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You cannot add or remove features to a SQL Server 2008 or SQL Server 2008 R2 failover cluster
Article ID: 2547273 - View products that this article applies to.
SQL Server 2008 or SQL Server 2008 R2 does not support adding or removing features or components to an existing failover cluster instance. For example, you cannot add the Database Engine to an existing Analysis Services-only failover cluster or add Analysis Services to an existing Database Engine-only failover cluster. On the same note removing features from a clustered instance is also not supported.
The option to add or remove features is not supported either when running the setup through SQL Server Installation Center or when running the setup from a command prompt. For more information on the what happens when you try to add a feature through setup you can refer to the following forum post:
If you need to add or remove features to an existing installation you need to reinstall the virtual instance with the required features. For additional information you can refer to the following topics in SQL Server Books Online:
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.
Article ID: 2547273 - Last Review: May 5, 2011 - Revision: 1.0