HP Thin Client PC t1000 Quick Reference Guide for Microsoft Windows NTe-based - Page 19

Appendix A - Application Notes Write Filter The write filter provides a secure environment for thin-client computing. It does this by protecting the terminal 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 terminal 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. The intercepted flash writes stored in cache are available as long as the terminal remains active but will be lost when the terminal is rebooted or shut down. To preserve the results of writes to the registry, favorites, cookies, and so on, the contents of the cache can be "flushed" (transferred) to the flash on demand by Upgrade, Rapport, Extract, or manually using the Write Filter Device Control dialog box (Start > Programs> Write Filter). After the write filter has flushed the cache, all future writes during the current boot session are to the flash, with no further caching until a reboot occurs. Joining a Domain As an administrator you may join the terminal to a domain using the Network utility in the Control Panel. Drive Z: Drive Z: is the onboard volatile memory (Ms-ramdrive) on the logic board. Because drive Z: is volatile memory, it is recommended that you do not use this drive to save data that you want to retain. 16 Quick Reference Guide