Access to an MPIO-controlled storage device fails on a Windows Server 2008-based computer after you disconnect and then reconnect all data cables
Symptoms
Consider the following scenario:You connect a Windows Server 2008-based computer to a storage device that is controlled by Microsoft Multipath I/O (MPIO).You use a third-party device specific module (DSM) for MPIO.You disconnect all data cables and then reconnect them.In this scenario, access to the storage device fails. Therefore, applications that try to access the storage device crash or receive an exception. This problem persists until you restart the Windows Server 2008-based computer.
Resolution
Hotfix informationImportant 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.
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(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.PrerequisitesNo prerequisites are required.Restart requirementYou must restart the computer after you apply this hotfix.Hotfix replacement informationThis hotfix does not replace any other hotfixes.File informationThe 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.File information notesThe files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
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VersionProductMilestoneService branch6.0.6000.16xxxWindows VistaRTMGDR6.0.6000.20xxxWindows VistaRTMLDR6.0.6001.18xxxWindows Vista SP1 and Windows Server 2008 SP1SP1GDR6.0.6001.22xxxWindows Vista SP1 and Windows Server 2008 SP1SP1LDRService Pack 1 is integrated into Windows Server 2008.The MANIFEST (.manifest) files and MUM (.mum) files 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 of these files are not listed.)All supported x86-based versions of Windows Server 2008
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File nameFile versionFile sizeDateTimePlatformMpio.infNot applicable3,76004-Feb-200900:45Not applicableMpio.sys6.0.6001.22368104,41604-Feb-200906:06x86All supported x64-based versions of Windows Server 2008
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File nameFile versionFile sizeDateTimePlatformMpio.infNot applicable3,76804-Feb-200900:44Not applicableMpio.sys6.0.6001.22368128,48004-Feb-200906:30x64All supported Itanium-based versions of Windows Server 2008
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File nameFile versionFile sizeDateTimePlatformMpio.infNot applicable3,76403-Feb-200923:42Not applicableMpio.sys6.0.6001.22368282,60804-Feb-200905:07IA-64
