A Windows Server 2008-based computer may stop responding when you use a Device Specific Module that plugs into MPIO

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Article ID: 958912 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You have a Windows Server 2008-based computer.
  • You expose the computer to a Microsoft Multipath I/O (MPIO)-based pseudo-logical unit number (LUN) that uses the MPIO solution.
  • You use a Microsoft Device Specific Module (DSM) that plugs into MPIO.
In this scenario, the Windows Server 2008-based computer may stop responding (hang). Additionally, other applications and services that are currently running may stop working.

This problem may occur when one of the following APIs is called:
  • ThrottleIO
  • ResumeIO
  • ThrottleIO_V2
  • ResumeIO_V2

CAUSE

This problem occurs because the I/O requests are stopped at the MPIO level. A computer that uses a pseudo-LUN remains in a throttled state and cannot return. This behavior causes all I/O requests that use the pseudo-LUN to stop.

RESOLUTION

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 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=support
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.

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 are marked for Windows Vista on the "Hotfix Request" page, they are for Windows Server 2008.

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 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 file information notes
The MANIFEST files (.manifest) and MUM files (.mum) that are installed for each environment are listed separately. MUM and MANIFEST files and their associated security catalog (.cat) files are critical to maintaining the state of the updated component. The security catalog files are signed with a Microsoft digital signature. (The attributes for these files are not listed.)
All supported x86-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mpio.infNot applicable3,76016-Oct-200823:48Not applicable
Mpio.sys6.0.6001.22289103,68817-Oct-200804:42x86
All supported x64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mpio.infNot applicable3,76817-Oct-200800:25Not applicable
Mpio.sys6.0.6001.22289127,75217-Oct-200805:54x64
All supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mpio.infNot applicable3,76416-Oct-200823:55Not applicable
Mpio.sys6.0.6001.22289281,35217-Oct-200805:30IA-64

STATUS

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

MORE INFORMATION

Additional file information for Windows Server 2008

Additional files for all supported x86-based versions of Windows Server 2008
Collapse this tableExpand this table
File namePackage_1_for_kb958912~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,969
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_2_for_kb958912~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,807
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_3_for_kb958912~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,807
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,367
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_client~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,430
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,421
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_sc~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,422
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,425
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_server~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,430
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File nameX86_mpio.inf_31bf3856ad364e35_6.0.6001.22289_none_1d6efe86a8aa9ff6.manifest
File versionNot applicable
File size1,659
Date (UTC)17-Oct-2008
Time (UTC)17:46
PlatformNot applicable
Additional files for all supported x64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameAmd64_mpio.inf_31bf3856ad364e35_6.0.6001.22289_none_798d9a0a6108112c.manifest
File versionNot applicable
File size1,661
Date (UTC)17-Oct-2008
Time (UTC)17:49
PlatformNot applicable
File namePackage_1_for_kb958912~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,981
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_2_for_kb958912~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,817
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_3_for_kb958912~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,817
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,375
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_client~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,438
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,429
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,430
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,433
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_server~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,438
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameIa64_mpio.inf_31bf3856ad364e35_6.0.6001.22289_none_1d70a27ca8a8a8f2.manifest
File versionNot applicable
File size1,660
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_1_for_kb958912~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size1,812
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_2_for_kb958912~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size1,812
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size1,425
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size1,426
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size1,429
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable
File namePackage_for_kb958912_server~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size1,434
Date (UTC)17-Oct-2008
Time (UTC)17:44
PlatformNot applicable

Properties

Article ID: 958912 - Last Review: October 8, 2011 - Revision: 3.0
APPLIES TO
  • Windows Server 2008 Standard
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
Keywords: 
kbautohotfix kbexpertiseinter kbfix kbbug kbqfe KB958912

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