Microsoft KB Archive/842655

= A used cache buffer is reused for a flash media driver sector in Windows CE =

Article ID: 842655

Article Last Modified on 5/27/2005

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APPLIES TO


 * Microsoft Windows CE .NET 4.2

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SYMPTOMS
A FAT file system cache buffer may be reused when the flash media driver reads a sector that was unmapped in the flash array. For unmapped sectors, when the flash media driver reads no data but does not clear the buffer, old data is returned. When the FAT file system reads directory sector data, the old data may cause the FAT file system to report a directory listing of files that do not exist. Or, the old data may cause the FAT file system to report a directory listing that has garbage data. This problem may occur more frequently on flash media devices that are new or that have been recently formatted.



Software update information
A supported software update is now available from Microsoft as Windows CE 4.2 Core OS QFE 842655. 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 previously issued updates for this product have also been 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 your computer after you apply this update.

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

File information
The English version of this update has the file attributes (or later) 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   Version            Size    File name --

11-Jun-2004 18:53  4.21              781,048  Wincepb42-040611-kb842655-armv4.exe 11-Jun-2004 18:53  4.21              781,048  Wincepb42-040611-kb842655-armv4i.exe 11-Jun-2004 18:53  4.21              789,240  Wincepb42-040611-kb842655-mipsii.exe 11-Jun-2004 18:53  4.21              789,240  Wincepb42-040611-kb842655-mipsii_fp.exe 11-Jun-2004 18:53  4.21              797,432  Wincepb42-040611-kb842655-mipsiv.exe 11-Jun-2004 18:53  4.21              797,432  Wincepb42-040611-kb842655-mipsiv_fp.exe 11-Jun-2004 18:53  4.21              768,760  Wincepb42-040611-kb842655-sh3.exe 11-Jun-2004 18:53  4.21              764,664  Wincepb42-040611-kb842655-sh4.exe 11-Jun-2004 18:53  4.21              744,184  Wincepb42-040611-kb842655-x86.exe The English version of this update has the file attributes (or later) 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   Version            Size    File name --

Path: Public\Common\Oak\Drivers\Fsd\Fatutil\Main 27-May-2004 23:42                     22,999  Formatdisk.cpp

Path: Public\Common\Oak\Lib\Armv4\Debug 27-May-2004 23:40                    230,754  Fal.lib 27-May-2004 23:40                     61,440  Fal.pdb 27-May-2004 23:40                    275,418  Fatutil_main.lib 27-May-2004 23:40                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Armv4\Retail 27-May-2004 23:40                    107,258  Fal.lib 27-May-2004 23:40                     61,440  Fal.pdb 27-May-2004 23:40                    193,426  Fatutil_main.lib 27-May-2004 23:40                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Armv4i\Debug 27-May-2004 23:40                    230,968  Fal.lib 27-May-2004 23:40                     61,440  Fal.pdb 27-May-2004 23:40                    275,906  Fatutil_main.lib 27-May-2004 23:40                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Armv4i\Retail 27-May-2004 23:40                    107,478  Fal.lib 27-May-2004 23:40                     61,440  Fal.pdb 27-May-2004 23:40                    193,758  Fatutil_main.lib 27-May-2004 23:40                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Mipsii\Debug 27-May-2004 23:41                    248,670  Fal.lib 27-May-2004 23:41                     61,440  Fal.pdb 27-May-2004 23:41                    270,140  Fatutil_main.lib 27-May-2004 23:41                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Mipsii\Retail 27-May-2004 23:41                    107,954  Fal.lib 27-May-2004 23:41                     61,440  Fal.pdb 27-May-2004 23:41                    195,756  Fatutil_main.lib 27-May-2004 23:41                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Mipsii_fp\Debug 27-May-2004 23:41                    248,706  Fal.lib 27-May-2004 23:41                     61,440  Fal.pdb 27-May-2004 23:41                    270,188  Fatutil_main.lib 27-May-2004 23:41                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Mipsii_fp\Retail 27-May-2004 23:41                    107,978  Fal.lib 27-May-2004 23:41                     61,440  Fal.pdb 27-May-2004 23:41                    195,844  Fatutil_main.lib 27-May-2004 23:41                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Mipsiv\Debug 27-May-2004 23:41                    251,146  Fal.lib 27-May-2004 23:41                     61,440  Fal.pdb 27-May-2004 23:41                    275,424  Fatutil_main.lib 27-May-2004 23:41                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Mipsiv\Retail 27-May-2004 23:41                    109,496  Fal.lib 27-May-2004 23:41                     61,440  Fal.pdb 27-May-2004 23:41                    198,186  Fatutil_main.lib 27-May-2004 23:41                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Mipsiv_fp\Debug 27-May-2004 23:41                    251,182  Fal.lib 27-May-2004 23:41                     61,440  Fal.pdb 27-May-2004 23:41                    275,472  Fatutil_main.lib 27-May-2004 23:41                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Mipsiv_fp\Retail 27-May-2004 23:41                    109,520  Fal.lib 27-May-2004 23:41                     61,440  Fal.pdb 27-May-2004 23:41                    198,272  Fatutil_main.lib 27-May-2004 23:41                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Sh3\Debug 27-May-2004 23:41                    208,012  Fal.lib 27-May-2004 23:41                     61,440  Fal.pdb 27-May-2004 23:42                    247,220  Fatutil_main.lib 27-May-2004 23:42                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Sh3\Retail 27-May-2004 23:41                     97,820  Fal.lib 27-May-2004 23:41                     61,440  Fal.pdb 27-May-2004 23:42                    180,922  Fatutil_main.lib 27-May-2004 23:42                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Sh4\Debug 27-May-2004 23:42                    207,910  Fal.lib 27-May-2004 23:42                     61,440  Fal.pdb 27-May-2004 23:42                    247,220  Fatutil_main.lib 27-May-2004 23:42                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\Sh4\Retail 27-May-2004 23:42                     97,648  Fal.lib 27-May-2004 23:42                     61,440  Fal.pdb 27-May-2004 23:42                    180,592  Fatutil_main.lib 27-May-2004 23:42                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\X86\Debug 27-May-2004 23:40                    209,184  Fal.lib 27-May-2004 23:40                     61,440  Fal.pdb 27-May-2004 23:40                    230,896  Fatutil_main.lib 27-May-2004 23:40                     86,016  Fatutil_main.pdb

Path: Public\Common\Oak\Lib\X86\Retail 27-May-2004 23:40                     95,058  Fal.lib 27-May-2004 23:40                     61,440  Fal.pdb 27-May-2004 23:40                    166,052  Fatutil_main.lib 27-May-2004 23:40                     86,016  Fatutil_main.pdb



An unmapped sector is the flash array in a logical disk sector that has never contained any data since the media was formatted.



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

Keywords: kbbug kbfix kbqfe KB842655

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