The disk contains an unclean file system (0, 0).
Metadata kept in Windows cache, refused to mount.
Falling back to read-only mount because the NTFS partition is in an
unsafe state. Please resume and shutdown Windows fully (no hibernation
or fast restarting.)
大概的意思就是说，挂载这个盘的时候，文件被win系统占用。
第一步卸载
sudo umount /mydisk第二步修复
sudo ntfsfix /dev/sdb2第三步重新挂载
sudo mount /dev/sdb2 /mydisk