Uwf (Unified Write Filter) - NEC Express5800 Series User Manual

Chapter 2 Before Getting Started
1.

UWF (Unified Write Filter)

Before getting started on client configuration through the Atrust Client Setup console or through the Windows 10 IoT
operating system, note that in a session any changes to the system will not be kept by default after the system restart.
This is due to a special feature called UWF (Unified Write Filter) in your Windows 10 IoT system.
By default, your US320f is UWF-enabled. Unified Write Filter (UWF) is a sector-based write filter intercepting all write
attempts to a protected volume and redirecting those write attempts to a virtual overlay. With UWF, all system changes
will only affect the session where the changes are made. After restart, all changes will be discarded.
You can change the default via the Atrust Client Setup console. See Chapter 4, "2.9 Configuring UWF (Unified Write Filter)"
for more information.
Important Read Chapter 5, "3. Using the Unified Write Filter (UWF)" first before making any changes to your
system.
 As a thin client device, your US320f is mainly for access to remote or virtual desktops on
Note
servers. With the limited and protected (UWF-enabled) hard disk drive space, it is not
recommended to save data on your US320f. Instead, you can use storage spaces over remote /
virtual desktops, removable storage devices, or networks.
 In case that you need to copy a file to the protected volume, ensure that its size is smaller than
the free memory (overlay) space. Otherwise, your system may have unexpected results or
become unresponsive.
Express5800/US320f User's Guide
1. UWF (Unified Write Filter)
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