i got problem about my PC, my pc use dual OS, but after I install windows the grub cannot detect my BAcktrack,my Backtrack location in /dev/sdaa4, I try to repair but error :
sudo su
mkdir /media/bt
mount /dev/sda4 /media/bt
error you must specify the filesystem type next i try another command
mount -t ext4 /dev/sda4 /media/bt
error again
wrong fs type, bad option, bad superblock on /dev/sda4, missing codepage or helper program or other error
So what can i do for repair my grub?