Article ID: 976422 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You connect a Secure Digital (SD) card that is larger than 32 GB to a computer that is running Windows 7 or Windows Server 2008 R2.
  • You try to format the SD card, or try to check its properties.
In this scenario, the capacity of the SD card is reported incorrectly.

Note This issue also occurs on a computer that is running Windows Vista or Windows Server 2008.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
975823 The capacity of a Secure Digital (SD) card that is larger than 32 GB is reported incorrectly in Windows Vista and in Windows Server 2008

CAUSE

This issue occurs because the capacity of SD cards that are larger than 32 GB is calculated incorrectly in Windows 7 and in Windows Server 2008 R2.

Information about the capacity of SD cards is provided by the Card Specific Data (CSD) register. If the capacity of an SD card is equal to or lower than 32 GB, the "C_SIZE" (device size reserved) field in the CSD register is 12 bits long (with 10 bits high, and 2 bits low). If the capacity of an SD card is greater than 32 GB, the "C_SIZE" field in the CSD register is 22 bits long (with 6 bits high, and 16 bits low).

In Windows 7 and in Windows Server 2008 R2, the capacity of SD cards that are equal to or lower than 32 GB is calculated correctly. However, for SD cards that are larger than 32 GB, the high bits are shifted incorrectly by 6 bits instead of 16 bits. Therefore, the capacity is calculated incorrectly.

RESOLUTION

 An update is available to resolve this problem.

Update information

How to obtain this update

The following files are available for download from the Microsoft Download Center:
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Operating systemUpdate
All supported x86-based versions of Windows 7
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Download
Download the update package now.
All supported x64-based versions of Windows 7
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Download
Download the update package now.
All supported x64-based versions of Windows Server 2008 R2
Collapse this imageExpand this image
Download
Download the update package now.
All supported IA-64-based versions of Windows Server 2008 R2
Collapse this imageExpand this image
Download
Download the update package now.
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Prerequisites

To apply this update, you must be running Windows 7 or Windows Server 2008 R2.

Registry information

To use the update 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 update.

Update replacement information

This update does not replace a previously released update.

File information

The global version of this update 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
Important Windows 7 updates and Windows Server 2008 R2 updates are included in the same packages. However, updates on the Hotfix Request page are listed under both operating systems. To request the update package that applies to one or both operating systems, select the update 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 update 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:
    Collapse this tableExpand this table
    VersionProductMilestoneService branch
    6.1.760 0.16xxxWindows 7 and Windows Server 2008 R2RTMGDR
    6.1.760 0.20xxxWindows 7 and Windows Server 2008 R2RTMLDR
  • 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 and for Windows 7" section. MUM 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 7
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File nameFile versionFile sizeDateTimePlatform
Sdbus.sys6.1.7600.1643884,99210-Oct-200902:31x86
Sdbus.sys6.1.7600.2054684,99210-Oct-200902:28x86
Sffp_sd.sys6.1.7600.1643812,80010-Oct-200902:57x86
Sffp_sd.sys6.1.7600.2054612,80010-Oct-200902:55x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Sdbus.sys6.1.7600.16438109,05610-Oct-200902:41x64
Sdbus.sys6.1.7600.20546109,05610-Oct-200902:41x64
Sffp_sd.sys6.1.7600.1643814,33610-Oct-200903:17x64
Sffp_sd.sys6.1.7600.2054614,33610-Oct-200903:18x64
For all supported IA-64-based versions of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Sdbus.sys6.1.7600.16438271,36010-Oct-200902:02IA-64
Sdbus.sys6.1.7600.20546271,36010-Oct-200902:08IA-64
Sffp_sd.sys6.1.7600.1643835,84010-Oct-200902:42IA-64
Sffp_sd.sys6.1.7600.2054635,84010-Oct-200902:47IA-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 SD cards, visit the following SD Group Web site:
https://www.sdcard.org/developers/
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
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

