Just out of curiousity.... My stock THD has HPA enabled and it boots up normally. The 1.5TB has HPA enabled and has been in the THD for 9 months. My TP drives do not have HPA enabled.... even though the 2 TB was created on a Gigabyte MB and it has been in the TP for 5 months. If you truely want to find out if HPA is enabled on the stock drive. http://www.mfslive.org/download.htm is the iso for MFSlive 1.4. Burn and then boot up with that CD with the stock drive ONLY. Either let it boot or hit option 1 <enter>. Then type 'fdisk -l' That will you if it sees the drive, it should be '/dev/sda' type 'hdparm -N /dev/sda' and it will tell you if HPA is enabled. And that is an uppercase 'N' not a lowercase 'n'. Next try the Kickstart commands and see if that will show a problem and or maybe fix things. http://www.tivocommunity.com/tivo-vb/showpost.php?p=5643823&postcount=2 edit: it can take up to 7 agonizing minutes for the TP to boot up sometimes.