ubuntu 14.04 Serious errors were found while checking the disk device for /

ubuntu 14.04 Serious errors were found while checking the disk device for /.press [I] to ignore, press [S] to skip mounting and press [M] to mount manually. 

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解决方案：

1、进入windows选择启动ubuntu

2、按任意键进入GNU Grub2

3、按E进入编辑模式

把GRUB2 boot entry from "ro" to "rw",

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