MSSQL Database Recovery

An error message while trying to mount the database might leave you in a state of shock. While the reasons for the occurrence of the errors could be many, the outcome for most of the error messages remains the same – inaccessibility of database records. One common reason for the occurrence of the error message could be corruption of sysfilegroups table. A sysfilegroups table consists of one row for each filegroup in your SQL Server database. The table is saved in each SQL Server database and there contains at least one entry for primary filegroup. For complete access of database records after sysfilegroups table corruption, an ideal way is to restore the data from an updated backup. However, if no backup is available or backup falls short to restore the required records, start looking out for an advanced SQL Recovery tool that can recover your lost data.

Consider a practical example, where you encounter the below error message when you encounter the below error message when you attempt to mount your database:

“Unable to process table O_NAME because filegroup F_NAME is offline.”

Database records become inaccessible after the above error message pops up. Additionally the database becomes inaccessible after the above error message appears.

Cause:

Three main causes for the occurrence of the above error message are:

· Corruption or damage in sysfilegroups table.
· The file group might have been marked offline erroneously.
· Some database user could have intentionally marked the file group offline.

Resolution:

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

· In case of file group offline, make it online.
· In case of sysfilegroups table corruption, execute the DBCC CHECKFILEGROUP statement with appropriate clause.
· If the error message still appears, restore the data from a valid backup.

However, in case of absence of an updated database backup, you will need to opt for advanced third party SQL Recovery software. Such SQL Database Recovery tools ensure complete database repair and recovery of lost database components. With an easy-to-understand user-documentation, these tools can be used both by technical and non-technical users.

Stellar Phoenix SQL Recovery comprehensively recovers almost all SQL Server database objects, such as, views, triggers, stored procedures, etc. Designed for Windows Vista, XP, 2003, 2000 and NT, the SQL Database Recovery tool repairs and restore SQL Server 2008, 2005, and 2000 databases.

A warning error message while accessing the records stored in your MS SQL database occurs when the database is corrupted or there is a possibility of database being corrupted. While it is advisable not to access your data after any warning message, most of the database users tend to ignore such error messages. The best way to resolve all the warning messages is by using the restoring the database records from most recently valid database backup. But if in case, the database backup is not available or backup falls short to restore the database, then you should opt for advance third-party SQL Recovery tools that can repair your corrupted database.

Consider a practical scenario, where you encounter the below error message each time you attempt to access your SQL database components:

Warning: Page P_ID, slot S_ID in Object O_ID Index I_ID Column COLUMN_NAME value COLUMN_VALUE is out of range for data type “DATATYPE”. Update column to a legal value.

Note: Frequent occurrence of the above error message might corrupt your database to a large extent, making it totally unrepairable.

Cause:

The above error message occurs when the column specified contains an illegal value. This occurs when your database gets corrupted due to logical or physical factors.

Resolution:

For complete resolution of the above warning error message and repair of corrupted database, you will need to follow the below steps:

· In case of corruption due hardware failure, examine the Microsoft Windows system and application logs. These logs help you determine the damaged hardware. Swap the damaged hardware with a completely new hardware component.

· For logical corruption scenarios, you will need to run DBCC CHECKDB command (with recommended repair clause) to repair your database.

In most situations, the warning message does not appear after taking the above steps. However, if the warning message persists, then you will need to search for a professional SQL Recovery software. Such SQL Database Recovery software completely repair your database by using intensive scanning methods. The software comes with an installation guide that guides you through an easy to understand database repair procedure.

Stellar Phoenix SQL Recovery is an outstanding software that comprehensively repairs database created in SQL Server 2008, 2005, and 2000. The SQL Recovery tool recovers all database components like, views, triggers, stored procedures, etc. It stores the repaired database on a new location, leaving the original database file unmodified.

