HP t5400 Microsoft® Windows Embedded Standard 2009 (WES) v. 5.1.910 a - Page 45

File-Based Write Filter Manager, Benefits of the File-Based Write Filter

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File-Based Write Filter Manager WES 2009 includes the File-Based Write Filter (FBWF) console application command-line tool, fbwfmgr.exe. In addition to the DOS command-line tool, the WES 2009 image includes a Write filter GUI. FBWF maintains the appearance of read and write access to write-sensitive or read-only storage to the operating system, making read and write access transparent to applications. Benefits of the File-Based Write Filter The FBWF provides a secure environment for thin client computing. It does this by protecting the thin client from undesired flash memory writes (flash memory is where the operating system and functional software components reside). The write filter also extends the life of the thin client by preventing excessive flash write activity. It maintains the appearance of read and write access to write-sensitive or read-only storage to the operating system, making read and write access transparent to applications. File and/or folder exclusions can be configured to allow certain changes to persist, while preventing others from writing to disk. File-Based Write Filter Status Service This service creates an icon in the System Tray that shows the status of FBWF. The FBWF Status icon will appear as a red 'lock' when disabled and a green 'lock' when enabled. Status Red Green Yellow Yellow with Red 'X' Description Disabled Enabled Commit Mode Write Filter Corrupted Example If you are logged on as Administrator, you can change the status of FBWF by right-clicking on the icon and selecting the desired FBWF status. ENWW Write Filters 37

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File-Based Write Filter Manager
WES 2009 includes the File-Based Write Filter (FBWF) console application command-line tool,
fbwfmgr.exe. In addition to the DOS command-line tool, the WES 2009 image includes a Write filter
GUI. FBWF maintains the appearance of read and write access to write-sensitive or read-only
storage to the operating system, making read and write access transparent to applications.
Benefits of the File-Based Write Filter
The FBWF provides a secure environment for thin client computing. It does this by protecting the thin
client from undesired flash memory writes (flash memory is where the operating system and
functional software components reside). The write filter also extends the life of the thin client by
preventing excessive flash write activity. It maintains the appearance of read and write access to
write-sensitive or read-only storage to the operating system, making read and write access
transparent to applications. File and/or folder exclusions can be configured to allow certain changes
to persist, while preventing others from writing to disk.
File-Based Write Filter Status Service
This service creates an icon in the System Tray that shows the status of FBWF. The FBWF Status
icon will appear as a red 'lock' when disabled and a green 'lock' when enabled.
Status
Description
Example
Red
Disabled
Green
Enabled
Yellow
Commit Mode
Yellow with Red 'X'
Write Filter Corrupted
If you are logged on as Administrator, you can change the status of FBWF by right-clicking on the
icon and selecting the desired FBWF status.
ENWW
Write Filters
37