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Symptoms

Consider the following scenario:

  • Windows 8 is installed on a computer that uses an eMMC embedded storage device.

  • The eMMC embedded storage device performs a NAND management activity that lasts longer that one second.

  • The Windows 8 SDBUS.sys driver detects an I/O request time-out and then starts a recovery.

  • The Windows 8 SDBUS.sys driver sends an abort command (CMD12) to the eMMC device.

  • The embedded storage controller also sends an abort command to the eMMC device.

In this scenario, Windows 8 may become unresponsive, and you may have to restart the computer to clear the condition.

Cause

This problem occurs because the eMMC embedded storage device does not handle two concurrent abort commands when the device is busy because of internal NAND management. The storage device does not send a response to the abort command that is issued by the controller. This triggers the SDBUS.sys error recovery flow again, and the device never recovers.

Status

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

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.

Prerequisites

To apply this hotfix, you must be running Windows 8.

Registry information

To use the hotfix in this package, you do not 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 does not replace a previously released hotfix.

FILE INFORMATION

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

Windows 8 and Windows Server 2012 file information

  • 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

    6.2.920 0.16 xxx

    Windows 8 and Windows Server 2012

    RTM

    GDR

    6.2.920 0.20 xxx

    Windows 8 and Windows Server 2012

    RTM

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

Note The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

File name

File version

File size

Date

Time

Platform

Dumpsd.sys

6.2.9200.16475

104,168

08-Dec-2012

05:15

x86

Sdbus.sys

6.2.9200.16475

158,952

08-Dec-2012

05:16

x86

Dumpsd.sys

6.2.9200.20579

104,168

08-Dec-2012

05:06

x86

Sdbus.sys

6.2.9200.20579

158,952

08-Dec-2012

05:06

x86


File name

File version

File size

Date

Time

Platform

Dumpsd.sys

6.2.9200.16475

124,648

08-Dec-2012

09:02

x64

Sdbus.sys

6.2.9200.16475

194,280

08-Dec-2012

09:02

x64

Dumpsd.sys

6.2.9200.20579

124,648

08-Dec-2012

09:03

x64

Sdbus.sys

6.2.9200.20579

194,280

08-Dec-2012

09:03

x64


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:

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

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