When files are deleted, UWF removes them from the overlay and returns the freed resources to the available pool.Īs the drive overlay fills up the available space, you can warn your users that they're running out of space, and prompt them to reboot the device or to run a script to clear the overlay.(Some apps have high write volumes and will fill up the overlay faster.) The amount of overlay used will depend on: $files.OverlayFiles | select-object -Property FileName,FileSize | export-csv -Path D:\output.csv $files = $wmiobject.GetOverlayFiles("c:") You can use this Powershell script to find out which files are consuming space: $wmiobject = get-wmiobject -Namespace "root\standardcimv2\embedded" -Class UWF_Overlay We recommend enabling UWF on a test device, installing the necessary apps, and putting the device through usage simulations. For example, if the OS requires 2 GB of RAM, and your device has 4 GB of RAM, set the maximum size of the overlay to 2048MB (2 GB) or less. When planning device rollouts, we recommend optimizing the overlay size to fit your needs.įor RAM overlays, you'll need to budget some RAM for the system.
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