Introduction
This article describes a hotfix that provides a mechanism for Microsoft Device Specific Module (DSM) to notify Microsoft Multipath I/O (MPIO) that a particular path is back online. This hotfix adds a new notification type to the existing DsmNotification interface.
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 website:
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.Notes for third-party DSM developersIf you want to implement your own DSM provider together with MS MPIO, and you want to configure PathOnLine notification type that is introduced in this update, follow the following syntax:For the new PathOnline notification type, the DsmNotification interface takes these additional parameters: PathId (PVOID), DsmId (PVOID), Status (PNTSTATUS).
Prerequisites
To apply this hotfix, you must be running Windows Server 2008 Service Pack 2 (SP2) or Windows Server 2008 R2 SP1.For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
968849How to obtain the latest service pack for Windows Server 2008For more information about how to obtain a Windows 7 or a Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2
Registry information
To apply this hotfix, you do not have to make any changes to the registry.
Restart requirement
You must restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace a previously released hotfix.
The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows Server 2008 file information notesImportant Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
-
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
6.0.600 2. 22xxx
Windows Server 2008
SP2
LDR
-
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Vista and for Windows Server 2008" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. The security catalog files, for which the attributes are 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.sys |
6.0.6002.22946 |
107,392 |
09-Oct-2012 |
17:27 |
x86 |
|
Msdsm.sys |
6.0.6002.22946 |
92,032 |
09-Oct-2012 |
17:31 |
x86 |
For all supported x64-based versions of Windows Server 2008
|
File name |
File version |
File size |
Date |
Time |
Platform |
|---|---|---|---|---|---|
|
Mpio.sys |
6.0.6002.22946 |
131,968 |
09-Oct-2012 |
17:20 |
x64 |
|
Msdsm.sys |
6.0.6002.22946 |
111,488 |
09-Oct-2012 |
17:24 |
x64 |
For all supported IA-64-based versions of Windows Server 2008
|
File name |
File version |
File size |
Date |
Time |
Platform |
|---|---|---|---|---|---|
|
Mpio.sys |
6.0.6002.22946 |
294,288 |
09-Oct-2012 |
17:12 |
IA-64 |
|
Msdsm.sys |
6.0.6002.22946 |
276,864 |
09-Oct-2012 |
17:16 |
IA-64 |
Windows Server 2008 R2 file information notesImportant Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
-
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
6.1.760 1. 18xxx
Windows Server 2008 R2
SP1
GDR
6.1.760 1. 22xxx
Windows Server 2008 R2
SP1
LDR
-
GDR service branches contain only those fixes that are widely released to address widespread, extremely important issues. LDR service branches contain hotfixes in addition to widely released fixes.
-
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x64-based versions of Windows Server 2008 R2
|
File name |
File version |
File size |
Date |
Time |
Platform |
|---|---|---|---|---|---|
|
Mpio.sys |
6.1.7601.18015 |
159,064 |
30-Nov-2012 |
06:02 |
x64 |
|
Mpio.sys |
6.1.7601.22177 |
160,600 |
30-Nov-2012 |
05:58 |
x64 |
|
Msdsm.sys |
6.1.7601.18015 |
141,144 |
30-Nov-2012 |
06:02 |
x64 |
|
Msdsm.sys |
6.1.7601.22177 |
142,168 |
30-Nov-2012 |
05:58 |
x64 |
For all supported IA-64-based versions of Windows Server 2008 R2
|
File name |
File version |
File size |
Date |
Time |
Platform |
|---|---|---|---|---|---|
|
Mpio.sys |
6.1.7601.18015 |
357,208 |
30-Nov-2012 |
04:44 |
IA-64 |
|
Mpio.sys |
6.1.7601.22177 |
365,912 |
30-Nov-2012 |
04:56 |
IA-64 |
|
Msdsm.sys |
6.1.7601.18015 |
348,520 |
30-Nov-2012 |
04:44 |
IA-64 |
|
Msdsm.sys |
6.1.7601.22177 |
352,088 |
30-Nov-2012 |
04:56 |
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
When a path failure is reported by the DSM, the MPIO marks the path as failed and schedules a path recovery worker thread. If the path is back online, the DSM recognizes it as a valid path and may return the path of the MPIO. However, if the recovery worker thread of the path does not run, the path is still marked as failed. Therefore, a delay occurs when the MPIO handles the I/O requests.After you apply this hotfix, the DSM can notify the MPIO to clear the failure mark on a path that is back online.For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684Description 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
