Microsoft KB Archive/312090

= Cannot use 32-bit resources on a 64-bit server cluster =

Article ID: 312090

Article Last Modified on 2/28/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, 64-Bit Datacenter Edition
 * Microsoft Windows Advanced Server, Limited Edition

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This article was previously published under Q312090



SYMPTOMS
When you try to install or bring online a 32-bit resource on a 64-bit server cluster, you may experience unexpected results. Specifically, the resource may not come online, or it may constantly attempt to failover to another node.



CAUSE
This behavior occurs because 64-bit processes cannot directly load 32-bit DLLs. Therefore the Resource Monitor (64-bit process) cannot directly load a 32-bit Cluster Resource DLL. Typically Cluster Resource DLLs are directly loaded in the process space of the Resource Monitor, and this means that only 64-bit DLLs can be loaded under the 64-bit Resource Monitor process.



RESOLUTION
Contact the vendor that created the program or cluster resource to obtain an updated 64-bit version. Microsoft Exchange 5.5, Microsoft Exchange 2000, Microsoft SQL 7.0 and Microsoft SQL 2000 use 32-bit cluster resources and are not supported on 64-bit server clusters.



MORE INFORMATION
To help determine if a cluster resource is 32-bit or 64-bit, use the VFI utility that is included in the Windows Server 2003 Resource Kit.

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

875423 Support for 32-bit programs on 64-bit server clusters is included in Windows Server 2003 Service Pack 1 and in x64-based versions of Windows Server 2003

Additional query words: mscs itanium

Keywords: kbenv kbprb KB312090

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