One Acct, 2 machines?

[kmkings311]

Question. And, I think I'll get the answer that I'm thinking. Can you have to machines running one TiVo Acct? Say, I create a new HD using my old TiVo machine and put the orig HD in the new machine. Or, does the TiVo machine have unique IDs for whening logging on to the TiVo service that is NOT on the HD? Thnx!

[maharg18]

The service is tied to the TSN, which is located in a chip on the motherboard, so switching hard drives will do nothing.