Microsoft KB Archive/904255

= FIX: A device that is running Windows CE cannot recognize an externally mounted FAT file system volume =

Article ID: 904255

Article Last Modified on 7/25/2006

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APPLIES TO


 * Microsoft Windows CE 5.0

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SYMPTOMS
A device that is running Microsoft Windows CE cannot recognize an externally mounted FAT file system volume as a valid FAT volume.



CAUSE
Nonstandard FAT volumes are not recognized.



Software update information
A supported software update is now available from Microsoft as Windows CE 5.0 Core OS QFE 904255. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

837392 How to locate core operating system fixes for Microsoft Windows CE Platform Builder products

Prerequisites
This update is supported only if all previous updates are installed.

Restart requirement
After you install this update, you must perform a clean build of the whole platform. To clean the platform, click Clean on the Build menu. To build the platform, click Build Platform on the Build menu. You do not have to restart the computer after you apply this update.

Update replacement information
This update does not replace any other updates.

File information
The English version of this package has the file attributes (or later file attributes) that are listed in the following table.   Date         Time   Size       File name --  05-Aug-2005  21:42  1,105,920  Wincepb50-050805-kb904255-armv4i.msi 05-Aug-2005 21:42  1,153,024  Wincepb50-050805-kb904255-mipsii.msi 05-Aug-2005 21:42  1,153,024  Wincepb50-050805-kb904255-mipsii_fp.msi 05-Aug-2005 21:42  1,168,896  Wincepb50-050805-kb904255-mipsiv.msi 05-Aug-2005 21:42  1,168,896  Wincepb50-050805-kb904255-mipsiv_fp.msi 05-Aug-2005 21:42  1,083,904  Wincepb50-050805-kb904255-sh4.msi 05-Aug-2005 21:42  1,013,760  Wincepb50-050805-kb904255-x86.msi The English version of this update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time   Size     File name Path: Public\Common\Oak\Lib\Armv4i\Debug 28-Jul-2005 18:01  573,644  Fatfsd.lib 28-Jul-2005 18:01  666,430  Tfat.lib

Path: Public\Common\Oak\Lib\Armv4i\Retail 28-Jul-2005 18:01  300,762  Fatfsd.lib 28-Jul-2005 18:01  337,392  Tfat.lib

Path: Public\Common\Oak\Lib\Mipsii\Debug 28-Jul-2005 18:01  578,544  Fatfsd.lib 28-Jul-2005 18:01  668,564  Tfat.lib

Path: Public\Common\Oak\Lib\Mipsii\Retail 28-Jul-2005 18:01  307,668  Fatfsd.lib 28-Jul-2005 18:01  344,302  Tfat.lib

Path: Public\Common\Oak\Lib\Mipsii_fp\Debug 28-Jul-2005 18:02  578,666  Fatfsd.lib 28-Jul-2005 18:02  668,694  Tfat.lib

Path: Public\Common\Oak\Lib\Mipsii_fp\Retail 28-Jul-2005 18:02  307,792  Fatfsd.lib 28-Jul-2005 18:02  344,380  Tfat.lib

Path: Public\Common\Oak\Lib\Mipsiv\Debug 28-Jul-2005 18:02  587,562  Fatfsd.lib 28-Jul-2005 18:02  679,782  Tfat.lib

Path: Public\Common\Oak\Lib\Mipsiv\Retail 28-Jul-2005 18:02  310,886  Fatfsd.lib 28-Jul-2005 18:02  348,074  Tfat.lib

Path: Public\Common\Oak\Lib\Mipsiv_fp\Debug 28-Jul-2005 18:03  587,684  Fatfsd.lib 28-Jul-2005 18:03  679,912  Tfat.lib

Path: Public\Common\Oak\Lib\Mipsiv_fp\Retail 28-Jul-2005 18:02  311,002  Fatfsd.lib 28-Jul-2005 18:02  348,148  Tfat.lib

Path: Public\Common\Oak\Lib\Sh4\Debug 28-Jul-2005 18:01  490,752  Fatfsd.lib 28-Jul-2005 18:01  567,324  Tfat.lib

Path: Public\Common\Oak\Lib\Sh4\Retail 28-Jul-2005 18:00  280,066  Fatfsd.lib 28-Jul-2005 18:00  312,180  Tfat.lib

Path: Public\Common\Oak\Lib\X86\Debug 28-Jul-2005 18:00  481,500  Fatfsd.lib 28-Jul-2005 18:00  556,648  Tfat.lib

Path: Public\Common\Oak\Lib\X86\Retail 28-Jul-2005 18:00  267,536  Fatfsd.lib 28-Jul-2005 18:00  299,106  Tfat.lib



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
Windows CE verifies that a volume has a valid FAT header. Volumes that are created by some disk utilities do not strictly comply with the FAT format and are not recognized by Windows CE. To make Windows CE recognize these volumes after this update is installed, you must set the following registry value. [HKEY_LOCAL_MACHINE\System\StorageManager\FATFS] &quot;BypassFATSectorCheck&quot;=dword:1 For more information, 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

Keywords: kbbug kbfix kbqfe kbpubtypekc KB904255

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