The capacity of a Secure Digital (SD) card that is larger than 32 GB is reported incorrectly in Windows 7 and in Windows Server 2008 R2

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:

Operating system

Update

All supported x86-based versions of Windows 7

Download Download the update package now.

All supported x64-based versions of Windows 7

Download Download the update package now.

All supported x64-based versions of Windows Server 2008 R2

Download Download the update package now.

All supported IA-64-based versions of Windows Server 2008 R2

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:

    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

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

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

File name

File version

File size

Date

Time

Platform

Sdbus.sys

6.1.7600.16438

271,360

10-Oct-2009

02:02

IA-64

Sdbus.sys

6.1.7600.20546

271,360

10-Oct-2009

02:08

IA-64

Sffp_sd.sys

6.1.7600.16438

35,840

10-Oct-2009

02:42

IA-64

Sffp_sd.sys

6.1.7600.20546

35,840

10-Oct-2009

02:47

IA-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

File name

Package_1_for_kb976422_bf~31bf3856ad364e35~x86~~6.1.1.0.mum

File version

Not applicable

File size

2,456

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Package_1_for_kb976422~31bf3856ad364e35~x86~~6.1.1.0.mum

File version

Not applicable

File size

3,917

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Package_for_kb976422_rtm_bf~31bf3856ad364e35~x86~~6.1.1.0.mum

File version

Not applicable

File size

1,421

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Package_for_kb976422_rtm~31bf3856ad364e35~x86~~6.1.1.0.mum

File version

Not applicable

File size

1,440

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Update-bf.mum

File version

Not applicable

File size

1,419

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,441

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

X86_sdbus.inf_31bf3856ad364e35_6.1.7600.16438_none_71f225472b7f64c2.manifest

File version

Not applicable

File size

2,075

Date (UTC)

10-Oct-2009

Time (UTC)

11:19

Platform

Not applicable

File name

X86_sdbus.inf_31bf3856ad364e35_6.1.7600.20546_none_726ef19244a6edcf.manifest

File version

Not applicable

File size

2,075

Date (UTC)

10-Oct-2009

Time (UTC)

20:02

Platform

Not applicable

File name

X86_sffdisk.inf_31bf3856ad364e35_6.1.7600.16438_none_a44af1864b1246b1.manifest

File version

Not applicable

File size

2,988

Date (UTC)

11-Oct-2009

Time (UTC)

02:06

Platform

Not applicable

File name

X86_sffdisk.inf_31bf3856ad364e35_6.1.7600.20546_none_a4c7bdd16439cfbe.manifest

File version

Not applicable

File size

2,988

Date (UTC)

11-Oct-2009

Time (UTC)

02:06

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_sdbus.inf_31bf3856ad364e35_6.1.7600.16438_none_ce10c0cae3dcd5f8.manifest

File version

Not applicable

File size

2,079

Date (UTC)

10-Oct-2009

Time (UTC)

14:12

Platform

Not applicable

File name

Amd64_sdbus.inf_31bf3856ad364e35_6.1.7600.20546_none_ce8d8d15fd045f05.manifest

File version

Not applicable

File size

2,079

Date (UTC)

10-Oct-2009

Time (UTC)

11:51

Platform

Not applicable

File name

Amd64_sffdisk.inf_31bf3856ad364e35_6.1.7600.16438_none_00698d0a036fb7e7.manifest

File version

Not applicable

File size

2,992

Date (UTC)

11-Oct-2009

Time (UTC)

02:29

Platform

Not applicable

File name

Amd64_sffdisk.inf_31bf3856ad364e35_6.1.7600.20546_none_00e659551c9740f4.manifest

File version

Not applicable

File size

2,992

Date (UTC)

11-Oct-2009

Time (UTC)

02:29

Platform

Not applicable

File name

Package_1_for_kb976422_bf~31bf3856ad364e35~amd64~~6.1.1.0.mum

File version

Not applicable

File size

2,670

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Package_1_for_kb976422~31bf3856ad364e35~amd64~~6.1.1.0.mum

File version

Not applicable

File size

4,143

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Package_for_kb976422_rtm_bf~31bf3856ad364e35~amd64~~6.1.1.0.mum

File version

Not applicable

File size

1,629

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Package_for_kb976422_rtm~31bf3856ad364e35~amd64~~6.1.1.0.mum

File version

Not applicable

File size

1,652

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Update-bf.mum

File version

Not applicable

File size

1,627

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,653

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File name

Ia64_sdbus.inf_31bf3856ad364e35_6.1.7600.16438_none_71f3c93d2b7d6dbe.manifest

File version

Not applicable

File size

2,077

Date (UTC)

10-Oct-2009

Time (UTC)

17:05

Platform

Not applicable

File name

Ia64_sdbus.inf_31bf3856ad364e35_6.1.7600.20546_none_7270958844a4f6cb.manifest

File version

Not applicable

File size

2,077

Date (UTC)

10-Oct-2009

Time (UTC)

09:01

Platform

Not applicable

File name

Ia64_sffdisk.inf_31bf3856ad364e35_6.1.7600.16438_none_a44c957c4b104fad.manifest

File version

Not applicable

File size

2,990

Date (UTC)

11-Oct-2009

Time (UTC)

00:34

Platform

Not applicable

File name

Ia64_sffdisk.inf_31bf3856ad364e35_6.1.7600.20546_none_a4c961c76437d8ba.manifest

File version

Not applicable

File size

2,990

Date (UTC)

11-Oct-2009

Time (UTC)

00:34

Platform

Not applicable

File name

Package_1_for_kb976422_bf~31bf3856ad364e35~ia64~~6.1.1.0.mum

File version

Not applicable

File size

2,463

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Package_1_for_kb976422~31bf3856ad364e35~ia64~~6.1.1.0.mum

File version

Not applicable

File size

3,928

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Package_for_kb976422_rtm_bf~31bf3856ad364e35~ia64~~6.1.1.0.mum

File version

Not applicable

File size

1,425

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Package_for_kb976422_rtm~31bf3856ad364e35~ia64~~6.1.1.0.mum

File version

Not applicable

File size

1,444

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Update-bf.mum

File version

Not applicable

File size

1,423

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,445

Date (UTC)

11-Oct-2009

Time (UTC)

00:33

Platform

Not applicable

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