A Microsoft SQL database can be marked “Suspect” under various scenarios, like corruption of database file(s), unavailability of database file(s), operating system is holding a database resource, or entire database is not available. A suspect state of the SQL database can be easily identified with the occurrence of an error message. The error message primarily results in halting the mounting process of the database making the data stored in the database inaccessible. In such situations, an ideal way to access the database records is by restoring the data from an updated backup. However, in absence of an updated database backup or backup falling short to restore the required data, you will need to use advanced SQL Recovery software.

Below is the error message that appears when your SQL database is marked suspect:

“96/11/18 10:48:32.60 kernel udopen: Operating System Error 32 (The
process cannot access the file because it is being used by another
process.) during the creation/opening of physical device,
C:\DATA\SQL\MSDB.DAT (or C:\DATA\SQL\MSDB.MDF)
96/11/18 10:48:32.60 kernel udactivate (primary): failed to open
device C:\MSSQL\DATA\MSDB.DAT (or C:\DATA\SQL\MSDB.MDF) for vdn 127”

The database records become inaccessible after the above error message appears. In addition, the above error message repeatedly occurs each time you attempt to start your database.

Cause:

Few causes for the occurrence of the above error message are discussed below:

· Missing device file
· Database file(s) corruption
· Database not available

Resolution:

To resolve the above error message and access your database records, you will need to follow the below measures:

1. In case of missing device, you will need to ensure that the device file is available.

2. In case of database corruption, follow the below measures:

· Drop and re-create all the Index(es) of your database

· Copy all the recoverable records from an existing table and paste into a new table

· Update statistics

· Run DBCC UPDATEUSAGE command

· Run sp_recompile

If your database is still marked suspect even after following the above measures, and there is no backup available, then you will need to search for efficient third-party SQL Recovery tool. Such SQL Database Recovery software are easily understandable without any prior technical skills.

Stellar Phoenix SQL Recovery comprehensively repairs SQL Server 2008, 2005, and 2000 databases and recover almost all database components such as, views, triggers, stored procedures, etc. The SQL Database Recovery tool is designed for Windows Vista, XP, 2003, 2000 and NT.

Sometimes, when you attempt to open the MS SQL database, you encounter an error message. The error message primarily occurs when the database gets damaged or corrupted. Few main reasons for corruption of database are improper system shutdown, application malfunction, virus attack, and human errors. The error message halts the mounting process of your database and makes the data stored in it inaccessible. To overcome the problems created by error message, an ideal way is to restore data from an updated backup. However, in case of database backup unavailability or backup falling short to restore the required data, the only option left is to repair your corrupted SQL database using a powerful SQL recovery software.

As a practical scenario, you encounter the below error message when you attempt to open corrupted MS SQL database:

“Error: 0×80004005 E_FAIL
Minor Error: (25017)
Description: Unspecified Error”

The error code is SSCE_M_DATABASECORRUPTED (database file or non-database file corrupted).

Additionally, when you use CompactDatabase method to resolve the corruption, you further encounter another error message:

“Error: -2147467259
Compact”

The same error message appears each time you attempt to open your database. Furthermore, the data stored in your database becomes inaccessible after the above error message appears.

Cause:

The fundamental basis for the occurrence of the above error message is the corruption of your SQL database. Therefore, the engine ActiveX code for CompactDatabase method aborts when it attempts to initialize the source database.

Resolution:

To resolve the above error message, you will need to obtain the latest service pack of SQL Server 2000 Windows CE Edition. In most cases, the above resolution resolves the above problem and makes the database accessible.

However, if the above persists even after installing the latest service pack, then you will need to use powerful SQL database recovery software to repair the corrupted database. Such SQL Repair tools employ effective scanning procedures to scan and repair the corrupted MS SQL database. With to-the-point user-documentation and interactive user-interface, these tools serve as self-explanatory and repair-centric applications.

Index is the most critical component of a relational database. It ensures easy, quick and managed accessing of data from the database. In Microsoft SQL Server, a non-clustered index is an index that stores both logical and physical order of indexes and tables. But in case of corruption if the logical order of index doesn’t match the physical order or rows on hard drive and thus you can not access data from the database. This situation generally occurs due to index corruption, which could be the outcome of self-update query, virus infection, improper system shutdown and may others. At this point, the database become inaccessible and you encounter data loss situations. To retrieve data in such cases, you are required to go for SQL Recovery using appropriate tools.

