losetupとkpartxを使う方法が計算なしで済むのだけど、ここは計算ありの単純な方法で。 まずはレイアウトの確認。 $ sudo fdisk -ul eMMCwriterSD.img You must set cylinders. You can do this from the extra functions menu. Disk eMMCwriterSD.img.sec: 0 MB, 0 bytes 62 heads, 62 sectors/track, 0 cylinders, total 0 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512