This article describes a Storport issue in Windows Server 2012 R2. A hotfix is available to fix this issue. The hotfix has a prerequisite.

Symptoms

When a disk fails or isn't responsive and a large number of I/O port transitions are pending, I/Os may be stalled because the storage adapter is paused and will be resumed after a time-out period as specified by the miniport.

Resolution

To fix this issue, we have released a hotfix. Even though this issue has only been reported in Windows Server 2012 R2, this hotfix also applies to Windows 8.1 and Windows RT 8.1. 

Important If you install a language pack after you install this hotfix, you must reinstall this hotfix. Therefore, we recommend that you install any language packs that you need before you install this hotfix. For more information, see Add language packs to Windows.

Hotfix Information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that's described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there's a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section doesn't appear, submit a request to Microsoft Customer Service and Support to get 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 don't 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 don't see your language, it's because a hotfix isn't available for that language.

Prerequisites

To apply this hotfix, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows 8.1 or Windows Server 2012 R2.

Registry information

To use the hotfix in this package, you don't have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix doesn't 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 8.1 and Windows Server 2012 R2 file information and notes

Important Windows 8.1 hotfixes and Windows Server 2012 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 8.1/Windows Server 2012 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, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.3.960 0.17xxx

    Windows 8.1 and Windows Server 2012 R2

    RTM

    GDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes aren't listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Storport.sys

6.3.9600.17937

312,152

16-Jul-2015

21:06

x86

For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Storport.sys

6.3.9600.17937

374,104

16-Jul-2015

22:01

x64

For all supported Windows RT 8.1

File name

File version

File size

Date

Time

Platform

Storport.sys

6.3.9600.17937

290,664

16-Jul-2015

20:07

Not applicable

Additional file information

Additional file information for Windows 8.1 and for Windows Server 2012 R2

Additional files for all supported x86-based versions of Windows 8.1

File property

Value

File name

X86_829ad29f945b74296884806539fc13cd_31bf3856ad364e35_6.3.9600.17937_none_34ab56c4c9b479f2.manifest

File version

Not applicable

File size

696

Date (UTC)

17-Jul-2015

Time (UTC)

11:48

Platform

Not applicable

File name

X86_microsoft-windows-storport_31bf3856ad364e35_6.3.9600.17937_none_bc5518464b9d43ec.manifest

File version

Not applicable

File size

78,096

Date (UTC)

16-Jul-2015

Time (UTC)

21:20

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File property

Value

File name

Amd64_22a438093c281b6b2da0d956152c3de4_31bf3856ad364e35_6.3.9600.17937_none_b20733b9305ae484.manifest

File version

Not applicable

File size

700

Date (UTC)

17-Jul-2015

Time (UTC)

11:48

Platform

Not applicable

File name

Amd64_microsoft-windows-storport_31bf3856ad364e35_6.3.9600.17937_none_1873b3ca03fab522.manifest

File version

Not applicable

File size

78,098

Date (UTC)

16-Jul-2015

Time (UTC)

23:09

Platform

Not applicable

Additional files for all supported Windows RT 8.1

File property

Value

File name

Arm_d794314166c1d4927161c61c88a0645b_31bf3856ad364e35_6.3.9600.17937_none_26c9c88cc352b496.manifest

File version

Not applicable

File size

696

Date (UTC)

17-Jul-2015

Time (UTC)

11:48

Platform

Not applicable

File name

Arm_microsoft-windows-storport_31bf3856ad364e35_6.3.9600.17937_none_bc578a9e4b9a62b2.manifest

File version

Not applicable

File size

78,096

Date (UTC)

16-Jul-2015

Time (UTC)

20:21

Platform

Not applicable

Status

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

References

See the terminology that Microsoft uses to describe software updates.

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