Using The Enhanced Write Filter Configuration Interface - HP ProBook 4320t Administrator's Reference Manual

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 by using the Windows Control Panel.
To access the EWF interface, follow these steps:
1. Log on as an administrator.
2. Select Start > Control Panel.
3. Select HP WriteFilter Configuration.
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
Commits all current-level data in the overlay to the protected volume, and resets the current
overlay value to 1.
14 Chapter 2 HP Write Filters