When you enter the
ewfmgr [boot command]
syntax, use the following commands in the boot
command variable of the command line:
●
-all
Displays information about all protected volumes and performs a command, such as disable,
enable, and commit, on each volume, if specified.
●
-commit
Commits all current level data in the overlay to the protected volume, and resets the current overlay
value to 1. You can combine
-commit
with the
-disable
command to commit and then disable.
●
-disable
Disables the overlay on the specified protected volume.
●
-enable
Enables the EWF so that data written to the protected media is cached in the overlays. The current
overlay level becomes 1 as soon as EWF is started, and a new overlay is created at level 1.
●
-commitanddisable
Commits data in the overlay upon shutdown and disables EWF after the system reboots.
Using the Enhanced Write Filter configuration interface
In addition to the DOS command-line tool, Windows Embedded includes an EWF configuration interface.
You can access the EWF interface through the Windows Control Panel.
To access the EWF interface, follow these steps:
1.
Log on as an administrator.
2.
Select
Start
>
Control Panel
>
Other Control Panel Options
.
3.
Select
HP WriteFilter Configuration
.
4.
Use the
EWF Main
tab to select Write Filter options.
The EWF interface includes the following buttons:
●
Enable/Disable EWF
Enables the Enhanced Write Filter so that data written to the protected media is cached in the
overlays. Disables the overlay on the specified protected volume.
●
Overlay Configuration
Displays the overlay information and is a combination of the information supplied when executing
ewfmgr.exe c: -Description
and
ewfmgr.exe c: -Gauge
from the DOS prompt.
●
Clear Boot Command
Clears the boot command from the DOS prompt.
●
Commit Data to Volume
Enhanced Write Filter
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