MSSQL Database Recovery

Are you facing Access Violation error in MS SQL Server? Are you unable to access the database and its objects? Access Violation is a situation where application can not access the data because the data is either damaged or the application does not own the data. In both the cases, your database remains inaccessible and unusable. This behavior may lead to significant data loss and needs SQL Database Recovery to be fixed.

In a practical scenario, consider:

1 In MS SQL Server 2008, a query contains the following clauses:
Union all
Group by
Inner join
2 The database query uses parallel execution plan.
3 You execute the query.

In this case, you may come across an Access Violation. Additionally, you may encounter the below error message:

Location: xbmp.cpp:2038
Expression: 0 != pxteBitmap
Msg 3624, Level 20, State 1, Line 2
A system assertion check has failed. Check the SQL Server error log for details. Typically, an assertion failure is caused by a software bug or data corruption. To check for database corruption, consider running DBCC CHECKDB. If you agreed to send dumps to Microsoft during setup, a mini dump will be sent to Microsoft. An update might be available from Microsoft in the latest Service Pack or in a QFE from Technical Support.
Msg 0, Level 20, State 0, Line 0
A severe error occurred on the current command. The results, if any, should be discarded.

After the above error, database can not be accessed. In order to gain access of your SQL Server database, you need to carry out SQL Server Recovery by fixing this behavior.

As stated in the error message, you may have encountered such situations due to application malfunction or database corruption. Database corruption may occur after virus infection, unexpected system shutdown, operating system malfunction, and other similar situations.

Consider running DBCC CHECKDB command to get your database repaired. It is an inbuilt utility in SQL Server that checks integrity and consistency issues of MDF (Master Database File).

However, if this tool can not fix the problem, third-party MS SQL Recovery software are always there for your help. These are advanced tools, which methodically scan entire database and ensure absolute SQL Recovery in most of the database corruption situations.

Stellar Phoenix SQL Recovery is the most efficient tool to ensure absolute recovery of your damaged database. The software works well with Microsoft SQL Server 2008, 2005, and 2000. It restores all database objects such as tables, reports, forms, queries, stored procedures, triggers, and constraints.

Database corruption after unexpected system shutdown is a common scenario happened to almost all of us. The database becomes unmountable, further resulting in inaccessibility of records, after being corrupted. In most of these situations, you receive an error message that describes the exact cause of corruption, and sometimes its resolution too. However, if the resolution provided in the error message works, then there is no need to worry. But if in case, the resolution fails, then the best way to overcome database corruption is by restoring the data from an updated backup. Unavailability of a valid backup leaves you with no option, but to use advanced third-party SQL Database Recovery application to repair the database.

Consider a practical scenario, where your database unexpectedly stops and restarts again. On the restart, the database does not mount, and you view the below error messages in the error log file:

“DateTimeSPID Error: 602, Severity: 21, State: 30.
DateTimeSPID Could not find an entry for table or index with partition ID 491897996509184 in database 2. This error can occur if a stored procedure references a dropped table, or metadata is corrupted. Drop and re-create the stored procedure, or execute DBCC CHECKDB.
DateTimeSPID Error: 9001, Severity: 21, State: 5.
DateTimeSPID The log for database ‘msdb’ is not available. Check the event log for related error messages. Resolve any errors and restart the database.
DateTimeSPID Error: 3449, Severity: 21, State: 1.
DateTimeSPID SQL Server must shut down in order to recover a database (database ID 1). The database is either a user database that could not be shut down or a system database. Restart SQL Server. If the database fails to recover after another startup, repair or restore the database.”

Cause:

Unexpected shutdown could be caused when SQL Server is unable to handle duplicate partition Ids, which are produced in tempdb database.

Resolution:

To resolve database corruption, you will need to opt for advanced SQL Database Repair tool. These tools use advanced scanning methods to repair your database. Such SQL Recovery tools do not require any technical skills to perform database repair.

