My TIVO Roamio Pro is 6 years old - working fine, but I decided to replace the hard drive on my terms. I followed the same procedure in this thread. Same positive result. TIVO with new disk worked fine - cable card stayed paired up. Copying took 7.5 hours. I didn't upgrade the disk size as 3TB is plenty. Used a T9 and T10 Torx to open the case and remove the hard drive.