In a practical scenario, when you carry out any operation using self-update query on master table after which non-clustered index gets damaged or corrupted. Additionally, you encounter any of the below given error messages while trying to access any database table or entire database:

“Server: Msg 8952, Level 16, State 1, Line 1
Table error: Database ‘badqueue’, index ‘repro.NC’ (ID 1828201563) (index ID 2). Extra or invalid key for the keys:”
Or
“Server: Msg 8956, Level 16, State 1, Line 1
Index row (1:308:2) with values (i2 = 369 and i1 = 1 and ? = 61) points to the data row identified by ().”

After above error message occurs, you can not access master table and thus stored data and require SQL Repair. The self-update query select over 3,000 rows of master table but not entire master table. To gain access of master table, you are recommended to download and use hotfix solution offered by Microsoft.

But even after applying the hotfix, you get same error message and can not access the database, you are required to repair and restore damaged database. This is best possible with the help of powerful and efficient third party applications, known as SQL Recovery tools.
These applications use high-end scanning mechanisms to methodically scan entire SQL Server database and retrieve all of its objects including tables, reports, forms, triggers, stored procedures and so forth. With interactive and rich graphical interface, they are quite easy to use. The SQL Database Recovery software do not alter original data in the database.

Stellar Phoenix SQL Recovery is the most excellent solution for SQL Database corruption issues. This read only repair application supports recovery from the MDF files of Microsoft SQL Server 2008, 2005 and 2000. This software is compatible with Microsoft Windows Vista, 2003, XP, 2000 and NT.

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BCP is the SQL Server utility that you can use to copy bulk data between a data file and instance of MS SQL Server. You can also use it to import/export data in/from SQL Server tables. But sometimes when you perform a bulk copy operation, it corrupts index pages of unique nonclustered index. It occurs when this operation results into duplicate rows insertion into a table. In such situations, you might receive an error message that the table is corrupt. Thus, to restore the missing information, you should use your last backup. It might occur that you don’t have such backup that could give required results. To cope up such problems, you can use powerful SQL Recovery software.

When you run DBCC CHECKTABLE command to check SQL table consistency, you might receive below errors:

Server: Msg 8951, Level 16, State 1, Line 0
Table Corrupt: Table ‘table_name’ (ID 1797581442). Missing or invalid key in index ‘IDX_2′ (ID 2) for the row:

Server: Msg 8955, Level 16, State 1, Line 0
Data row (1:97:0) identified by (RID = (1:97:0) ) has index values (Col1 = 1 and Col2 = 1 and Col3 = 12 and Col4 = Sep 30 2000 12:00AM!t©~0WeG).

Cause

The most probable cause of such error messages to occur is that you have used bulk copy operation that has corrupted index pages of unique nonclustered index. It occurs when bulk copy operation or DTS (Data Transformation Services) import package inserts duplicate rows into a table, when any of the following condition exists:

1. The input file you are using contains duplicate rows
2. The table to be targeted doesn’t contain any clustered index and contains a unique nonclustered index that has been created with ignore_dup_key option
3. You have turned on the Select Into/Bulk Copy option

Solution

Apply any of these methods to fix such issues:

1. You should clean the target table by dropping nonclustered index. You can then remove the duplicate rows and recreate the unique nonclustered index
2. If problem persists, you can use commercial SQL Repair software to repair and restore table contents. Since using DBCC CHECKTABLE command with repair option cannot correct this issue, using SQL database recovery software is the only way lefts.

Stellar Phoenix SQL Recovery is an advanced tool to repair and restore damage SQL databases and its components. It supports safe SQL Repair for SQL Server 2008, 2005 and 2000. It can restore database tables, triggers, stored procedures, views, rules and other database components. It is compatible with Windows Vista, XP, 2003, 2000 and NT.

