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Sunday, February 7, 2010

Rectifying Error 2501 and recovering data from corrupt SQL Server 2008 database

MS SQL Server is a relational model database server from Microsoft that enables enterprise solutions in various organizations. It assists you in creating and managing databases by adding, modifying, and dropping databases and various other tables. In addition, it supports full-text search to enable you to fully search the database in any which manner. However, sometimes the database get corrupt, which sometimes makes the database in exhibiting strange behavior or make it inaccesible as well. Such reasons could be virus infections, power outages, abrupt system shutdown, hardware problems, etc. In such cases, you should use appropriate corrective measures to resolve ths situation. If you are not able to recover the corrupted database, then you should use a third-party sql recovery software software to perform SQL Recovery.

Consider a scenario wherein you are unable to open an MS SQL Server 2008 database table. An error message is displayed in this case, which is:

Cannot find a table or object with the name 'NAME'. Check the system catalog.”

Cause:

There could be the following causes for this situation:

  • The database table is not present, or was deleted before performing this operation.

  • The database table is not specified correctly.

  • The database table is corrupt and, therefore, inaccessible to you.

Resolution:

To resolve this situation, you should perform the following methods:

  • You should verify if the database database is present or not.

  • You should verify if the table name has been spelled correctly or not.

  • You should verify if the database schema contains the table or not.

  • You should verify if the table exists in the system tables. If the table is not present, then it may have been deleted or you do not have the permissions to use the table. Check the settings and retry to mount it.

However, if you still are not able to mount the database table that means it is corrupt. For such cases, you should use a third-party sql recovery software to repair the corrupted SQL database. Such highly interactive tools are read-only in nature that do not overwrite the existing database while scanning it.

Monday, January 11, 2010

SQL Server Database FILESTREAME Corruption – Solutions for corrupted SQL server database

Before SQL Server 2008 release, the process of managing and storing unstructured data was very poor and complex.

Earlier Approaches of Storing Unstructured Data

Before the release of SQL server 2008, there were two approaches of storing unstructured SQL data. The first approach was of storing data in a VARBINARY or IMAGE columns. This type of approach had transactional consistency and also reduced data organizing complexities, but it was performance based. The other types of approach was to store unstructured data as disk files and to save the file location in the table along with some structured data linked to it. The second approach was good in terms of performance, but did not ensure transactional consistency problems.

FILESTREAM Features ' Efficient & Effective Storage of Unstructured Data

The FILESTREAM feature was introduced with SQL Server 2008 database for managing and storing unstructured data efficiently. This new feature allows storing of BLOB data (like video, images files, word documents, music file etc) in the NTFS (new technology file system) file system. It ensures transactional consistency between the unstructured data stored in new technology file system (NTFS) and the structured data stored in tables.

FILESTREAM Corruption Error 7904

Sometimes, when you try to restore MS SQL Server 2008 database (MDF & NDF files) from transaction log backups, database gets corrupted. You fail to perform restoration of SQL server database and thus MDF or NDF files become inaccessible resulting in database loss. Under such types of problem, you might encounter the error: ' FILESTREAM corruption - missing files, error 7904.' At that time, if you want to regain access of your mission critical MDF files, you must have to perform SQL database recovery process using appropriate SQL server database recovery software.