Advertisements Could someone explain to me how the channel buffer and tuner selection work on Tivo Roamio? For some reason I'm just realizing this issue now, but say for instance I'm watching Channel A and a commercial comes on. I go to the guide and tune to channel B. After 10 minutes channel B has a commercial and I change back to channel A. I want to rewind channel A because I've missed part of the show, but there is no channel buffer!! I have 6 tuners, shouldn't they all be buffering for at least 30 minutes on the most recently watched channels? I've tried searching about this, but all I find is "hit the record button." Well, sometimes I don't realize I want to return to that channel if I'm just channel surfing. Not only that, but why should I have to hit record? Why don't the most recent tuned channels stay buffering for 30 minutes? Along these same lines, how/why does Roamio choose to keep certain channels on each tuner? I would think it would keep the most recently watched 6 channels on the tuners and buffer each for 30 minutes. I'm hoping there may be an easy fix to this because it's becoming very frustrating. Is there a secret menu or programming that I can do to change this?