select disc X
? (how do I create mbr disk or it is already there?)
create partition primary
An empty disk is initialized when creating first partition.
If it is a primary or extended partition -> MBR
If you create a basic, system, MS reserved partition -> GPT
I am not 100% sure but on a GPT disk the first partition should be the "system" partition.
The clean command (without "all" option) is clearing all partition info so the disk should be decoded as uninitialized (data in areas outside partition tables is still on disk and can be viewed if you scan sector by sector)