我有一个健康的文件系统，但我无法在其上运行tune2fs：
# tune2fs -l /dev/sda1 tune2fs 1.42.9 (28-Dec-2013) tune2fs: Bad magic number in super-block while trying to open /dev/sda1 Couldn't find valid filesystem superblock.
filesystems ext4
ext4 ×1
filesystems ×1