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Microsoft distributes Microsoft SQL Server 2008 fixes as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 fix release.

Symptoms

An unattended installation of Microsoft SQL Server 2008 is started on a computer that has SQL Server 2008 R2 installed. When the unattended installation uses the same instance name that SQL Server 2008 R2 uses, you experience one of the following problems.

Problem 1

If the specified location for the SQL Server 2008 data folders is the same as the location of SQL Server 2008 R2, the SQL Server 2008 setup fails. Additionally, you receive the following error message:

The system database file database_name already exists in path.

Notes

  • <database_name> represents the name of the system database file. <path> represents the path of the system database file.

  • Even though you receive an error message, the instance of SQL Server 2008 is not corrupted an is fully usable.

Problem 2

If the specified location for the SQL Server 2008 data folders differs from the location of SQL Server 2008 R2, SQL Server 2008 is installed successfully. However, the installation corrupts the SQL Server 2008 R2 service, and the SQL Server Database Engine service cannot start. Additionally, you cannot uninstall or repair either product.

Cause

This problem occurs because the unattended installation of SQL Server 2008 does not check whether a later version of the same instance name is installed already. Therefore, the unattended installation continues when it should be blocked.

Resolution

The fix for this issue was first released in Cumulative Update 7 for SQL Server 2008 Service Pack 1. For more information about this cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base: -

979065Cumulative update package 7 for SQL Server 2008 Service Pack 1
NoteBecause the builds are cumulative, each new fix release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 fix release. We recommend that you consider applying the most recent fix release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base: -

970365The SQL Server 2008 builds that were released after SQL Server 2008 Service Pack 1 was released
Microsoft SQL Server 2008 hotfixes are created for specific SQL Server service packs. You must apply a SQL Server 2008 Service Pack 1 hotfix to an installation of SQL Server 2008 Service Pack 1. By default, any hotfix that is provided in a SQL Server service pack is included in the next SQL Server service pack.

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References

For information about the Incremental Servicing Model for SQL Server, click the following article number to view the article in the Microsoft Knowledge Base:

935897 An Incremental Servicing Model is available from the SQL Server team to deliver hotfixes for reported problems



For more information about the naming schema for SQL Server updates, click the following article number to view the article in the Microsoft Knowledge Base:

822499New naming schema for Microsoft SQL Server software update packages

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

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