Superfluous MBR signature check while creating a new emuMMC.

NxNandManager/NxNandManager/NxStorage.cpp

Lines 2011 to 2012 in 270ccdb

    
           if (hexStr(mbr.signature, 2) != "55AA") 
        
               return ERR_OUTPUT_NOT_MMC;

This prevents the creation of a new emuMMC on storage media with no MBR at all, like VBR-formatted media (e.g. volume starts directly at LBA 0) or zeroed-out media (e.g. using dd, HDD LLF Tool or similar tools).

I've had to manually format SD cards using a MBR-based layout before attempting to create a new emuMMC on them because, otherwise, the process fails. In my experience, as long as you properly create and write the modified MBR (including its signature) after writing the eMMC dump, there should be no need to check for the MBR signature beforehand.

	if (hexStr(mbr.signature, 2) != "55AA")
	return ERR_OUTPUT_NOT_MMC;