How to see other partitions using the Terminal Emulator and mount them?

I just installed Android on my netbook and it caused it to not see Linux Mint on my machine and I'm assuming it removed it from the GRUB.

Now the first problem is how do I see the contents of my Linux Mint partition and explore them in Android? Can I use a Terminal or Mount manager?

I dont see anything called /dev/sda as expected. How do I mount the Mint and the Windows partition within Android? What commands would be helpful? What are the names of the hdd device file?

If possible please let me know how to edit the GRUB also! I think I can see them in /dev/block/sda5 - What exact command to mount it? I have superuser access.