I have 2 of the 622 HD DVR's and have had a Fantom 500GB Hard Disk working for quite a while on one of the 622's. Last night I saw a 640GB Western Digital Hard Disk on sale at Best Buys for $99 so picked this up for the other 622 DVR. Attached the new 640GB Hard Disk to the second 622 DVR and went thru setup fine and is working smoothly. But now I go back to my other 622 DVR and it comes up with an error screen saying it doesn't recognize any USB Hard Disk drive. This is the 500GB Fantom drive that has been working fine until now. I unplugged the power to it and then unplugged both ends of the USB cable- still the 622 doesn't recognize this Hard Disk anymore. So when a 2nd Hard Disk is put on another 622 DVR then do I need to get DISH to do something on their end to allow 2 different Hard Disk to work even though they are on 2 different 622 DVR's?