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Consider the following scenario:

•	You have a Windows Server 2008 cluster node.
•	The IsAlive function is executed on the cluster node while a file is being accessed in the root folder of the cluster disk.

In this scenario, a physical disk resource on the Windows Server 2008 cluster node may unexpectedly be offline. This behavior occurs randomly.

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When the IsAlive function is run while a file in the root folder of a Windows Server 2008 cluster node is being accessed, the logic of the IsAlive function is incorrect. For example, Microsoft SQL Server and Microsoft Exchange Server may store temporary files in the root folder, and these files are frequently created and deleted. If these temporary files are accessed while the IsAlive function is being called, the disk resource and any dependent resources may encounter a failed state. This triggers the cluster service restart logic.

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Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a Hotfix download available section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:

Note The Hotfix download available form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must have Windows Server 2008 and the Cluster service installed.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Server 2008, x86-based versions

File name	File version	File size	Date	Time	Platform
Package_1_for_kb953652~31bf3856ad364e35~x86~~6.0.2.0.mum	Not Applicable	1,790	01-Jul-2008	18:03	Not Applicable
Package_2_for_kb953652~31bf3856ad364e35~x86~~6.0.2.0.mum	Not Applicable	1,784	01-Jul-2008	18:03	Not Applicable
Package_for_kb953652_sc_0~31bf3856ad364e35~x86~~6.0.2.0.mum	Not Applicable	1,409	01-Jul-2008	18:03	Not Applicable
Package_for_kb953652_sc~31bf3856ad364e35~x86~~6.0.2.0.mum	Not Applicable	1,422	01-Jul-2008	18:03	Not Applicable
Package_for_kb953652_server_0~31bf3856ad364e35~x86~~6.0.2.0.mum	Not Applicable	1,419	01-Jul-2008	18:03	Not Applicable
Package_for_kb953652_server~31bf3856ad364e35~x86~~6.0.2.0.mum	Not Applicable	1,430	01-Jul-2008	18:03	Not Applicable
X86_53fe3261a03e43dd8aa95996703ff1fe_31bf3856ad364e35_6.0.6001.22213_none_de30b779b658c033.manifest	Not Applicable	711	01-Jul-2008	18:03	Not Applicable
X86_microsoft-windows-f..overcluster-clusres_31bf3856ad364e35_6.0.6001.22213_none_c15c6eceb61e4def.manifest	Not Applicable	10,641	01-Jul-2008	05:52	Not Applicable
Clusres.dll	6.0.6001.22213	911,872	01-Jul-2008	03:55	x86

Windows Server 2008, x64-based versions

File name	File version	File size	Date	Time	Platform
Amd64_a6d13756db734344d66752cc50e907c4_31bf3856ad364e35_6.0.6001.22213_none_82e6b050109bf6cb.manifest	Not Applicable	715	01-Jul-2008	18:03	Not Applicable
Amd64_microsoft-windows-f..overcluster-clusres_31bf3856ad364e35_6.0.6001.22213_none_1d7b0a526e7bbf25.manifest	Not Applicable	10,693	01-Jul-2008	08:45	Not Applicable
Package_1_for_kb953652~31bf3856ad364e35~amd64~~6.0.2.0.mum	Not Applicable	1,800	01-Jul-2008	18:03	Not Applicable
Package_2_for_kb953652~31bf3856ad364e35~amd64~~6.0.2.0.mum	Not Applicable	1,794	01-Jul-2008	18:03	Not Applicable
Package_for_kb953652_sc_0~31bf3856ad364e35~amd64~~6.0.2.0.mum	Not Applicable	1,417	01-Jul-2008	18:03	Not Applicable
Package_for_kb953652_sc~31bf3856ad364e35~amd64~~6.0.2.0.mum	Not Applicable	1,430	01-Jul-2008	18:03	Not Applicable
Package_for_kb953652_server_0~31bf3856ad364e35~amd64~~6.0.2.0.mum	Not Applicable	1,427	01-Jul-2008	18:03	Not Applicable
Package_for_kb953652_server~31bf3856ad364e35~amd64~~6.0.2.0.mum	Not Applicable	1,438	01-Jul-2008	18:03	Not Applicable
Clusres.dll	6.0.6001.22213	1,153,024	01-Jul-2008	06:48	x64

Windows Server 2008, IA-64 version

File name	File version	File size	Date	Time	Platform
Ia64_637da9d80a5af8524f93a54d4690e286_31bf3856ad364e35_6.0.6001.22213_none_469597f2c795f19c.manifest	Not Applicable	713	01-Jul-2008	18:03	Not Applicable
Ia64_microsoft-windows-f..overcluster-clusres_31bf3856ad364e35_6.0.6001.22213_none_c15e12c4b61c56eb.manifest	Not Applicable	10,667	01-Jul-2008	05:17	Not Applicable
Package_1_for_kb953652~31bf3856ad364e35~ia64~~6.0.2.0.mum	Not Applicable	1,795	01-Jul-2008	18:03	Not Applicable
Package_for_kb953652_server_0~31bf3856ad364e35~ia64~~6.0.2.0.mum	Not Applicable	1,423	01-Jul-2008	18:03	Not Applicable
Package_for_kb953652_server~31bf3856ad364e35~ia64~~6.0.2.0.mum	Not Applicable	1,434	01-Jul-2008	18:03	Not Applicable
Clusres.dll	6.0.6001.22213	1,913,856	01-Jul-2008	04:12	IA-64

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

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