Good grief, $225-ish for the special formatting? Ouch! It’s odd that the TiVo is ok with a TB 2.7TB drive but not a 3.6TB drive. I thought most of the controller and formatting issues were at the 2TB barrier. I wonder what would happen if you got bit for bit copy of their 3.6TB drive and applied it to another drive. I’m sure that is what they are doing anyway. So get something like a WD 2.7TB Red NAS Hard Drive with a 3 year warranty and 24/7 support for $135 delivered or pay $350 (free shipping, gee thanks) for a 3.6TB drive? Hmm… Also, the old boot CD that copied the original TiVo drive to a new bigger one no longer works?