What size is the HD in he 622? I just hooked up a 360Gig EHD on my 211 and it only shows 33 hours of HD space. Seems kind of low, close to what the 622 shows.
OTA (MPEG-2) HD may take more space than Dish guesses. Standard MPEG-4 HD may take half of the quoted. Check the number of MB in (VIP722 etc.) DVR+4(My Media)+2(Send to Device) and "round up" by a few MB. I use 700-900 MB/hr for MPEG-2 SD, 1800-2500 MB/hr for MPEG-4 HD, 4000-6000 MB/hr OTA MPEG-2 HD. It will also tell you the number of GB available on the external but not the internal.
-Ken
if your are recording mpeg4 programs you will get way more time then stated.