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
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File namePackage_1_for_kb976422_bf~31bf3856ad364e35~x86~~6.1.1.0.mum
File versionNot applicable
File size2,456
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File namePackage_1_for_kb976422~31bf3856ad364e35~x86~~6.1.1.0.mum
File versionNot applicable
File size3,917
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File namePackage_for_kb976422_rtm_bf~31bf3856ad364e35~x86~~6.1.1.0.mum
File versionNot applicable
File size1,421
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File namePackage_for_kb976422_rtm~31bf3856ad364e35~x86~~6.1.1.0.mum
File versionNot applicable
File size1,440
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File nameUpdate-bf.mum
File versionNot applicable
File size1,419
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,441
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File nameX86_sdbus.inf_31bf3856ad364e35_6.1.7600.16438_none_71f225472b7f64c2.manifest
File versionNot applicable
File size2,075
Date (UTC)10-Oct-2009
Time (UTC)11:19
PlatformNot applicable
File nameX86_sdbus.inf_31bf3856ad364e35_6.1.7600.20546_none_726ef19244a6edcf.manifest
File versionNot applicable
File size2,075
Date (UTC)10-Oct-2009
Time (UTC)20:02
PlatformNot applicable
File nameX86_sffdisk.inf_31bf3856ad364e35_6.1.7600.16438_none_a44af1864b1246b1.manifest
File versionNot applicable
File size2,988
Date (UTC)11-Oct-2009
Time (UTC)02:06
PlatformNot applicable
File nameX86_sffdisk.inf_31bf3856ad364e35_6.1.7600.20546_none_a4c7bdd16439cfbe.manifest
File versionNot applicable
File size2,988
Date (UTC)11-Oct-2009
Time (UTC)02:06
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_sdbus.inf_31bf3856ad364e35_6.1.7600.16438_none_ce10c0cae3dcd5f8.manifest
File versionNot applicable
File size2,079
Date (UTC)10-Oct-2009
Time (UTC)14:12
PlatformNot applicable
File nameAmd64_sdbus.inf_31bf3856ad364e35_6.1.7600.20546_none_ce8d8d15fd045f05.manifest
File versionNot applicable
File size2,079
Date (UTC)10-Oct-2009
Time (UTC)11:51
PlatformNot applicable
File nameAmd64_sffdisk.inf_31bf3856ad364e35_6.1.7600.16438_none_00698d0a036fb7e7.manifest
File versionNot applicable
File size2,992
Date (UTC)11-Oct-2009
Time (UTC)02:29
PlatformNot applicable
File nameAmd64_sffdisk.inf_31bf3856ad364e35_6.1.7600.20546_none_00e659551c9740f4.manifest
File versionNot applicable
File size2,992
Date (UTC)11-Oct-2009
Time (UTC)02:29
PlatformNot applicable
File namePackage_1_for_kb976422_bf~31bf3856ad364e35~amd64~~6.1.1.0.mum
File versionNot applicable
File size2,670
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File namePackage_1_for_kb976422~31bf3856ad364e35~amd64~~6.1.1.0.mum
File versionNot applicable
File size4,143
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File namePackage_for_kb976422_rtm_bf~31bf3856ad364e35~amd64~~6.1.1.0.mum
File versionNot applicable
File size1,629
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File namePackage_for_kb976422_rtm~31bf3856ad364e35~amd64~~6.1.1.0.mum
File versionNot applicable
File size1,652
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File nameUpdate-bf.mum
File versionNot applicable
File size1,627
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,653
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameIa64_sdbus.inf_31bf3856ad364e35_6.1.7600.16438_none_71f3c93d2b7d6dbe.manifest
File versionNot applicable
File size2,077
Date (UTC)10-Oct-2009
Time (UTC)17:05
PlatformNot applicable
File nameIa64_sdbus.inf_31bf3856ad364e35_6.1.7600.20546_none_7270958844a4f6cb.manifest
File versionNot applicable
File size2,077
Date (UTC)10-Oct-2009
Time (UTC)09:01
PlatformNot applicable
File nameIa64_sffdisk.inf_31bf3856ad364e35_6.1.7600.16438_none_a44c957c4b104fad.manifest
File versionNot applicable
File size2,990
Date (UTC)11-Oct-2009
Time (UTC)00:34
PlatformNot applicable
File nameIa64_sffdisk.inf_31bf3856ad364e35_6.1.7600.20546_none_a4c961c76437d8ba.manifest
File versionNot applicable
File size2,990
Date (UTC)11-Oct-2009
Time (UTC)00:34
PlatformNot applicable
File namePackage_1_for_kb976422_bf~31bf3856ad364e35~ia64~~6.1.1.0.mum
File versionNot applicable
File size2,463
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File namePackage_1_for_kb976422~31bf3856ad364e35~ia64~~6.1.1.0.mum
File versionNot applicable
File size3,928
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File namePackage_for_kb976422_rtm_bf~31bf3856ad364e35~ia64~~6.1.1.0.mum
File versionNot applicable
File size1,425
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File namePackage_for_kb976422_rtm~31bf3856ad364e35~ia64~~6.1.1.0.mum
File versionNot applicable
File size1,444
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File nameUpdate-bf.mum
File versionNot applicable
File size1,423
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,445
Date (UTC)11-Oct-2009
Time (UTC)00:33
PlatformNot applicable

Properties

Article ID: 976422 - Last Review: January 30, 2012 - Revision: 6.0
APPLIES TO
  • Windows 7 Starter
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Enterprise
  • Windows 7 Professional
  • Windows 7 Ultimate
  • Windows Web Server 2008 R2
  • Windows Server 2008 R2 Standard
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Datacenter
Keywords: 
atdownload kbqfe kbfix kbexpertiseadvanced kbsurveynew KB976422

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