A-2-3 Unified Write Filter - Omron NYB17-11 User Manual

Appendices
A-2-3
Unified Write Filter
The Unified Write Filter (UWF) is applicable to Box PCs with a Windows 10 operating system.
The UWF intercepts disk changes and stores them into a memory overlay in RAM memory instead of
applying them to the original volume.
Additional Information
Refer to the Microsoft Developer Network (MSDN) for detailed information.
Application
UWF provides the following benefits:
• Write-protect one or more partitions on a system.
• Make it possible to revert changes and revert to the original disk content.
• Enable booting from read-only media.
By redirecting all write requests to RAM the run-time image maintains the appearance of a writable
run-time image.
• Improve the file system performance when using relatively slow storage.
• Minimize write actions to the disk.
For example, minimize write access to flash memory. Write cycles on flash memory are limited for
technical reasons.
Usage
UWF is included in the Windows 10 image and disabled by default. The configuration of this compo-
nent can be defined with the command line tool
To run to UWF Manager, open the Command Prompt with Administrator rights.
Command
uwfmgr.exe get-config
uwfmgr.exe filter
uwfmgr.exe enable
uwfmgr.exe disable
uwfmgr.exe volume protect C:
uwfmgr.exe file commit C:
\temp\test1.txt
uwfmgr.exe help
Considerations
• To prevent data loss in the event of a power failure, the use of a UPS is recommended.
A - 14
.
uwfmgr.EXE
Function
Shows an overview with current
status
Configures basic UWF settings
Enables the unified write filter
Disables the unified write filter
Enables the unified write filter for
the C: drive
Issues a commit for a new file with
the name C:\temp\test1.txt
Displays a helpscreen that explains
all commands and options available
NY-series Industrial Box PC User's Manual (W553)
Remarks
Use this command to check the
status after another command is
executed
- - -
This change is not effective until the
system is restarted
This change is not effective until the
system is restarted
- - -
Committing the overlay can affect
the speed of the boot process
A complete reference can also be
found at the Microsoft Developer
Network (MSDN)