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Add configurable FFU build partition drive letters

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Add System, Windows, and Recovery partition drive-letter settings to the Hyper-V Settings UI, config save/load, BuildFFUVM parameters, and sample/docs. Defaults remain S, W, and R.

Validate selected letters early, log validation failures for the UI, include drive-letter metadata in VHDX cache matching, and normalize legacy malformed cache values. This only affects FFU build-time partitioning; ApplyFFU deployment letters remain unchanged.
This commit is contained in:
rbalsleyMSFT
2026-06-05 09:46:00 -07:00
parent c32cb93434
commit 9fb9e81701
10 changed files with 262 additions and 21 deletions
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FFUDevelopment/BuildFFUVM_UI.xaml
+90
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@@ -339,6 +339,96 @@
<!-- VM Name Prefix -->
<TextBlock Text="VM Name Prefix" Margin="0,0,0,8" ToolTip="Prefix for the VM Name. The default is _FFU."/>
<TextBox x:Name="txtVMNamePrefix" HorizontalAlignment="Stretch" Margin="0,0,0,20" ToolTip="Prefix for the VM Name. The default is _FFU."/>
<!-- System Partition Drive Letter -->
<TextBlock Text="System Partition Drive Letter" Margin="0,0,0,8" ToolTip="Drive letter used for the System partition while building the FFU VHDX. Default is S."/>
<ComboBox x:Name="cmbSystemPartitionDriveLetter" HorizontalAlignment="Left" Margin="0,0,0,20" ToolTip="Drive letter used for the System partition while building the FFU VHDX. Default is S.">
<ComboBoxItem Content="A"/>
<ComboBoxItem Content="B"/>
<ComboBoxItem Content="C"/>
<ComboBoxItem Content="D"/>
<ComboBoxItem Content="E"/>
<ComboBoxItem Content="F"/>
<ComboBoxItem Content="G"/>
<ComboBoxItem Content="H"/>
<ComboBoxItem Content="I"/>
<ComboBoxItem Content="J"/>
<ComboBoxItem Content="K"/>
<ComboBoxItem Content="L"/>
<ComboBoxItem Content="M"/>
<ComboBoxItem Content="N"/>
<ComboBoxItem Content="O"/>
<ComboBoxItem Content="P"/>
<ComboBoxItem Content="Q"/>
<ComboBoxItem Content="R"/>
<ComboBoxItem Content="S" IsSelected="True"/>
<ComboBoxItem Content="T"/>
<ComboBoxItem Content="U"/>
<ComboBoxItem Content="V"/>
<ComboBoxItem Content="W"/>
<ComboBoxItem Content="X"/>
<ComboBoxItem Content="Y"/>
<ComboBoxItem Content="Z"/>
</ComboBox>
<!-- Windows Partition Drive Letter -->
<TextBlock Text="Windows Partition Drive Letter" Margin="0,0,0,8" ToolTip="Drive letter used for the Windows partition while building the FFU VHDX. Default is W."/>
<ComboBox x:Name="cmbWindowsPartitionDriveLetter" HorizontalAlignment="Left" Margin="0,0,0,20" ToolTip="Drive letter used for the Windows partition while building the FFU VHDX. Default is W.">
<ComboBoxItem Content="A"/>
<ComboBoxItem Content="B"/>
<ComboBoxItem Content="C"/>
<ComboBoxItem Content="D"/>
<ComboBoxItem Content="E"/>
<ComboBoxItem Content="F"/>
<ComboBoxItem Content="G"/>
<ComboBoxItem Content="H"/>
<ComboBoxItem Content="I"/>
<ComboBoxItem Content="J"/>
<ComboBoxItem Content="K"/>
<ComboBoxItem Content="L"/>
<ComboBoxItem Content="M"/>
<ComboBoxItem Content="N"/>
<ComboBoxItem Content="O"/>
<ComboBoxItem Content="P"/>
<ComboBoxItem Content="Q"/>
<ComboBoxItem Content="R"/>
<ComboBoxItem Content="S"/>
<ComboBoxItem Content="T"/>
<ComboBoxItem Content="U"/>
<ComboBoxItem Content="V"/>
<ComboBoxItem Content="W" IsSelected="True"/>
<ComboBoxItem Content="X"/>
<ComboBoxItem Content="Y"/>
<ComboBoxItem Content="Z"/>
</ComboBox>
<!-- Recovery Partition Drive Letter -->
<TextBlock Text="Recovery Partition Drive Letter" Margin="0,0,0,8" ToolTip="Drive letter used for the Recovery partition while building the FFU VHDX. Default is R."/>
<ComboBox x:Name="cmbRecoveryPartitionDriveLetter" HorizontalAlignment="Left" Margin="0,0,0,20" ToolTip="Drive letter used for the Recovery partition while building the FFU VHDX. Default is R.">
<ComboBoxItem Content="A"/>
<ComboBoxItem Content="B"/>
<ComboBoxItem Content="C"/>
<ComboBoxItem Content="D"/>
<ComboBoxItem Content="E"/>
<ComboBoxItem Content="F"/>
<ComboBoxItem Content="G"/>
<ComboBoxItem Content="H"/>
<ComboBoxItem Content="I"/>
<ComboBoxItem Content="J"/>
<ComboBoxItem Content="K"/>
<ComboBoxItem Content="L"/>
<ComboBoxItem Content="M"/>
<ComboBoxItem Content="N"/>
<ComboBoxItem Content="O"/>
<ComboBoxItem Content="P"/>
<ComboBoxItem Content="Q"/>
<ComboBoxItem Content="R" IsSelected="True"/>
<ComboBoxItem Content="S"/>
<ComboBoxItem Content="T"/>
<ComboBoxItem Content="U"/>
<ComboBoxItem Content="V"/>
<ComboBoxItem Content="W"/>
<ComboBoxItem Content="X"/>
<ComboBoxItem Content="Y"/>
<ComboBoxItem Content="Z"/>
</ComboBox>
<!-- Logical Sector Size -->
<TextBlock Text="Logical Sector Size" Margin="0,0,0,8" ToolTip="Unit32 value of 512 or 4096. Useful for 4Kn drives or devices shipping with UFS drives. Default is 512."/>
<ComboBox x:Name="cmbLogicalSectorSize" HorizontalAlignment="Left" ToolTip="Unit32 value of 512 or 4096. Useful for 4Kn drives or devices shipping with UFS drives. Default is 512.">