Frame Buffer / Very Long Video Delay

Hi I'm fairly new to max, i'm looking to create a patch that writes individual video frames from a live source onto a drive continuously and create another patch that reads those frame arbitrarily, ie providing the capacity to travel back in time, and adj the delay.
I've done some set-ups with buffer, but they are memory limited. I'd like to achieve an hour or more of "buffer"

I'd love to know if anyone has some pointers in the right directions or experience with similar concept...

mainly, can i achieve a decent playback rate >? I can use SSD drive and a tower.