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:
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.
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
How to obtain Microsoft support files from online services
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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:
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Version
Product
Milestone
Service branch
6.1.760
0.16xxx
Windows 7 and Windows Server 2008 R2
RTM
GDR
6.1.760
0.20xxx
Windows 7 and Windows Server 2008 R2
RTM
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 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 name
File version
File size
Date
Time
Platform
Sdbus.sys
6.1.7600.16438
84,992
10-Oct-2009
02:31
x86
Sdbus.sys
6.1.7600.20546
84,992
10-Oct-2009
02:28
x86
Sffp_sd.sys
6.1.7600.16438
12,800
10-Oct-2009
02:57
x86
Sffp_sd.sys
6.1.7600.20546
12,800
10-Oct-2009
02:55
x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
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File name
File version
File size
Date
Time
Platform
Sdbus.sys
6.1.7600.16438
109,056
10-Oct-2009
02:41
x64
Sdbus.sys
6.1.7600.20546
109,056
10-Oct-2009
02:41
x64
Sffp_sd.sys
6.1.7600.16438
14,336
10-Oct-2009
03:17
x64
Sffp_sd.sys
6.1.7600.20546
14,336
10-Oct-2009
03:18
x64
For all supported IA-64-based versions of Windows Server 2008 R2
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