I swapped out a 1gb drive from Roamio Plus with a 3tb drive I had previously in a Roamio basic. Thought it went ok until I realized none of the recordings I had set were recording. By chance I went into the sys info screen and found that the TSN was missing?? When I did the swap it all worked until the last boot (box had to download a software update) but when it came up it told me there was hardware problem and I would need to reboot the Tivo. Do so and until now I thought I was ok until I found it wasn't recording anything. I'm doing a clear an reset and see if that helps. Has anyone else seen this before?