Win8 and Ubuntu dual system issues

Win8 and ubuntu dual system problems
Yesterday got the Microsoft win8 key, whim, decided to replace win7!
First enter the win8 iso file under the source folder, run setup, and then customize the installation Go step by step.
After the installation is successful, I have encountered two problems:
1.ubuntu startup items can not be found
Workaround:
Run eazyBCD under win8, add linux startup items, select grub2 drive number Select automatic.
Then restart, enter ubuntu, run the terminal, type sudo update-grub to update the startup items of ubuntu, you will find that the startup item of win8 appears, this is OK.
2. After entering win8, reboot, enter ubuntu, fail to mount the hard disk.
This is caused by the quick start of win8, enter win8 to close the quick start, OK!