25
GV 312T uses the Windows 7 Embedded operating system. This O/S supports an
Enhanced Write Filter (EWF) that provides the ability to write-protect a run-time image.
By redirecting all write requests to an overlay disk or RAM partition, EWF allows the
run-time image to maintain the appearance of a writeable run-time image. The EWF
prevents accidental file corruption when accessing the system or when the system
suddenly loses power.
The default state of the EWF is disabled allowing full access to files on the unit. When
you have completed development of your application, we recommended enabling the
filter to prevent accidental data corruption. When the filter is enabled, only writes to the
“AppData” directory will be allowed, all other system and program directories will be
blocked.
The EWF is located in the
C:\IPD Install Files
directory. The procedure to
enable
the
filter is as follows:
1.Browse to the C:\IPD Install Files directory
2.Right-click on the file “enable_filter7.bat” and select “run as administrator”
To
disable
the filter (default state) do the following:
1.Browse to the C:\IPD install Files directory
2.Right-click on the file “disable_filter7.bat” and select “run as administrator”
To see the
status
of the filter (default state) do the following:
1.Browse to the C:\IPD install Files directory
2.Right-click on the file “write_Filter_Status.bat” and select “run as administrator”
NOTE: If you have run one of the other bat files and not yet rebooted, it is still showing
the current status from when you booted, not what you have set for the next reboot!
Windows Enhanced Write Filter
