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Symptoms

Consider the following scenario:

  • You connect a Windows Server 2008 failover cluster node to an external storage device.

  • You use Microsoft Multipath I/O (MPIO) to manage the storage device.

  • The storage device is part of the cluster resources.

  • All MPIO paths to the storage device fail, and then the paths recover after awhile. For example, you turn off the storage device, and then you turn it back on after awhile.

In this scenario, the cluster resources fail over unexpectedly before the time in the PDORemovePeriod parameter expires. However, you expect that the multipath pseudo-logical unit numbers (LUNs) will remain active before the time in the PDORemovePeriod parameter expires, even after all paths to the storage device fail.

Resolution

Hotfix information

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

Note Because MPIO is not supported in Windows Vista, this hotfix is only for Windows Server 2008. Although the hotfix packages on the "Hotfix Request" page are marked Windows Vista, they are for Windows Server 2008.

Note If the Microsoft Device Specific Module (MSDSM.sys) is being used with the MPIO solution, you should also apply hotfix 972797.

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 the problem described in this article. 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:

http://support.microsoft.com/contactus/?ws=supportNote 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

No prerequisites are required.

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 global 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 Vista and Windows Server 2008 file information notes

  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    SR_Level

    Service branch

    6.0.6000.16xxx

    Windows Vista

    RTM

    GDR

    6.0.6000.20xxx

    Windows Vista

    RTM

    LDR

    6.0.6001.18xxx

    Windows Vista and Windows Server 2008

    SP1

    GDR

    6.0.6001.22xxx

    Windows Vista and Windows Server 2008

    SP1

    LDR

    6.0.6002.18xxx

    Windows Vista and Windows Server 2008

    SP2

    GDR

    6.0.6002.22xxx

    Windows Vista and Windows Server 2008

    SP2

    LDR

  • Service Pack 1 is integrated into the original release of Windows Server 2008.

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are
    listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Mpio.inf

Not Applicable

3,760

11-Jun-2009

07:45

Not Applicable

Mpio.sys

6.0.6001.22448

106,056

11-Jun-2009

12:54

x86

Mpio.inf

Not Applicable

3,760

11-Jun-2009

07:42

Not Applicable

Mpio.sys

6.0.6002.22151

106,552

11-Jun-2009

12:32

x86

For all supported x64-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Mpio.inf

Not Applicable

3,768

11-Jun-2009

07:45

Not Applicable

Mpio.sys

6.0.6001.22448

130,120

11-Jun-2009

13:25

x64

Mpio.inf

Not Applicable

3,768

11-Jun-2009

07:44

Not Applicable

Mpio.sys

6.0.6002.22151

130,616

11-Jun-2009

12:37

x64

For all supported Itanium-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Mpio.inf

Not Applicable

3,764

11-Jun-2009

07:43

Not Applicable

Mpio.sys

6.0.6001.22448

289,352

11-Jun-2009

12:53

IA-64

Mpio.inf

Not Applicable

3,764

11-Jun-2009

07:49

Not Applicable

Mpio.sys

6.0.6002.22151

290,360

11-Jun-2009

12:34

IA-64

Status

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

More Information

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

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information for Windows Server 2008

Additional files for all supported x86-based versions of Windows Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Package_for_kb970525_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,367

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_client_2~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,693

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_client~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,713

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,421

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_sc_1~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,690

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_sc~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,701

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,425

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_server_1~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,694

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_server~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,713

12-Jun-2009

05:09

Not Applicable

X86_mpio.inf_31bf3856ad364e35_6.0.6001.22448_none_1d9941b8a88b1129.manifest

Not Applicable

1,659

12-Jun-2009

05:17

Not Applicable

X86_mpio.inf_31bf3856ad364e35_6.0.6002.22151_none_1f6de1aea5bfd0dd.manifest

Not Applicable

1,659

12-Jun-2009

05:17

Not Applicable

Additional files for all supported x64-based versions of Windows Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Amd64_mpio.inf_31bf3856ad364e35_6.0.6001.22448_none_79b7dd3c60e8825f.manifest

Not Applicable

1,661

12-Jun-2009

05:22

Not Applicable

Amd64_mpio.inf_31bf3856ad364e35_6.0.6002.22151_none_7b8c7d325e1d4213.manifest

Not Applicable

1,661

12-Jun-2009

05:22

Not Applicable

Package_for_kb970525_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,375

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_client_2~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,705

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_client~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,723

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,429

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_sc_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,702

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,711

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,433

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_server_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,706

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_server~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,723

12-Jun-2009

05:09

Not Applicable

Additional files for all supported Itanium-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Ia64_mpio.inf_31bf3856ad364e35_6.0.6001.22448_none_1d9ae5aea8891a25.manifest

Not Applicable

1,660

12-Jun-2009

05:09

Not Applicable

Ia64_mpio.inf_31bf3856ad364e35_6.0.6002.22151_none_1f6f85a4a5bdd9d9.manifest

Not Applicable

1,660

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,425

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_sc_1~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,529

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,706

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,429

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_server_1~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,533

12-Jun-2009

05:09

Not Applicable

Package_for_kb970525_server~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,717

12-Jun-2009

05:09

Not Applicable

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