Hello people! I am running into bit of problem here.

I have a 2011 Mactel in which I installed a 2nd HDD using a optibay. That I initially installed Windows 7 using boot camp. I decided to install Ubuntu on then 2nd HDD via USB and I was successful. Initially after installation GRUB 2 would run fine and I can boot Ubuntu. I would hear the MAC boot up sound and it ubuntu GRUB2 would run. However, recently that is not running automatically and I cannot access the partition. The MAC disk utility reads the partition but says it can't be mounted (so I can't boot from MAC bios from pressing "option" key) and when I press F2 (boot option for windows) to access the the ubuntu partition, but it doesn't read the partition. Help?