当你发现你的某个分区不能访问，而其他分区却正常能访问，不妨，尝试一下os自己带的一个命令，说不定会给你带来意外惊喜-When you find that you can not access a partition, while the other partition is normal to visit, may wish to try a os command to bring their own, maybe will give you a pleasant surprise