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SQL Server database storage space is divided into pages, which are numbered sequentially. When you perform any operation, these pages serve as the basic I/O unit. Each of these pages is marked with a corresponding header (96-byte in size) that conveys information like page number, free space available, page type, object ID etc. If you run DBCC CHECKDB on database and it reports errors on database pages, the odds are that the page header is damaged. This leads to data inaccessibility and to restore lost information, you require using your recent data backup. However, if backup is damaged, not updated, or not available, you need to use SQL Recovery tools for safe repair and restoration.

Consider a practical instance, you run DBCC CHECKDB on your SQL Server database and get a series of error messages, similar to:

Msg 8939, Level 16, State 98, Line 1

Table error: Object ID O_ID, index ID I_ID, partition PA_ID, alloc unit ID AU_ID, page P_ID, Test (TEST) failed. Values are VAL1 and VAL2.

Cause

Error 8939 arises due to corruption in page header. One of the possible causes is hardware errors. The test that failed is defined in TEST string, while VAL1 and VAL2 are dependent upon error state.

Solution

To correct the above error, you need to follow these steps:

· You require examining system and application logs for hardware failures. Replace the affected hardware components. Also, you need to ensure that no write caching is enabled on disk controller (this is the issue when data corruption is observed frequently)

· Use your recent data backup to restore lost data.

· In case of valid backup unavailability, run DBCC CHECKDB command to determine corruption state and repair clause to be used. Next, you need to run DBCC CHECKDB with recommended repair clause. Note: This process results into data loss as the affected pages will be deleted.

· For safe SQL Repair, use commercial repair applications. SQL Recovery software are read-only, advanced, and automated software that scan damaged databases and restore them with original content and view.

Stellar Phoenix SQL Recovery is a comprehensive repair tool for damaged SQL Server databases. It supports SQL Server 2000 and 2005. This SQL Repair software is available with self-descriptive interface and restores all database objects (tables, user defined data types and functions, triggers, stored procedures, views, rules etc.). The software is compatible with Windows Vista, XP, 2003, 2000, and NT.

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When you use DBCC CHECKDB command on SQL Server database (MDF) file, you may face database inconsistency problems that could cause issues like database corruption. In case of corruption, SQL Server can not recognize the MDF file and thus data stored in it becomes inaccessible. To resolve MDF corruption issues, you need to repair and restore the MDF file using SQL recovery software.

The DBCC CHECKDB command might display error messages due to database inconsistency in your SQL Server database. It takes place when the underwritten conditions are true:

1. MS SQL Server loads data to the column which has a sql_variant data type.
2. The data gets created in another column which has a sql_variant data type and the data is sent on-the-wire by the SQL Server.
3. Data is sent either to an intermediate file or directly to another database server based on Microsoft SQL Server.
4. sql_variant column holds character values.

In case of database inconsistency, SQL Server may not work properly and data stored in the MDF file can not be accessed. Here are some examples of the SQL statements which could result into such behavior:

1. A BULK INSERT or BCP statement from the file which was originally created using SELECT statement or BCP IN command from the SQL Server.
2. Data load which is using the Data Transforming Services.
3. Data load which is using the SQL Server DMO Transfer Object.

In case of MDF file corruption, you may encounter the below given error message:

“Msg 2537, Level 16, State 43, Server MYSERVER, Line 1
Table error: Object ID 1977058079, index ID 0, page (1:75), row 0. Record
check (Valid SqlVariant) failed. Values are 4 and 0.
DBCC results for ‘MyTable’.
There are 0 rows in 1 pages for object ‘MyTable’.
CHECKDB found 0 allocation errors and 1 consistency errors in table.”

In case of corruption, MDF file repair is required to access data from the database. It is best possible using third party SQL Repair software. These software incorporate efficient scanning mechanisms to scan the damaged MDF file and extract all the data from it.

SQL Recovery software are result-oriented and easy-to-use tools that do not require sound or prior technical skills to achieve recovery of your precious data.

