Es hat geklappt! Damit die Partitionierung automatisch funktioniert, muss anscheinend auch die Betriebssystemauswahl vorab festgelegt werden <InstallImage>
Danke für die Hilfe!
<?xml version="1.0" encoding="utf-8"?>
<unattend xmlns="urn:schemas-microsoft-com:unattend">
<settings pass="windowsPE">
<component name="Microsoft-Windows-International-Core-WinPE" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<SetupUILanguage>
<UILanguage>de-DE</UILanguage>
</SetupUILanguage>
<InputLocale>de-DE</InputLocale>
<SystemLocale>de-DE</SystemLocale>
<UILanguage>de-DE</UILanguage>
<UserLocale>de-DE</UserLocale>
<UILanguageFallback>de-DE</UILanguageFallback>
</component>
<component name="Microsoft-Windows-Setup" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<WindowsDeploymentServices>
<Login>
<Credentials>
<Domain>WIN-V4ARADF804M</Domain>
<Password>geheim</Password>
<Username>administrator</Username>
</Credentials>
</Login>
<ImageSelection>
<InstallImage>
<Filename>install.wim</Filename>
<ImageGroup>840G4</ImageGroup>
<ImageName>Windows 7 ENTERPRISE</ImageName>
</InstallImage>
<InstallTo>
<DiskID>0</DiskID>
<PartitionID>3</PartitionID>
</InstallTo>
</ImageSelection>
</WindowsDeploymentServices>
<DiskConfiguration>
<WillShowUI>OnError</WillShowUI>
<Disk wcm:action="add">
<DiskID>0</DiskID>
<WillWipeDisk>true</WillWipeDisk>
<CreatePartitions>
<CreatePartition wcm:action="add">
<Order>1</Order>
<Size>100</Size>
<Type>EFI</Type>
</CreatePartition>
<CreatePartition wcm:action="add">
<Order>2</Order>
<Type>MSR</Type>
<Size>128</Size>
</CreatePartition>
<CreatePartition wcm:action="add">
<Order>3</Order>
<Type>Primary</Type>
<Size>102500</Size>
<Extend>false</Extend>
</CreatePartition>
</CreatePartitions>
<ModifyPartitions>
<ModifyPartition wcm:action="add">
<Order>1</Order>
<PartitionID>1</PartitionID>
<Label>System</Label>
<Format>FAT32</Format>
</ModifyPartition>
<ModifyPartition wcm:action="add">
<Order>2</Order>
<PartitionID>2</PartitionID>
</ModifyPartition>
<ModifyPartition wcm:action="add">
<Order>3</Order>
<PartitionID>3</PartitionID>
<Label>Windows</Label>
<Letter>C</Letter>
<Format>NTFS</Format>
</ModifyPartition>
</ModifyPartitions>
</Disk>
</DiskConfiguration>
</component>
</settings>
<cpi:offlineImage cpi:source="wim:e:/install.wim#Windows 7 ENTERPRISE" xmlns:cpi="urn:schemas-microsoft-com:cpi" />
</unattend>
