Advantech TPC-300 Series, User Manual

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TPC-300 Series/TPC-B510 User Manual 22
3.1 Windows Embedded Features
The TPC devices support embedded Windows platforms. This chapter outlines the
important features (UWF and HORM) that are provided with the Windows 10 Enter -
prise LTSB operating system.
3.2 Unified Write Filter (UWF)
A Unified Write Filter (UWF) intercepts all write attempts to a protected volume and
redirects those write attempts to a virtual overlay. This improves the reliability and
stability of your device and reduces the wear on write-sensitive media, such as flash
memory media like SSDs.

Important
UWF is unable to protect external removable drives, USB devices, or flash
drives.
The overlay does not mirror the entire volume, but dynamically grows to keep
track of redirected writes. Generally the overlay is stored in system memory,
although a portion of the overlay can be cached on a physical volume.

Note
UWF fully supports the NTFS file system; however, during device startup, NTFS
file system journal files can write to a protected volume before UWF has loaded
and started protecting the volume. Advantech provides a utility to operate UWF.
Refer to the steps below to enable the utility.
1. Click Start Menu -> Advantech -> Embedded Lockdown Manager -> Enable Uni -
fied Write Filter
Figure 3.1 Enabling UWF - Step 1