• Contents of the File Based Write Filter cache should never be flushed if it is eighty-percent or
more full. The Administrator should periodically check the status of the cache and restart the
thin client if the cache is more than eighty percent full. Note that alternatively an administrator
can configure the client to reboot if the FBWF cache is 90 percent or more full. By default the
client is configured to reboot if the FBWF cache usage exceeds 90 percent.
• A Terminal Services Client Access License (TSCAL) is always preserved regardless of File Based
Write Filter state (enabled or disabled). If you want to have other registry settings preserved
regardless of File Based Write Filter state, contact support for help as described in Technical
WARNING: It is highly recommended that Windows write filter is kept enabled during normal use
of thin clients. It should be disabled only by administrators while making necessary changes.
Extended use with write filters turned off can reduce the life of your flash drive. It is a good
practice to have write filters enabled to ensure device security.
This section provides the following information on using the File Based Write Filter:
•Changing Passwords with the File Based Write Filter.
•Running File Based Write Filter Command Line Options.
•Enabling and Disabling the File Based Write Filter Using the Desktop Icons
•Setting the File Based Write Filter Controls
Running File Based Write Filter Command–Line Options
There are several command lines you can use to control the File Based Write Filter. Command–line
arguments cannot be combined.
Use the following guidelines for the command–line option for the File Based Write Filter. You can also
use the commands if you open Command Prompt window by entering command in the Run box:
With no arguments — Displays the File Based Write Filter configuration for the current session and the
Enables the File Based Write Filter after the next system restart. The File Based Write Filter status icon
is green when the File Based Write Filter is enabled.
Disables the File Based Write Filter after the next system restart. The File Based Write Filter status icon
remains red while disabled.
•fbwfmgr /commit C: <file_path>
Commits the changes made to the file to the underlying media. Note that there is a single space
between volume name and file_path. The file path must be an absolute path starting with \.
For example, to commit a file C:\Program Files\temp.txt the command would be fbwfmgr /commit C: