I have a TiVo Series 3 (OLED display model TCD648250B). I have been running it since Jan 2007. It has 2 hard drives (both 750GB Seagate DB35's). The internal hard drive is going bad (recordings would lock up on playback). I connected the drive to my PC and ran Seagates Seatools to confirm that it has bad sectors. That drive in particular was installed before I even powered that TiVo on for the first time in Jan 2007 so I guess it is about due to fail. So I decided to get rid of both drives and just buy a single 2TB Western Digital WD20EURS from DVR_Dude on eBay. (The drive was manufactured in March 2013 so it should have the WDIDLE issue correct?) I didn't transfer any data over so this would be like a brand new TiVo. I got the drive and installed it. Disconnected the E-Sata drive since I didn't need it anymore (and couldn't use it anway since I now have a single 2TB internal drive). The TiVo booted fine no problems. The TiVo software it came with was 9.4 (a really old version from around July 2008 that DVR_Dude says is the most stable for upgrades). I went through guided setup with no problems. Before I was able to download the latest version of the TiVo software (11.0k) I contacted my Cable Company (Time Warner in Columbus, Ohio) and had a long time contact there who was the goto person for Cable Cards activate the cable cards since obviously I changed the hard drive. The strange thing is that neither the CableCard ID or the HOST ID numbers changed on either of the 2 cablecards I have. Shouldn't those numbers have changed since I have a new hard drive? He sent hits to the cards but we couldn't get them to authorize. I decided to put that off until my TiVo had the latest version of the software installed. So I forced connections and after many hours I finally had 11.0k software. We tried to send hits to the cards again with no luck. As a last ditch effort I decided to do a Clear and Delete of everything. However that process kept running even after 4 hours (there weren't any recordings on the drive as it was practically new). Should clear and delete run that long? I decided to pull the power on the TiVo and it rebooted but the TiVo kept staying at the ""Almost there Just a few minutes more" screen. I tried powering it off and on again and it can't get past that screen. So either the drive failed or the TiVo software got corrupted. I ran Kickstart 54 and the SMART test passed but the test /dev/hda failed. I then connected the drive to my PC and the Western Digital Data Lifeguard Diagnostics and initially the SMART status on the drive said FAILED. I then ran a extended test on the drive over night and it passed. In any case I contacted DVR_Dude and they said to send the drive back and they would send me a new one. So for now I put the old drives back and I got the cable cards working again (although I had to replace one of the 2 cards since we couldn't get the one in slot 2 to authorize) and now the TiVo is back to the way it was. I wasted a good day dealing with this. So my fear is that I am going to go through this long process all over again when I get the replacement drive. Does anyone know why the CableCard and Host ID's didn't change with the new hard drive? Is there some sort of steps I should take when I get the new drive?