I did not have the same luck as some of you others.
I called Dish and asked about how I could get the hard disk that was originally connected to my three year old 622 to work with my new 722k. I told them I was under the impression that this was possible, since that is what the CSR told me when I signed up for the uprade.
After almost 30 minutes on the telephone, and ending up with a supervisor, I was told that the programs on that hard disk were not going to be saved, because the original hard disk was formatted with an older version of the software on the 622 that is not compatible with the 722k. They told me that the only way I would be able to make this work would be to copy it all back to the 622, connect the EHD to the 722k, reformat the disk, reconnect it to the 622 and then copy the programming back to the EHD. The 722k would then have no problem reading the drive.
Sounds good, except the the installer took the 622 with him after installing the 722k and it was already in transit to Dish. So I am out of luck.
The are going to credit me one month of service to make up for the bad information I was given by their CSR.
I suggest to anyone doing an upgrade, that you connect and test the EHD before the tech leaves your house, just in case you have to go through this ridiculous procedure!
I formatted the drive, and it works with the 722k. I just lost a lot or programming, that I should not have lost...............