Stellar Phoenix SQL Recovery is the most advanced and powerful SQL repair application that ensures complete repair of your corrupt database (MDF) file. It supports Microsoft SQL Server 2005 and 2000. The software is compatible with Microsoft Windows Vista, XP, 2003, 2000 and NT.

The rows of a SQL Server table are divided into partitions that are numbered from 1 to n. By default all rows are consisted in a single partition, however one can also define the size of partition. All rows of partition are stored as a B-tree or heap structure. The actual data is stored in leaf nodes of leaves (called text data node), while rest other nodes (called text index nodes) are used to store index values for leaf node. But sometimes, you observe table inconsistencies because of mismatch between one or more child nodes and their corresponding parent nodes. As a result, you receive table corruption errors. Such situations need to be resolved using DBCC CHECKDB command, backup or commercial SQL Recovery utilities.

You might encounter the following error with your SQL Server database table:

Server: Msg 8961 , Level 23, State

Table error: Object ID O_ID. The text, ntext, or image node at page P_ID1, slot S_ID1, text ID TEXT_ID does not match its reference from page P_ID2, slot S_ID2.

Where, ‘state_number’ might be 1, 2 or 4.

Cause

SQL Server displays error 8961 when it finds mismatch between child node and parent node and corruption in a text object. Specifically, you might infer the exact cause of error message by the ‘state_number’ it is displaying:

State 1: It occurs when timestamps in node and parent don’t match with each other.

State 2: The child node is text data node and has greater size as what is supposed by its parent. It might also occur if the child node is text index node and has different size as what is supposed by its parent.

State 4: The child node is actually a text index node, but its parent supposes it to be a text data node or vice-versa. This might also occur due if the level of child node is different from what is supposed by its parent.

Solution

In order to solve such problems, you should follow these steps:

1. Check your system for possible hardware problems

2. Restore database from clean backup, if available

3. Execute DBCC CHECKDB command without using repair clause if no valid backup is available. Again run DBCC CHECKDB but with the repair clause suggested by the previous check

4. Running DBCC CHECKDB causes data loss. Thus, for safe SQL Repair, use third-party database repair applications. These SQL database recovery tools are built with powerful technology to safely scan and repair a damaged SQL Server database.

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

SQL Server includes a database check utility called DBCC CHECKDB. In SQL Server 2005, you can use this command with DATA_PURITY option enabled that allows you to perform ‘data purity’ validations on each column value in all rows of a table or multiple tables from the database. If you run this check and it outputs error messages that indicates problems with data and hence database integrity. In such situations, you need to use your recent backup to restore the lost information. But, if you find it invalid or inappropriate to deliver required results, SQL recovery tools can be used as a solution.

Consider a scenario, you check your database integrity using DBCC CHECKDB with DATA_PURITY option enabled and it gives the below error message:

“Msg 2570, Level 16, State 2, Line 1

Page %S_PGID, slot %d in Object %d Index %d Column %.*ls value %.*ls is out of range for data type “%.*ls”. Update column to a legal value.”

This error message occurs for every row that contains an invalid column value.

Cause

The above error occurs due to invalid data in a column of a table as invalid floating point values as SNAN, QNAN, NINF, ND, PD, PINF etc. It can also happen due to out-of-range data or hardware issues.

Solution

To correct the above issue, you need to follow any of the below methods:

· You should find the affected rows and manually update them with correct values. To do this, you can execute T-SQL (Transact-SQL) queries against the table or alternatively, refer to the information provided by error 2570. You can set it to any of acceptable default or specific value.

Note: You can’t run DBCC command to repair the database as it can’t determine

the value to be placed instead of invalid column value.

· In case if affected rows are large in number and it is not possible to update them manually, you can restore them from backup

· If the above measure is not feasible because of backup unavailability or corruption, you need to use mdf recovery applications to safely repair and restore your database. Such MDF Repair software use powerful scanning algorithms and offer advanced repair and restoration options together with interactive user interface.

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