Eminor? maybe.

i know there's LOTS of chromatics put into it.

and mainly pull offs
Page isn't much a theory guy - he'll play around with the blues scale and the minor pentatonic scale mostly, but a lot of his playing is out of key, but it sounds good to him (and a lot of us too).
I'm at school so I can't open the link. But is it live at the Fillmore West?
He basically uses a pattern:

And plays it starting on random frets.
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thanks guys.
foob85 i dont think it was at the filmore west. it was a tv performance
but i think it just kind of goes with the e minor scale and he just pulls off on random frets.
thanks for the help!!