A buffer alignment error may occur when you use ADMA2 host controller implementation in Windows 7 or in Windows Server 2008 R2

Applies to: Windows 7 EnterpriseWindows 7 Home BasicWindows 7 Home Premium

Symptoms


When you use Advanced DMA 2 (ADMA2) host controller implementation for the Secure Digital (SD) card bus driver(Sdbus.sys) on a computer that is running Windows 7 or Windows Server 2008 R2, a buffer alignment error may occur. Additionally, Device Manager displays the following:
  • A yellow exclamation mark on the controller
  • Error code 10

Cause


This issue occurs because the alignment of the data buffer that is provided by the function driver (4-byte aligned) for ADMA2 transfer does not match the specification of the SD card bus driver (8-byte aligned). Therefore, the driver fails, and error code 10 is displayed in Device Manager.

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: 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.

Prerequisites

To apply this hotfix, you must be running one of the following operating systems:
  • Windows 7
  • Windows 7 Service Pack 1 (SP1)
  • Windows Server 2008 R2
  • Windows Server 2008 R2 Service Pack 1 (SP1)

Registry information

To use the hotfix in this package, 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.

File information

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 7 and Windows Server 2008 R2 file information notes
  • 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.
    VersionProductSR_LevelService branch
    6.1.760
    0.
    16xxx
    Windows 7 and Windows Server 2008 R2RTMGDR
    6.1.760
    0.
    20xxx
    Windows 7 and Windows Server 2008 R2RTMLDR
    6.1.760
    1.
    17xxx
    Windows 7 and Windows Server 2008 R2SP1GDR
    6.1.760
    1.
    21xxx
    Windows 7 and Windows Server 2008 R2SP1LDR
  • GDR service branches contain only those fixes that are widely released to address widespread, very 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 and for Windows 7" 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 x86-based versions of Windows 7
File nameFile versionFile sizeDateTimePlatform
Sdbus.sys6.1.7600.1672284,99218-Dec-201003:24x86
Sdbus.sys6.1.7600.2086184,99218-Dec-201003:25x86
Sdbus.sys6.1.7601.1752784,99217-Dec-201004:53x86
Sdbus.sys6.1.7601.2162484,99218-Dec-201005:56x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Sdbus.sys6.1.7600.16722109,05618-Dec-201003:41x64
Sdbus.sys6.1.7600.20861109,05618-Dec-201003:39x64
Sdbus.sys6.1.7601.17527109,05617-Dec-201008:44x64
Sdbus.sys6.1.7601.21624109,05618-Dec-201006:17x64
For all supported IA-64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Sdbus.sys6.1.7600.16722271,87218-Dec-201003:07IA-64
Sdbus.sys6.1.7600.20861271,87218-Dec-201003:06IA-64
Sdbus.sys6.1.7601.17527271,87217-Dec-201004:15IA-64
Sdbus.sys6.1.7601.21624271,87218-Dec-201006:55IA-64

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:

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

For more information about secure digital card direct memory access support, visit the following Microsoft webpage:

Additional file information

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7
File nameUpdate.mum
File versionNot applicable
File size2,285
Date (UTC)20-Dec-2010
Time (UTC)05:57
PlatformNot applicable
File nameX86_sdbus.inf_31bf3856ad364e35_6.1.7600.16722_none_71f6f9292b7ca83c.manifest
File versionNot applicable
File size2,075
Date (UTC)18-Dec-2010
Time (UTC)06:02
PlatformNot applicable
File nameX86_sdbus.inf_31bf3856ad364e35_6.1.7600.20861_none_725455fa44bb9e73.manifest
File versionNot applicable
File size2,075
Date (UTC)18-Dec-2010
Time (UTC)05:54
PlatformNot applicable
File nameX86_sdbus.inf_31bf3856ad364e35_6.1.7601.17527_none_73e257a1289e92db.manifest
File versionNot applicable
File size2,075
Date (UTC)17-Dec-2010
Time (UTC)07:46
PlatformNot applicable
File nameX86_sdbus.inf_31bf3856ad364e35_6.1.7601.21624_none_7468f38e41bee6a0.manifest
File versionNot applicable
File size2,075
Date (UTC)18-Dec-2010
Time (UTC)08:28
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameAmd64_sdbus.inf_31bf3856ad364e35_6.1.7600.16722_none_ce1594ace3da1972.manifest
File versionNot applicable
File size2,079
Date (UTC)18-Dec-2010
Time (UTC)06:52
PlatformNot applicable
File nameAmd64_sdbus.inf_31bf3856ad364e35_6.1.7600.20861_none_ce72f17dfd190fa9.manifest
File versionNot applicable
File size2,079
Date (UTC)18-Dec-2010
Time (UTC)06:49
PlatformNot applicable
File nameAmd64_sdbus.inf_31bf3856ad364e35_6.1.7601.17527_none_d000f324e0fc0411.manifest
File versionNot applicable
File size2,079
Date (UTC)17-Dec-2010
Time (UTC)12:20
PlatformNot applicable
File nameAmd64_sdbus.inf_31bf3856ad364e35_6.1.7601.21624_none_d0878f11fa1c57d6.manifest
File versionNot applicable
File size2,079
Date (UTC)18-Dec-2010
Time (UTC)09:21
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size2,709
Date (UTC)20-Dec-2010
Time (UTC)05:57
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
File nameIa64_sdbus.inf_31bf3856ad364e35_6.1.7600.16722_none_71f89d1f2b7ab138.manifest
File versionNot applicable
File size2,077
Date (UTC)18-Dec-2010
Time (UTC)06:50
PlatformNot applicable
File nameIa64_sdbus.inf_31bf3856ad364e35_6.1.7600.20861_none_7255f9f044b9a76f.manifest
File versionNot applicable
File size2,077
Date (UTC)18-Dec-2010
Time (UTC)06:49
PlatformNot applicable
File nameIa64_sdbus.inf_31bf3856ad364e35_6.1.7601.17527_none_73e3fb97289c9bd7.manifest
File versionNot applicable
File size2,077
Date (UTC)17-Dec-2010
Time (UTC)08:18
PlatformNot applicable
File nameIa64_sdbus.inf_31bf3856ad364e35_6.1.7601.21624_none_746a978441bcef9c.manifest
File versionNot applicable
File size2,077
Date (UTC)18-Dec-2010
Time (UTC)09:55
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,933
Date (UTC)20-Dec-2010
Time (UTC)05:57
PlatformNot applicable