Comment 2 for bug 131084

I agree with Matt's comments, with the proviso that "Erase entire disk" might be confusing unless you mention what's going in its place. Even then it would be confusing if the disk is blank (there's nothing to erase), so that would need a different string.

Most importantly, I think, it's not clear why you're being asked "How do you want to partition the disk?" in the first place. Is there another operating system on one of the disks already? If so, say so! Include its name (e.g. "Windows XP") if the migration code recognizes it, or call it "Another system" and "the other system" otherwise. It's difficult to understand the partitioning slider without naming the things you're allocating space to.

For example:
------------
This computer is currently running Windows XP. Do you want to keep it alongside Ubuntu?

(*) Erase Windows XP, replacing it with Ubuntu

( ) Keep it, so I can choose between them at startup
    [disk choice here if there's more than one disk]
    How much disk space should be reserved for each system?
    [partitioning slider, with both systems named]

( ) Something more complicated
    [advanced partitioning appears here if selected]
------------

The problem with the nested radio button (apart from there being only one of them) is that it is not indented enough. Ideally, its left edge should be exactly aligned with the left edge of the label of the parent radiobutton. Unfortunately this is very difficult in GTK, which I reported as a bug last month. <http://bugzilla.gnome.org/show_bug.cgi?id=454248>