I had two Linux OS installed on my machine: Backtrack 5 Gnome and Backtrack5 KDE. I updated the Gnome version and when I rebooted my Grub2 boot manager displayed a `grub rescue>` command line. 

I then installed Ubuntu on the same partition with the KDE version to recover my boot-loader. I successfully got the Grub working but unfortunately the kernel for the Gnome OS version doesn't show neither the partition when I set the machine up. Ubuntu is great now but I need some files on the ghost partition. 

Please help me retrieve it.