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National Instruments Corporation
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TPC-2206/TPC-2212/TPC-2215 User Manual
C
Features in Windows XP
Embedded and Windows
Embedded Standard 7
The TPC-22
xx
supports the Windows XP Embedded platform (commonly
abbreviated XPe), which is a componentized version of the Windows XP
Professional edition, and Windows Embedded Standard 7 (WES7).
EWF and FBWF
Enhanced Write Filter (EWF) provides an upper filter in the storage device
driver stack that redirects disk write operations to volatile (RAM) or
nonvolatile (disk) storage. EWF protects a volume from write access and
offers the following benefits:
•
Write-protects one or more partitions on your system.
•
Enables read-only media, such as CD-ROM or flash, to boot and run.
•
Prolongs the lifespan of write-sensitive storage, such as
CompactFlash.
File Based Write Filter (FBWF) also redirects disk write operations to
volatile (RAM) or nonvolatile (disk) storage. Where EWF protects entire
volumes from writes, FBWF protects only individual files and directories.
Although FBWF is not as robust as EWF, because EWF protects entire
volumes, it is very useful when you need to write to specific files and have
those changes persist between reboots.
You can enable and disable EWF and FBWF only between reboots.
To disable/enable EWF/FBWF in Windows XP Embedded, go to
Start»All
Programs»Utilities
and select the EWF tab. The default setting is disabled
for both.
To disable/enable EWF/FBWF in Windows Embedded Standard 7
(WES7), search for Info Code
ewftpc
on
ni.com/info
for more
information.