You may want to read this:
LTO is interesting but it looks like you cannot use it in a standard AS6.1B installation.
Now I mention it I have a vague feeling of deja-vu and the fact that Georg Johann-Lay (SprinterSB) may have already pointed this out?
EDIT: Ah yes I didn't dream it:
So I assume you are already aware of this? It does mean you'll need that PR fix before 6.1 final ships out.