful MDF Repair software to repair your database. These MDF Repair tools are extremely user-friendly as they are built with highly graphical user-interface.

Stellar Phoenix SQL Recovery is a fantastic application to repair MDF file corrupted after any logical crash. The software supports SQL Server 2008, 2005, and 2000 and provides access to all your lost database components, such as, views, triggers, stored procedures, etc.

An SQL Server database table might get corrupted due to unexpected crash, virus infection, application bugs and similar reasons. To troubleshoot all such issues, you require using your backup, running DBCC CHECKDB command or scanning the database using MDF Repair utilities.

For an instance, you might come across the similar error as below with your SQL Server database table:

“Table error: Object ID O_ID, index ID I_ID, page P_ID, row ROW_ID. Record check (CHECK_TEXT) failed. Values are VALUE1 and VALUE2.”

This errors is recorded as 2337 in SQL log and is encountered in different states.

Cause

SQL Server has performed CHECK_TEXT to test the integrity of row ROW_ID that it has failed. The values VALUE1 and VALUE2 vary depending on the state of error message as described below:

• State 40: Value1 (length of column) is greater than Value2 (maximum length specified in metadata).
• State 43:

1. Value1 (variant column’s data length) is longer than Value2 (maximum length allowed of variant type)
2. Value1 is relational ID of column and Value2 is ). The error occurs due to check failure of computed or variant column.

• State 100: Value1 is invalid record type recorded on data page and Value2 is 0.
• State 101: Value1 (index record’s size) is greater than Value2 (maximum allowed size in metadata)
• State 401: Value1 is invalid record type recorded on index page and Value2 is 0.
• State 510: Value1 (number of child links in a node) is more than Value2 (possible space in child link array) for node type BLB_LARGE_ROOT_2, BLB_LARGE_INTERNAL or BLB_LARGE_ROOT
• State 511: Value1 (number of child links in a node) is more than Value2 (maximum fan-out defined)
• State 512: Value1( number of children in a text node) is larger than Value2 (available space)
• State 513: Value1 (minimum record length) cannot hold Value2 (BlobMan::DATA_NODE_HEAD_SIZE)

Solution

Use these methods to solve error 2537:

• Restore from backup if available
• Execute DBCC CHECKDB to know the required repair clause and run the same command with the suggested repair clause
• Since performing the above steps can cause data loss, use repair mdf file tools that allow achieving safe and complete SQL database repair results. MDF Repair utilities scan the damaged database and serve as most valid tools to restore it.

Stellar Phoenix SQL Recovery is an advanced mdf file repair tool that repairs and restores damaged SQL Server database created with SQL Server 2008, 2005 and 2000. It is a comprehensive database repair product for all database objects and is embedded with unique set of features. It is compatible with Windows Vista, XP, 2003, 2000 and NT.

SQL Server allows you to use a LSN (Log Sequence Number) that can be used as a recovery point for database restoration before the point of failure. When you perform differential backup process for your database, it is dependent upon a bitmap page that holds a bit per extent. Thus, corresponding changes are required to be marked in this differential backup bitmap or else will generate errors in database pages. You might need to restore the damaged database from the latest backup present. But sometimes, you don’t get complete restoration results from your backup as it is incomplete or invalid. In such situations, you should use advanced MDF Repair tools that use powerful scanning algorithms to repair damaged SQL Server database.

As an instance, you might receive the below error with your SQL Server database:

Server: Msg 2515, Level 16, State 1
Page P_ID, object ID O_ID, index ID I_ID has been modified but is not marked modified in the differential backup bitmap.

Cause

The above error is a result of database check that is performed only if the differential bitmap is free from errors. The error suggests that the page specified with P_ID has a Log Sequence Number and has got a higher value than differential base Logic Sequence Number in FCB (File Control Block) of file or differential reference Log Sequence Number in BackupManager (whichever is the more recent value). The error occurs when this change has not been marked in differential backup bitmap. Since repair process doesn’t depend upon the number of pages included in the database, the P_ID refers to the first page of database.

Solution

To recover from such situations, you need to deploy these methods:

.Check and fix your system for possible hardware issues through Windows, application and SQL Server™ error logs
.Restore the damaged database from the latest backup available
.Run DBCC CHECKDB without using any repair clause to determine extent of corruption and repair clause. Next, again execute DBCC CHECKDB but with the suggested repair clause. But this might cause data loss
.For safe repair mdf file, use commercial tools to repair and restore damaged SQL databases. MDF Repair tools are built with powerful technology and provide you self-explanatory user interface and safe repair options.

