User manual SONY VAIO VGN-SR240J/H

[. . . ] 5 DOS Command-line Tool Boot Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Using Boot Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1 Using the Enhanced Write Filter Abstract This paper contains instructions for using the Enhanced Write Filter console application command-line tool, the Enhanced Write Filter GUI and the Enhanced Write Filter status service. Microsoft Windows XP Embedded includes the Enhanced Write Filter (EWF) console application command-line tool, Ewfmgr. exe. [. . . ] Microsoft Windows XP Embedded includes the Enhanced Write Filter (EWF) console application command-line tool, Ewfmgr. exe. In addition to the DOS command-line tool, the Windows XP Embedded image includes an Enhanced Write Filter GUI. The EWF allows the operating system (OS) to boot from a disk volume residing on any read-only media or write-protected hard drive while appearing to have read/write access to the OS. The EWF saves all writes to another storage location called an overlay. Changes made to the overlay will not be committed to the flash memory unless the EWF has been disabled or the user performs an intentional commit. The EWF manager console application can be used 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 manager console application component in your configuration and building it into your run-time image, you enable the use of Ewfmgr. exe and the corresponding commands. Introduction Benefits of the Enhanced Write Filter The EWF provides a secure environment for thin client computing. It does this by protecting the thin client from undesired flash memory writes (flash memory is where the operating system and functional software components reside). The write filter also extends the life of the thin client by preventing excessive flash write activity. It gives the appearance of read-write access to the flash by employing a cache to intercept all flash writes and returning success to the process that requested the I/O. This button is the same as executing ewfmgr. exe c: -NoCmd from the DOS prompt. This button is the same as executing ewfmgr. exe c: -Commit from the DOS prompt. Disable EWF Overlay Configuration Clear Boot Command Commit Data to Volume NOTE: When using the Commit boot command, all the temporary contents will be permanently written to the flash memory. In addition, all content accessed (and changes made) after running Commit, but before rebooting the system, will be written to the flash memory as well. This includes changes made during any number of login/logout sessions before the next reboot. 5 Using the Enhanced Write Filter DOS Commandline Tool Boot Commands The following table lists the EWF boot commands that are supported. Boot Command All Description Displays information about all protected volumes and performs a command, such as disable, enable, and commit, on each volume if specified. Commits all current level data in the overlay to the protected volume, and resets the current overlay level to 1 upon shutdown. Allows user to write to the image after the next reboot. Prevents the user from writing to the image after the next reboot. Combination of the "Commit" and "Disable" commands. This command will commit data in the overlay upon shutdown. [. . . ] Combination of the "Commit" and "Disable" commands. This command will commit data in the overlay upon shutdown. Additionally, EWF will be disabled after the system reboots. Commit Disable Enable Commitanddisable NOTE: When using the Commit boot command, all the temporary contents will be permanently written to the flash memory. In addition, all content accessed (and changes made) after running Commit, but before rebooting the system, will be written to the flash memory as well. [. . . ]