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.

In order 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 using the command line.

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

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

Using the Enhanced Write Filter command line control

CAUTION: Terminal Administrators should use Microsoft Windows NT file security to prevent undesired usage of these commands.

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 control. This control 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 control and the corresponding commands.

To use the EWF using the command line:

1.Select Start > Run.

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

3.Click OK.

4.Type ewfmgr c:.

5.Press enter.

14 Chapter 2 HP Write Filters

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HP 4410t Mobile manual Using the Enhanced Write Filter command line control
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4410t Mobile specifications

The HP 4410t Mobile is a versatile mobile workstation designed to meet the demands of professionals who require both power and portability. It combines a sleek design with robust performance capabilities, making it an ideal choice for users who need reliable computing on the go.

At the heart of the HP 4410t is its powerful Intel Core processor. Available in various configurations, this processor ensures smooth multitasking and efficient performance. With options for different generations, users can select a model that best fits their computing requirements. The laptop's memory capacity can be expanded, allowing for more applications to run simultaneously, which is a crucial feature for professionals in design, engineering, and technical fields.

The display of the HP 4410t is another standout feature. It boasts a 14-inch HD display that provides crisp visuals and vibrant colors, making it ideal for design work and presentations. The anti-glare technology ensures that users can work comfortably even in brightly lit environments. This feature is particularly beneficial for professionals who spend extended hours in front of their screens.

In terms of storage, the HP 4410t offers a range of options, including solid-state drives (SSDs) that provide faster data access speeds compared to traditional hard drives. This enhances the overall responsiveness of the system, allowing users to boot up quickly and load applications with minimal delay.

Connectivity is also a strong point for the HP 4410t. It includes multiple USB ports, including USB 3.0 for high-speed device connections, HDMI for video output, and Ethernet for wired networking. This range of ports ensures that users can connect to various peripherals and networks seamlessly.

The HP 4410t is built with durability in mind. It features a robust chassis designed to withstand the rigors of mobile use. The spill-resistant keyboard and reinforced hinges are testament to its longevity and reliability.

Moreover, security is a priority in the HP 4410t. It comes equipped with features such as a fingerprint reader and advanced encryption options, ensuring that sensitive data remains protected.

Finally, the mobility of the HP 4410t is enhanced by its lightweight design and long battery life, making it an excellent choice for professionals who are frequently on the move. In summary, the HP 4410t Mobile combines power, performance, and portability, making it a reliable workstation for anyone needing high-performance computing while on the go.
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