Stellar Phoenix SQL Recovery is an advanced mdf repair utility to repair damaged databases created with SQL Server 2008, 2005 and 2000. It is a fully-competent tool that restores all database components including triggers, stored procedures, views, rules and more. It is compatible with Windows Vista, XP, 2003, 2000 and NT.

A SQL Server file is consisted of different pages that store its allocation structures. The Global Allocation Page (GAM) is the one that contains information related to allocated extents in this file. Whereas, the allocation pages that contain information of the extents that an index or table uses are termed as Index Allocation Map (IAM) pages. Sometimes, you get errors that it has found multiple IAM pages for a single object. Such errors usually indicate table corruption that needs to be repaired or restored from backup. In absence of clean backup, you should use MDF Repair tools.
You might encounter the following error with your SQL Server database table:
Server: Msg 8947, Level 16, State 1
Table error: Multiple IAM pages for object ID O_ID, index ID I_ID contain allocations for the same interval. IAM pages P_ID1 and P_ID2.

Cause

The error message suggests that the IAM chain for the specified index has minimum of 2 IAM pages (referred as P_ID1 and P_ID) and cover the same GAM interval.

.    By interval, it means the file space that GAM page uses to map, which is approximately calculated as 4 GB. Each index having more than one extent that is allocated from a GAM interval is required to have an IAM page for that particular GAM interval. For all extents of GAM interval, an IAM page contains one bit for each extent. A set bit indicates that the particular index is allocated to that index.

One of the common reasons for this behavior to occur is hardware failure.

Solution

You need to perform these methods to recover from the situation:

.    Ensure that no hardware failure issue exists. Run hardware diagnostics and check application, Windows and SQL Server™ error log to know the exact issue. Replace the damaged hardware, if needed
.    If clean backup is available, restore from the database from it
.    If no valid backup is present, run DBCC CHECKDB command without using any repair clause to know the extent of corruption and repair clause required to be applied. Execute DBCC CHECKDB with the suggested repair clause
.    If above measures fail, scan the database using advanced mdf file repair tools. These are powerful SQL database repair applications designed to offer safe and effective MDF Repair.

Stellar Phoenix SQL Recovery is a premier tool to repair damaged SQL databases. It supports SQL Server 2008, 2005 and 2000. With self-descriptive interface, advanced repair options and read-only design, it is an advanced repair mdf tool to repair all database objects. The software is compatible with Windows Vista, XP, 2003, 2000 and NT.

SQL Server database is a set of tables and can also comprise stored procedures, constraints, views, indexes and transaction log files. A database storage space is basically divided into several pages, which serves as the basic unit of all I/O operation in SQL Server. Each of these pages is assigned with a 96-byte header that is responsible for holding all the metadata information of the page. All the data of database are stored in MDF files. But sometimes, you observe SQL Server log giving some sort of errors. It might indicate that your SQL Server database is affected from corruption and requires restoring from backup. But in case of unavailability of backup, you should use mdf file repair tools, which use powerful file repair algorithms to fix SQL database corruption.

While using and accessing your SQL Server database, you might receive the similar error message:

Msg 2540, Level 10
The system cannot self repair this error.

Cause

This error message indicates that SQL Server has encountered an error that could not be automatically repaired by its check code. Such kinds of errors include:

.     Metadata corruption
.    Corruption of PFS pages
.    One or more system files corruption

.    PFS or Page Free Space pages are responsible for holding allocation status for each database page. They record information like whether the page has been allocated for storage or not, the amount of fee space available on each page etc.

Such issues might arise due to hardware issues.

Solution

Follow these methods to fix 2540 errors with SQL Server database:

.    Diagnose your system for hardware issues
.    Check if all system files are healthy. Reinstall the system, if required
.    Restore the database from the recent backup, if present and is valid
.    If no clean backup is available, run DBCC with repair option. But it can cause data loss as the process deletes the corrupted pages
.    For safe MDF Recovery, use third-party tools of SQL database recovery

MDF Repair software are appropriate tools to scan and repair damaged SQL Server databases. Using powerful and safe scanning algorithms, they avail effective database recovery.

Stellar Phoenix SQL Recovery is an advanced and safe application that can effectively scan and repair damaged SQL databases. It is a complete mdf repair solution that can repair and restore all database objects like tables, rules, stored procedures etc. The application is compatible with SQL Server 2008, 2005 and 2000. It is a graphically rich application that offers advanced repair options.