Dell Wyse Windows 10 IoT Enterprise for Latitude 5280 Mobile Thin Client Administrator’s Guide

To view and manage UWF control settings, use the Unified Write Filter Control dialog box. To open the dialog box, double-click the UWF icon in the notification area of the administrator taskbar.

To configure the UWF control settings, use the following guidelines:

• UWF Status area includes:

  • Current Status — Shows the status of the Unified Write Filter. The status may either be Enabled or Disabled.

  • Boot Command — Shows the status of the Boot Command. UWF_ENABLE means that the UWF is enabled for the next session; and UWF_DISABLE means that the UWF is disabled for the next session.

  • RAM used by UWF — Shows the amount of RAM allocated to the Unified Write Filter in Mega bytes (MB) and Percentage. If Current Status is Disabled, RAM allocated to UWF is always zero (0).

  • Amount of RAM used for UWF Cache — Shows the amount of RAM allocated to Unified Write Filter cache for the current session in Megabytes (MB).

  • Warning #1 (%) — Shows the UWF cache percentage value at which a Low Memory warning message is displayed to the user for the current session.

  • Warning #2 (%) — Shows the UWF cache percentage value at which a Critical Memory warning message is displayed to the user.

• UWF Cache Settings area includes:

  • Amount of RAM to be used for UWF Cache — Shows the amount of RAM that is to be used as Unified Write Filter cache for the next session in MB. This value should be in the range of 256 MB to 2048 MB. There is an extra check to ensure that this value does not exceed 50% of Total Available RAM.

• UWF Warning Settings area includes:

  • Warning #1 (%) — Shows the UWF cache percentage value at which a Low Memory warning message is displayed to the user (Default value = 80, Minimum value = 50, Maximum value = 80).

  • Warning #2 (%) — Shows the UWF cache percentage value at which a Critical Memory warning message is displayed to the user. Once the memory level crosses the warning level 2, system automatically restarts. (Default value = 90, Minimum value = 55, Maximum value = 90).

• Enable UWF — Allows you to enable the Unified Write Filter and prompts you to restart the thin client device. Restart the thin client device, to save the changes. After the system restarts to enable the Unified Write Filter, the Unified Write Filter status icon in the desktop notification area turns green.

• Disable UWF — Allows you to disable the Unified Write Filter and prompt you to restart the thin client device. Restart the thin client device, to save the changes. After disabling the Unified Write Filter, the Unified Write Filter status icon in the desktop notification area turns red and the Unified Write Filter remains disabled after the system restarts.

• Defaults — Allows you to reset the UWF Cache Settings area, and the UWF Warning Settings area to their default values.

• File Commit area includes:

  • File Path — Allows you to add, remove and commit files to the underlying media. The system will not restart the thin client device. The changes are committed immediately.

    • TIP: Delete a file path from the list, if the file is not committed.

• Current Session Exclusion List area includes:

  • File/Directory Path —

    Allows you to add and remove a file or directory, to or from the exclusion list for the next session. This retrieves the list of files or directories that are written through in the current session and the title of the pane is shown as Current Session Exclusion List. The Next Session retrieves the list of files or directories that are written through for the next session and the title of the pane is shown as Next Session Exclusion List. The system will not restart the thin client and the changes are not committed until an administrator restarts the thin client device manually.