Functions
8.5 Protective functions for data carriers
CPU 1515SP PC (F)
82 Manual, 05/2017, A5E32701806-AC
File-Based Write Filter (FBWF)
Purpose and function
The FBWF allows you to write-protect specific files and folders of a partition.
FBWF is enabled by default on the CPU 1515SP PC (F).
The FBWF is activated by means of the Windows console application fbwfmgr.exe.
If both write filters are activated, the EWF blocks direct write access of the FBWF.
Data get lost after a restart of CPU 1515SP PC (F).
Activate
of the two write filters.
Console application fbwfmgr.exe
The application is called via the Windows command line (Command Prompt).
The following functions, among others, are available for setting, switching on and switching
off the FBWF:
Table 8- 3 File-Based Write Filter
Activate FBWF after the next restart
fbwfmgr /commit c: \<Path>\<File Name>
fbwfmgr /addexclusion c:
\<Path>\<FileName.ext>
fbwfmgr /addexclusion c: \<Path>
fbwfmgr /removeexclusion c:
\<Path>\<FileName.ext>
fbwfmgr /removeexclusion c: \<Path>
The correct notation is as follows:
Drive letter: space character "\" relative file path
The write protection commands become effective only after a restart.