TPC-2230 User Manual
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© National Instruments
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21
Features in Windows Embedded Standard 7
The TPC-2230 supports 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 CFast.
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 Embedded Standard 7 (WES7), search for Info Code
ewftpc
on
ni.com/info
for more information.
When EWF is enabled, the
C:
partition is protected from any disk writing. In this mode, any
changes on the
C:
partition (including modifications to files or the registry) are redirected to
memory. Thus, these changes are discarded in the next system startup. You can enable this mode
manually after finishing all system changes such as installing your applications or adjusting
system settings.
HORM
Hibernate Once, Resume Many (HORM) enables users to create a single hibernation file and
boot to that file repeatedly. Using HORM, you can boot to a known state each time the system
is powered on. HORM works only when EWF is enabled on all system partitions. HORM does
not work with FBWF. Depending on the system state, HORM can reduce boot times.
To enable HORM is in Windows Embedded Standard 7 (WES7), search for Info Code
ewftpc
on
ni.com/info
for more information.
Note
You can programmatically control EWF, FBWF, and HORM using VIs
included with the LabVIEW 2010 or later Touch Panel Module.
Drivers
The TPC-2230 is configured with all necessary drivers installed. If you need to reinstall any
drivers, they are on the HMI Resources USB, which is included in the kit.