Sorry to hear that you're having problems with your eSATA drive. I agree with Greg and Husky, your issues have all the earmarks of a bad eSATA cable or enclosure. If it's the enclosure it's likely something to do with the bridge. Since the problem occurs about a half-hour after connecting it, it's probably something heat/chip related which makes me suspect the enclosure more than a cable. A new MX-1 should do the trick. (It comes with a cable anyway.) Here's the Hitachi Feature Tool link. FWIW, to avoid confusion when describing your TiVo, this is commonly called a TiVo HD and this is commonly called a TiVo Series3. Both are labeled as Series3's, but it can be confusing if you say "Series 3 HD." Good luck and let us know how things go.