|
File name |
X86_mpio.inf_31bf3856ad364e35_6.0.6002.22946_none_1f7dc23ca5b31cd7.manifest |
|
File version |
Not applicable |
|
File size |
1,659 |
|
Date (UTC) |
09-Oct-2012 |
|
Time (UTC) |
17:36 |
|
Platform |
Not applicable |
|
File name |
X86_msdsm.inf_31bf3856ad364e35_6.0.6002.22946_none_cc922855f1ea6ee6.manifest |
|
File version |
Not applicable |
|
File size |
1,664 |
|
Date (UTC) |
09-Oct-2012 |
|
Time (UTC) |
17:36 |
|
Platform |
Not applicable |
Additional files for all supported x64-based versions of Windows Server 2008
|
File name |
Amd64_mpio.inf_31bf3856ad364e35_6.0.6002.22946_none_7b9c5dc05e108e0d.manifest |
|
File version |
Not applicable |
|
File size |
1,661 |
|
Date (UTC) |
09-Oct-2012 |
|
Time (UTC) |
17:36 |
|
Platform |
Not applicable |
|
File name |
Amd64_msdsm.inf_31bf3856ad364e35_6.0.6002.22946_none_28b0c3d9aa47e01c.manifest |
|
File version |
Not applicable |
|
File size |
1,666 |
|
Date (UTC) |
09-Oct-2012 |
|
Time (UTC) |
17:36 |
|
Platform |
Not applicable |
Additional files for all supported IA-64-based versions of Windows Server 2008
|
File name |
Ia64_mpio.inf_31bf3856ad364e35_6.0.6002.22946_none_1f7f6632a5b125d3.manifest |
|
File version |
Not applicable |
|
File size |
1,660 |
|
Date (UTC) |
09-Oct-2012 |
|
Time (UTC) |
17:36 |
|
Platform |
Not applicable |
|
File name |
Ia64_msdsm.inf_31bf3856ad364e35_6.0.6002.22946_none_cc93cc4bf1e877e2.manifest |
|
File version |
Not applicable |
|
File size |
1,665 |
|
Date (UTC) |
09-Oct-2012 |
|
Time (UTC) |
17:36 |
|
Platform |
Not applicable |
Additional file information for Windows Server 2008 R2
Additional files for all supported x64-based versions of Windows Server 2008 R2
|
File name |
Amd64_mpio.inf_31bf3856ad364e35_6.1.7601.18015_none_7b59c20ea5f30ae4.manifest |
|
File version |
Not Applicable |
|
File size |
2,073 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
06:36 |
|
Platform |
Not Applicable |
|
File name |
Amd64_mpio.inf_31bf3856ad364e35_6.1.7601.22177_none_7ba47fe5bf3f8502.manifest |
|
File version |
Not Applicable |
|
File size |
2,073 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
06:24 |
|
Platform |
Not Applicable |
|
File name |
Amd64_msdsm.inf_31bf3856ad364e35_6.1.7601.18015_none_286e2827f22a5cf3.manifest |
|
File version |
Not Applicable |
|
File size |
2,079 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
06:43 |
|
Platform |
Not Applicable |
|
File name |
Amd64_msdsm.inf_31bf3856ad364e35_6.1.7601.22177_none_28b8e5ff0b76d711.manifest |
|
File version |
Not Applicable |
|
File size |
2,079 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
06:29 |
|
Platform |
Not Applicable |
|
File name |
Update-bf.mum |
|
File version |
Not Applicable |
|
File size |
30,780 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
12:26 |
|
Platform |
Not Applicable |
|
File name |
Update.mum |
|
File version |
Not Applicable |
|
File size |
31,393 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
12:26 |
|
Platform |
Not Applicable |
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
|
File name |
Ia64_mpio.inf_31bf3856ad364e35_6.1.7601.18015_none_1f3cca80ed93a2aa.manifest |
|
File version |
Not Applicable |
|
File size |
2,071 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
06:13 |
|
Platform |
Not Applicable |
|
File name |
Ia64_mpio.inf_31bf3856ad364e35_6.1.7601.22177_none_1f87885806e01cc8.manifest |
|
File version |
Not Applicable |
|
File size |
2,071 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
06:17 |
|
Platform |
Not Applicable |
|
File name |
Ia64_msdsm.inf_31bf3856ad364e35_6.1.7601.18015_none_cc51309a39caf4b9.manifest |
|
File version |
Not Applicable |
|
File size |
2,077 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
06:17 |
|
Platform |
Not Applicable |
|
File name |
Ia64_msdsm.inf_31bf3856ad364e35_6.1.7601.22177_none_cc9bee7153176ed7.manifest |
|
File version |
Not Applicable |
|
File size |
2,077 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
06:21 |
|
Platform |
Not Applicable |
|
File name |
Update-bf.mum |
|
File version |
Not Applicable |
|
File size |
4,318 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
12:26 |
|
Platform |
Not Applicable |
|
File name |
Update.mum |
|
File version |
Not Applicable |
|
File size |
4,399 |
|
Date (UTC) |
30-Nov-2012 |
|
Time (UTC) |
12:26 |
|
Platform |
Not Applicable |
