Unified Write Filter (UWF) is a sector-based
write filter that protects your storage media. UWF redirects the
write attempts to a virtual overlay, and intercepts the write
attempts to the protected volume. This improves the stability,
reliability of the device thereby reducing the wear on write media,
such as solid-state drives. In UWF, overlay is a virtual storage
space that saves changes made on the protected volume. If the file
system attempts to modify a protected sector, UWF will copy the
sector from the protected volume to the overlay, and the overlay is
updated. If an application tries to read from
that sector, UWF returns the data from the overlay, so that
the system appears to have written to the volume,
while the volume remains unchanged.For
more information, see the Unified Write Filter documentation at
www.microsoft.com.
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CAUTION:
Failure
to keep the Write Filter turned on (except for regular maintenance
or Application/Driver installs or upgrades) will prematurely wear
out your Flash/SSD storage and invalidate your warranty.