这种问题一般是由于windows8有一个快速启动功能，导致的，解决办法如下：
打开terminal
1.输入：sudo apt-get install ntfs-3g
安装完成后，对你的挂载盘进行修复。
2.输入：sudo ntfsfix /dev/sda6 （/dev/sda6 是我自己需要修复的，你可以用fdisk -l 查看磁盘信息，找大小对应的那个）
然后会出现：
Mounting volume... The disk contains an unclean file system (0, 0).
Metadata kept in Windows cache, refused to mount.
FAILED
Attempting to correct errors...
Processing $MFT and $MFTMirr...
Reading $MFT... OK
Reading $MFTMirr... OK
Comparing $MFTMirr to $MFT... OK
Processing of $MFT and $MFTMirr completed successfully.
Setting required flags on partition... OK
Going to empty the journal ($LogFile)... OK
Checking the alternate boot sector... OK
NTFS volume version is 3.1.
NTFS partition /dev/sda6 was processed successfully.
就是成功了，恩，没错，就需要这两步。