Drive Upgrade in Roamio, impact to Mini?

I have a Roamio OTA w/the standard 500GB (75h) drive. Connected to that is a TiVo MINI that periodically allocates a tuner from the Roamio. I want to upgrade the Roamio's drive to a 2TB drive.

1. What do I need to do to make sure that the Mini continues to function on the upgraded TiVo? I'm assuming that I just need to make sure it finds it's activation at tivo.com and then it will allow the MINI to connect. Is assumption correct?
2. I'm NOT worried about retaining any of the recordings from the Roamio's current drive. So from other threads it sounds like all I have to do is pop out the existing drive and pop in the new one.
3. Are there performance characteristics that I need to be worried about for the new drive? This is what I bought.

TIA