Pre-installation Diskpart Tasks with SDA

To manage the complexity of Legacy and UEFI BIOS, here is my script Download that detects the BIOS type and creates the correct partitions.

Two possible executables:

• Disk_x64.exe for 64-bit ISOs
• Disk_x86.exe for 32-bit ISOs

These are simple AutoIt executables (source available) that detect the BIOS type. The command wpeutil UpdateBootInfo generates the registry key HKLM\System\CurrentControlSet\Control, which provides the BIOS type information.

The diskpart files will be executed based on the type of PC:

• BIOS.txt
• UEFI.txt

You can modify the text files to create partitions according to your needs.

BIOS Legacy (single C partition)

select disk 0
clean
create partition primary
select partition 1
active
assign
exit

Copy

BIOS UEFI (single C partition)

select disk 0
clean
convert gpt
create partition efi size=100
format quick fs=fat32 label="System"
assign letter="S"
create partition msr size=128
create partition primary
format quick fs=ntfs label="Windows"
assign letter="C"

Copy

• Adjust the two diskpart files before creating the zip, then create the pre-install task.