A Windows Server 2008-based computer that has a single-processor stops responding if an MPIO-connected device is repeatedly connected and then disconnected

A Windows Server 2008-based computer that has a single-processor stops responding if an MPIO-connected device is repeatedly connected and then disconnected

Article ID : 952779
Last Review : June 2, 2008
Revision : 1.0
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SYMPTOMS

Consider the following scenario:

• You are running a Windows Server 2008-based computer.
• The computer has a single processor installed.
• A device is connected to the computer through the Microsoft Multipath I/O (MPIO) path.
• A read or write operation is performed on the logical unit number (LUN) of the device.
• You repeatedly connect and then disconnect the MPIO path. For example, you repeatedly connect and then disconnect the cable to the device that is reliant on the MPIO path.

In this scenario, the computer stops responding.

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CAUSE

This issue occurs because of a deadlock in the MultiService distributed service model.

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RESOLUTION

Hotfix information

A supported hotfix is now 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 Windows Server 2008 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451 (http://go.microsoft.com/?linkid=6294451)

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)

Prerequisites

To apply this hotfix, you must have Windows Server 2008 installed.

Restart requirement

You must 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 version
File name File version File size Date Time Platform
Package_1_for_kb952779~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,969 13-May-2008 22:48 Not Applicable
Package_2_for_kb952779~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,807 13-May-2008 22:48 Not Applicable
Package_3_for_kb952779~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,807 13-May-2008 22:48 Not Applicable
Package_for_kb952779_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,367 13-May-2008 22:48 Not Applicable
Package_for_kb952779_client~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,430 13-May-2008 22:48 Not Applicable
Package_for_kb952779_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,421 13-May-2008 22:48 Not Applicable
Package_for_kb952779_sc~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,422 13-May-2008 22:48 Not Applicable
Package_for_kb952779_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,425 13-May-2008 22:48 Not Applicable
Package_for_kb952779_server~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,430 13-May-2008 22:48 Not Applicable
Update.mum Not Applicable 2,580 13-May-2008 22:48 Not Applicable
X86_mpio.inf_31bf3856ad364e35_6.0.6001.22177_none_1d77cbf8a8a45430.manifest Not Applicable 1,659 13-May-2008 22:53 Not Applicable
Mpio.sys 6.0.6001.22177 105,528 13-May-2008 03:31 x86
Windows Server 2008, x64 version
File name File version File size Date Time Platform
Amd64_mpio.inf_31bf3856ad364e35_6.0.6001.22177_none_7996677c6101c566.manifest Not Applicable 1,661 13-May-2008 22:56 Not Applicable
Package_1_for_kb952779~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,981 13-May-2008 22:48 Not Applicable
Package_2_for_kb952779~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,817 13-May-2008 22:48 Not Applicable
Package_3_for_kb952779~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,817 13-May-2008 22:48 Not Applicable
Package_for_kb952779_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,375 13-May-2008 22:48 Not Applicable
Package_for_kb952779_client~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,438 13-May-2008 22:48 Not Applicable
Package_for_kb952779_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,429 13-May-2008 22:48 Not Applicable
Package_for_kb952779_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,430 13-May-2008 22:48 Not Applicable
Package_for_kb952779_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,433 13-May-2008 22:48 Not Applicable
Package_for_kb952779_server~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,438 13-May-2008 22:48 Not Applicable
Update.mum Not Applicable 2,598 13-May-2008 22:48 Not Applicable
Mpio.sys 6.0.6001.22177 129,080 13-May-2008 04:01 x64
Windows Server 2008, IA-64 version
File name File version File size Date Time Platform
Ia64_mpio.inf_31bf3856ad364e35_6.0.6001.22177_none_1d796feea8a25d2c.manifest Not Applicable 1,660 13-May-2008 22:48 Not Applicable
Package_1_for_kb952779~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,812 13-May-2008 22:48 Not Applicable
Package_2_for_kb952779~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,812 13-May-2008 22:48 Not Applicable
Package_for_kb952779_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,425 13-May-2008 22:48 Not Applicable
Package_for_kb952779_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,426 13-May-2008 22:48 Not Applicable
Package_for_kb952779_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,429 13-May-2008 22:48 Not Applicable
Package_for_kb952779_server~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,434 13-May-2008 22:48 Not Applicable
Update.mum Not Applicable 1,922 13-May-2008 22:48 Not Applicable
Mpio.sys 6.0.6001.22177 282,168 13-May-2008 04:02 IA-64

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STATUS

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

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APPLIES TO
• Windows Server 2008 Datacenter without Hyper-V
• Windows Server 2008 Enterprise without Hyper-V
• Windows Server 2008 for Itanium-Based Systems
• Windows Server 2008 Standard without Hyper-V
• Windows Server 2008 Datacenter
• Windows Server 2008 Enterprise
• Windows Server 2008 Standard

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Keywords: 
kbhotfixserver kbqfe kbexpertiseinter KB952779

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