Stellar Phoenix SQL Recovery is one of the finest SQL Repair application that allows you to repair corrupt databases after almost all database corruption scenarios. The tool is designed for Windows 7, Vista, XP, 2003, 2000 and NT, and supports SQL Server 2008, 2005, and 2000.

An IAM (Index Allocation Map) page in MS SQL Server database is a metadata entry that maps the extents in a 4GB part of database file. This database file is used by three types of allocation units-IN_ROW_DATA, LOB_DATA, and ROW_OVERFLOW_DATA. An IAM page includes a header to indicate the beginning range of Extents mapped by that particular IAM page. Furthermore, every IAM page contains a sequence number, which acts as its exact position within the IAM chain. Corruption or damage in the sequence numbers primarily results in inaccessibility of records stored in the database. In such situations, if you want to access your data, then you will need to restore the data from an updated backup. However, if no backup is available or backup itself is corrupted, then you will need to use powerful SQL Recovery software.

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

“Chain sequence numbers are out of order in IAM chain for object ID O_ID, index ID I_ID. Page P_ID1 sequence number SEQUENCE1 points to page P_ID2 sequence number SEQUENCE2.”

Your SQL database records become inaccessible after the above error message pops up. To add to your problems, the same error message reappears each time you attempt to access your SQL database records.

Cause:

The fundamental reason for the occurrence of the above error message is metadata corruption i.e the sequence numbers of the IAM pages is corrupted. Corruption can occur due to various hardware and software factors.

Resolution:

For complete troubleshooting of the above error message, you will need to firstly analyze the exact reason for the corruption of sequence numbers of IAM pages. If the corruption is caused due to hardware failure, then change the hardware component. However, in case of software corruption, run DBCC CHECKDB command  with appropriate repair clause  to repair the database.

DBCC CHECKDB command allows complete repair in most cases. But, if in case the command fails, then the only option is to use a advanced SQL Recovery software. Such SQL Database Recovery applications employ high end scanning mechanisms to repair the database.

Stellar Phoenix SQL Recovery is a powerful SQL Database Recovery tool to repair and restore databases created in SQL Server 2008, 2005, and 2000. Designed for Windows Vista, XP, 2003, 2000 and NT operating systems, the software recovers components, such as, views, triggers, stored procedures, and more.

Physical disk problems can be a result of various factors, such as, bad sectors on your hard drive, disk drive failure, or controller damage. A read/write error message pops up whenever your storage media gets physically damaged. This error message is primarily raised when you want to open a database file and MS SQL Server is unable to read the specified disk location. Furthermore, read/write error message disk problems leave your database in unmountable state making the records saved in it inaccessible. To overcome the hazards created by the error message, the best way is to restore the data from an updated backup. However, if the backup fails to restore the data due to its corruption or damage, then you will need to use advanced SQL Database Recovery services to recover your data.

As a practical instance, you experience the below read/write error message while attempting to access your database:

“%s: operating system error %d (%s) encountered”

Records stored in your database file become inaccessible after the above error message appears. Furthermore, the above error message repeatedly occurs each time you attempt to access the database records.

Cause:

The root cause for the occurrence of the above is the physical disk problem caused due to bad sectors, human errors, hard disk controller damage, and many more similar reasons.

Resolution:

To comprehensively troubleshoot the above error message and access the database file, you will need to identify the damaged device by selecting the row from ’sysaltfiles’, which contains same disk name mentioned in the error message:

USE master

GO

SELECT name, filename

FROM master..sysaltfiles

GO

The output of the above query displays the name of physical name of your hard disk.

Self-examine your hard disk and correct the problems. While the problem may solve at your end, the probability of database getting further corrupted always high. To ensure any further damage, it is advisable to opt for advanced SQL Database Recovery services. These SQL Recovery services are provided by data recovery organizations and are performed by highly talented data recovery experts.

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.

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.