Le 06/10/2016 à 20:12, Felix Miata a écrit :
No Linux distro needs more than a tiny fraction of a 750G HD.
Wise people would never use all 750 GB for a single OS if it does not need to contain as many data.
Once booted into Jessie you can shrink the openSUSE installation to a more reasonable size, leaving yourself room for at least a dozen other distros in multiboot on your 750G.
Actually if the OP followed the openSUSE installer defaults, the root filesystem is btrfs and can be shrinked while mounted.
If all you get is a login prompt, login as root and run os-prober.
os-prober just detects other OS'es, it does not change anything. You need to run update-grub (or update-grub2 as openSUSE may name it) to add boot menu entries for the discovered OS'es.