Problem: Because there are problems mount, the boot will not start, you need to enter into single user mode to modify fstab to mount file.
1, Linux system boot, press ah e within 3 seconds, then jump to the kernel interface. 
2, e then press enter the following interface, selecting a kernel, and then press the button e. This line is moved to the kernel by arrows. 
3, the third press e, enter here, after the end of adding a content in the above space plus a single 
interface before back after 4, press the enter key 
5, return to this interface can pressing b a. 
6, modify the fstab file to mount, the mount commented, save, and then restart.
hope this helps.