CORE-13525 This is done so that the caller doesn't need to know details about particular architecture specifics, like VBR, MBR etc. Extra checks and specific handling is also performed for supporting bootloader installation on removable media: - verify whether the media is a floppy or some other removable media, - depending on which, a suitable file system is chosen, - and if the media is not a floppy, do the supplemental partition verifications to determine whether the media is a "super-floppy" (in the partitioning sense).