Failed Unmount /isodevice

Today I’ve decided to upgrade my mint 13 to 14 with the codename Nadia. I did it with a fresh install. When I was about to perform the installation, it turned out there was an error saying that /isodevice could not be unmounted.

The steps are quite easy

• Press the combinationCTRL + ALT + F1

• type sudo umount -l /isodevice.

• Then return to the Installation menu and continue the install process by pressing CTRL + ALT + F7 or F8

GOOD LUCK