Hello Takahiro when I select EFI_CAPSULE_ON_DISK_EARLY this implies EFI_SETUP_EARLY.
With EFI_SETUP_EARLY I cannot use PREBOOT to add a disk via the host command. So I do not see how the feature could be tested on the sandbox. I think we will have to enable dynamic binding of block devices to overcome this mutual blocking of features. What are your ideas? Best regards Heinrich