I just tried again and noticed that during the process there was a not running grub install /dev/sda. Since sda is the pen drive (mounted as /cdrom) then this is writing grub to the pen drive and not the internal hdd.
I just tried again and noticed that during the process there was a not running grub install /dev/sda. Since sda is the pen drive (mounted as /cdrom) then this is writing grub to the pen drive and not the internal hdd.