FIX: The file system is corrupted when you run an application that has a buffer greater than the allocation unit size inside a flash that is inserted into a Windows Embedded CE 6.0-based device

Consider the following scenario:

• You insert a FAT-formatted removable flash into a Windows Embedded CE 6.0-based device.
• An executable application inside the flash contains a buffer that is greater than the allocation unit size.
• You perform one of the following actions while the application is running:
  • You unmount and then mount the flash.
  • The device is suddenly turned off, and then you turn on the same device.
  • You remove the flash suddenly, and then insert it again.
• You start the application again.

In this scenario, the file system in the flash is corrupted and the whole directory is empty.

Note This problem does not occur when the flash is formatted by using the exFAT file system.

Software update information

A supported software update is now available from Microsoft as Windows CE 6.0 Platform Builder Monthly Update (July 2009). You can confirm this by scrolling to the "File information" section of this article. The package file name contains the product version, date, Knowledge Base article number, and processor type. The package file name format is:For example: Wincepb50-060503-kb917590-armv4i.msi is the ARMV4i Windows CE 5.0 Platform Builder fix that is documented in KB article 917590 and that is contained in the May 2006 monthly update. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

Prerequisites

This update is supported only if all previously issued updates for this product have also been installed.

Restart requirement

After you apply this software update, you must perform a clean build of the whole platform. To do this, use one of the following methods:

• On the Build menu, click Clean, and then click Build Platform.
• On the Build menu, click Rebuild Platform.

You do not have to restart the computer after you apply this software update.

Update replacement information

This update does not replace any other updates.

File information

The English version of this software update package 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 item in Control Panel.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: