EwfOptimization (Standard 8 Module Reference)

7/8/2014

Review the applicable Feature modules and any examples for the EwfOptimization setting in Windows Embedded 8 Standard (Standard 8).

This setting specifies how to optimize performance for Enhanced Write Filter (EWF).

The following table shows the possible values.

Value

Description

Optimal performance

EWF copies all disk sectors into the overlay.

Use less overlay space

EWF determines whether the data being written is the same as the data stored on the disk, and copies only changed sectors into the overlay.

Use less overlay space and less writes

EWF determines whether the data being written is the same as the data stored on the disk, and then checks to see whether changes to sectors are already in the overlay. If so, it does not overwrite them.

The following table shows the modules that you can apply this setting to. In Image Configuration Editor (ICE), you can follow the corresponding path to set this setting for a module.

Module

Path

Enhanced Write Filter Management Tool

Features/Lockdown/Compatibility Write Filters/Enhanced Write Filter Management Tool/ProtectedVolumes/Volume/EwfOptimization

Enhanced Write Filter

Features/Lockdown/Compatibility Write Filters/Enhanced Write Filter/ProtectedVolumes/Volume/EwfOptimization

The following XML example shows how to configure EWF to copy only changed sectors into the overlay.

<Volume wcm:action="add">
    <EwfOptimization>Use less overlay space</EwfOptimization>
</Volume>
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