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How do I manually remove a failed SQL Server 2008 installation?

Posted on 2010-11-09
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After installing the first node of a SQL Server 2008 R2 failover cluster, our storage "support" team decided it would be a good idea to erase the disks upon which the SQL Server system disks resided. They were successful and rendered the installed node useless. The gui tools could not uninstall because Master was missing.  Does anyone know how to manually remove SQL Server so that it can be reinstalled
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Question by:Integr8
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by:adammet04
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How about rebuilding the node completely? rather than just manually uninstall sql, could you rebuild the box itself?. might be a cleaner solution.
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by:EvilPostIt
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Are you just missing the databases?

If so you could rebuild the master database and then maybe uninstall.

Here is an article which should guide you through rebuilding the system databases.
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What ultimately worked was to keep uninstalling SQL Server until all of it was gone.  The windows node had 2 sql server failover nodes plus a default standalone instance and a named standalone instance running on it. By failing over the cluster instances to another node and running the install gui  until all of the standalones were gone, it was possible to remove all of SQL Server from the Windows node. It was necessary to reboot after each complete uninstall so that no error was generated on the next uninstall. All pieces of SQL Server on this server were SQL Server 2008 R2 Enterprise Edition.
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by:Integr8
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I'm disappointed that I had to provide my own solution.
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