The thing is that by now I can't see all my former partitions; I only see the first two ones. The first has 500Mb and the other 3.5MB. The big one (of course) is the one I can't see.
I don't think Magellan should have anything to do with that. If it works under Workbench, it should work under Magellan too. Does it show up if you boot into Workbench instead on Magellan (hold shift pressed during the boot)? Or does it show up in the Magellan's Format window (User menu->Format)? Or with Info command on shell? And it isn't defined as hidden from Settings->Environment->Desktop?
Well, that's normal. The thing is (well, I don't understand Magellan and perhaps it's a simple thing) if I use the Workbench Install disk and try to use HdTools, HDToolBox opens as a player, starting Soundtracker 15...
Sounds like something mixed in filetype recognition... you haven't installed any external modules to magellan? Anyway, I'd go look for filetypes (Settings->File types)...
If I try with HDInstTools, Opus requests "Enter arguments for HDInstTools". What arguments must I give him... Play it again Sam?
If you double click file when lister is in name mode, it tries to run it as an amigados command and you can enter normal shell arguments for it. Double click it with shift key pressed or switch view to icon mode to launch it as a wb application.
I have no idea how to do it, but the thing is: Can Magellan come to see all the partitions or do I need something else with a big HD?
There shouldn't be any problems for Magellan to see all the partitions. Magellan doesn't handle those things itself at all. If they work in the system, they work in the Magellan.
