Moxa DA-710-LX [37/69] File based write filter

DA-710 XPE User’s Manual Software Configuration

File Based Write Filter

File-Based Write Filter (FBWF) allows Windows Embedded Standard 2009 to maintain the

appearance of read and write access to write sensitive or read only storage. FBWF makes read and

write access transparent to applications.

Writing to storage media may be undesirable or impossible in embedded devices. FBWF redirects

all writes targeted for protected volumes to a RAM cache called an overlay. In this context, an

overlay can be likened to a transparency overlay on an overhead projector. Any change made to the

overlay affects the picture as seen in the aggregate, but if the overlay is removed, the underlying

picture remains unchanged.

Follow the steps below to enable FBWF:

1. In the command prompt, type fbwfmgr /displayconfig to check the current FBWF status. The

status defaults to disabled.

C:\>fbwfmgr /displayconfig

File-based write filter configuration for the current session:

Filter state: disabled.

File-based write filter configuration for the next session:

Filter state: disabled.

C:\>

2. Type fbwfmgr /enable to enable FBWF. Reboot the system for the changes to come into

effect.

C:\>fbwfmgr /enable

File-based write filter will be enabled on the next reboot.

C:\>

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