hey guys i have a 250g hdd with W7 on it and a 70gb hardrive with Ubuntu on it dual boot when the pc boots it boots up as the ubuntu boot menu with the option to boot into w7 at the bottom. i use w7 more and need to format the ubuntu drive heres the problems though.

i cant see the 70gb drive in windows at all not even in the disk management area and if and when i do find the 70gb drive to format it im going have trouble with the grub boot loader right as the 7 one is not there... any help would be great