Hitachi HF-W100E Instruction Manual page 109

(2) File-Based Write Filter (FBWF)
FBWF suppresses writing to the storage and redirects the write to the RAM overlay cache.
This is the feature of managing and protecting the corresponding partition of storage in file
units.
Reading
Storage
By the above, writing is discarded by shutting down or restarting the equipment, so it is
possible to restore to the state before FBWF is enabled. The performance of memory usage is
improved compared with EWF, and it is possible to set "exclusion list" to reflect change of
specified file even when FBWF is valid.
< NOTE >
・ When using FBWF with this equipment, it is necessary to start the target
service. Please do the following.
1. Double-click the EnableFbwf.reg file (DisableFbwf.reg to stop the service)
under "C:\HITACHI\Settings\Filter".
2. The following message will be displayed. Click Yes.
3. A message indicating that it was successfully added is displayed, so click
OK and restart the equipment.
Writing
write filter (FBWF)
File System (FAT/NTFS)
Memory
4. PRECAUTIONS REGARDING THE OS
The basic operation is the same
as EWF, but the write filter exists
on the file system.
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