pm_ResSectors
fatVolume->pm_ResSectors, fatVolume->pm_FATs, fatVolume->pm_FATsecs);
fatVolume->pm_fatblk = fatVolume->pm_ResSectors * fatVolume->pm_BlkPerSec;
uint64 minTotalSectors = fatVolume->pm_ResSectors +
dummyVolume.pm_fatblk = dummyVolume.pm_ResSectors * dummyVolume.pm_BlkPerSec;
volume->pm_ResSectors = getushort(bpb->bpbResSectors);
uint32 resSectors = volume->pm_ResSectors;