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are not known, the changes can be made after disabling the File Based Write Filter using the File Based
Write Filter Control dialog box, and then re-enabling the File Based Write Filter, For more information,
see Setting the File Based Write Filter Controls.
The File Based Write Filter can be controlled either through the command line (fbwfmgr) or by double-
clicking the File Based Write Filter icon in the Administrator system tray. The File Based Write Filter can
flush specified files to the flash from cache only up to the point when the commit is performed; if more
writes are performed on the files that have been flushed, then these files must be flushed/committed
again if the additional changes also need to be preserved.
The File Based Write Filter can also be enabled/disabled through the command line or through the File
Based Write Filter Enable/Disable desktop icons. The status (enabled/disabled) of the File Based Write
Filter is displayed by the File Based Write Filter status icon in the system tray green indicates that the File
Based Write Filter is enabled and red indicates that the File Based Write Filter is disabled.
NOTE:
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
Support.
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:
fbwfmgr
With no arguments — Displays the File Based Write Filter configuration for the current session and the
next.
fbwfmgr /enable
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