Hello, yes HD is 1TB and Debian partition is 300GB (not Mb).
Currently Windows starts directly without reporting other OSes present. So should I use the installation disk in "rescue mode" and reinstall Grub to Debian's / partition (27.94 GiB dev/sda6)? How to install os-prober? I think I have to be able to boot Debian first to be able to install it later. Right? Francesco
