wasn't the first Zepplin album recorded in one night? on a four track
i can see maybe tracking in one day - but I imagine mixing would be really hard. my ears wear after a while. i hate tracking even one song and then mixing it the same day, let alone a whole album . . .
best I ever did was tracking drums on 10 songs in one day - and the drummer was tighter than a . . . well you get it . . .