HP 4320t Mobile manual Using the Enhanced Write Filter command line utility

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If you use the command line to modify the FBWF, right-click the icon to refresh the status icon display (click anywhere on the screen to close the context menu). The status icon display is refreshed automatically when you make modifications through the FBWF Control Panel utility. The FBWF utility always reflects the current status.

Enhanced Write Filter

The Enhanced Write Filter (EWF) provides a secure environment for your computer by protecting it from undesired flash memory writes (the operating system and functional software components reside in flash memory). The write filter also extends the life of the computer by preventing excessive flash write activity. Instead of allowing writes directly to the flash memory, it intercepts all flash writes and caches them.

To save changes to system configuration settings, you must disable the write filter cache or perform the -commitcommand during the current boot session. Otherwise, the new settings will be lost when the computer is shut down or restarted. If you do not want to make permanent changes, you can enable the write filter.

The write filter cache contents are not lost when you log off and on again (as the same or different user). You can disable the write filter cache after the new logon and still retain the changes.

After you disable the write filter, all future writes during the current boot session are written to the flash with no further caching until the computer is restarted. You can also enable/disable the write filter by using the command line.

NOTE: Only an account with administrator privileges can enable, disable, or commit the enhanced write filter.

NOTE: Always enable the write filter after you have made all of your permanent changes.

Using the Enhanced Write Filter command line utility

CAUTION: When using the -commitcommand, all of the temporary contents are permanently written to the flash memory.

NOTE: Because the Enhanced Write Filter commands are executed on the next boot, you must restart the computer for the command to take effect.

Windows Embedded includes the EWF command line utility. This utility enables you to issue a set of commands to the EWF driver, report the status of each protected volume overlay, and report the format of the overall EWF configurations.

By including the EWF configuration interface in your configuration and building it into your image, you enable use of the EWF command line utility and the corresponding commands.

To use the EWF command line utility, follow these steps:

1.Select Start > Run.

2.Type CMD in the Open field to access the system DOS prompt.

3.Click OK.

4.Type ewfmgr c: at the prompt.

5.Press enter.

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Contents HP 4320t Mobile Thin Client Product notice Safety warning notice Iv Safety warning notice Table of contents Applications Multimedia Inserting a digital card Removing a digital card Hardware upgrades Page Display Identifying the hardwarePointing devices TopLights Buttons, switches, and speakers Fn key KeysEnvironmental Notices FrontLeft side Right sideBottom Wireless antennasIdentifying the labels Component Description File-Based Write Filter Using the File-Based Write Filter command line utilityHP Write Filters Using the File-Based Write Filter status utility Using the File-Based Write Filter configuration interfaceEnhanced Write Filter Using the Enhanced Write Filter command line utilityAll Using the Enhanced Write Filter configuration interfaceUsing the Enhanced Write Filter status utility Drive C ConfigurationLocal drives Drive ZCreating a new user account User accountsMapping network drives Roaming profilesPage TeemTalk Terminal Emulation ApplicationsRemote Desktop Connection HP Remote Graphics Software RGSHP ThinState Deploy HP ThinState CaptureMicrosoft Internet Explorer Windows Media Player Pointing devices and keyboard Using pointing devicesUsing the keyboard Increasing screen brightness Switching the screen imageDisplaying system information Decreasing screen brightnessUsing the keypads Enabling and disabling the embedded numeric keypad Using the embedded numeric keypadSwitching key functions on the embedded numeric keypad Using an optional external numeric keypadPower control and light locations PowerInitiating and exiting Sleep Setting power optionsUsing power-saving states Shutting down the computerInserting or removing the battery Using battery powerUsing the Power Meter Displaying the remaining battery chargeCharging a battery Resolving a low battery level Managing low battery levelsIdentifying low battery levels Disposing of a used battery Conserving battery powerStoring a battery Connecting the AC adapter Using external AC powerPage Multimedia Using multimedia hardwareUsing the audio features Adjusting the volume Using the video featuresUsing the audio-in microphone jack Using the audio-out headphone jackUsing the Hdmi port Using multimedia software Using multimedia softwareOpening preinstalled multimedia software Preventing playback disruptions Using Wlan WirelessAbout integrated wireless devices Using wireless controlsConnecting to a Wlan Setting up a WlanIdentifying a Wlan device Using wireless security featuresModem and LAN Using a modemConnecting a modem cable Connecting a country- or region-specific modem cable adapter Viewing the current location selection Selecting a location settingAdding new locations when traveling Solving travel connection problemsSet the modem to ignore dial tones Connecting to a local area network Protecting the computer Using passwordsSecurity Manual logon Setting passwords in WindowsUsing administrator and user passwords Automatic logonManaging a setup password Setting passwords in Computer SetupUsing a setup password Administrator logonEntering a setup password Installing a security cableSecuring USB ports Connecting hardwareUsing a USB device Connecting a USB deviceUsing the USB Storage Options utility Inserting a digital card Using Media Card Reader cardsRemoving a digital card Inserting an ExpressCard Using ExpressCardsConfiguring an ExpressCard Removing an ExpressCard Handling drives Hardware upgradesIdentifying installed drives Using optical drives select models onlyRemoving an optical disc CD or DVD Inserting an optical disc CD or DVDWhen the disc tray does not open When the disc tray opensUsing optional external devices Using external drivesInserting and replacing memory modules Using an optional external MultiBay or external MultiBayPage Page Page Page Page Page Enabling boot devices in Computer Setup MultiBootAbout the boot order device Choosing MultiBoot preferences Considering boot order changesSetting a MultiBoot Express prompt Setting a new boot order in Computer SetupDynamically choosing a boot device using the F9 prompt Entering MultiBoot Express preferences Navigating and selecting in Computer Setup Computer SetupStarting Computer Setup Using Computer SetupFile menu Computer Setup menusRestoring factory settings in Computer Setup Security menu System Configuration menuComputer Setup menus Computer Setup Traveling and shipping Cleaning the displayCleaning the keyboard Routine carePage USB IndexHdmi Hdmi USB
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