HP compaq t5000 Manual De Usuario

The Enhanced Write Filter Manager provides a secure environment 
for thin-client computing by protecting the thin client 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 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.

The intercepted flash writes that are stored in cache are available as 
long as the thin client remains active, but are lost when you reboot or 
shut down the unit. To preserve the results of writes to the registry, 
favorites, cookies, and so forth, you can transfer the contents of the 
cache to the flash on demand using the Altiris Deployment Solution 
software or manually using the Enhanced Write Filter Manager.

After you disable the write filter, all future writes during the current 
boot session are written to the flash with no further caching until 
reboot. You can also enable/disable the write filter using the 
command line. Always enable the writer filter after you have made all 
of your permanent changes.

The administrator should periodically check the status of the cache 
and reboot the thin client if the cache is more than 80 percent full.

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CAUTION: Never disable the write filter cache if it is more than 

80 percent full.

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To avoid flash corruption when administering the thin client for 
permanent changes, HP strongly recommends that you disable the 
write filter cache before making permanent modifications to the 
system. Remember to enable the writer filter after making all of your 
changes.

The following section describes how you can manipute the write filter 
through the command line.