Any of your HD-capable receivers (HD-DVRs and HD receivers) can view programming from either HD-DVR. However, each HD-DVR can only serve one stream at a time (plus the primary output to the TV connected to it), so, for example, only 2 of your H24s could be watching recorded shows from the HR24s at any given time, while you simultaneously watch recorded shows on the HR24's themselves, plus you could be recording two more shows on each HD-DVR.
Sorry to hijack the thread, but I have an installation scheduled for Friday that I was thinking of cancelling based on some misinformation spread by my CSR. I was told the same thing, MVR could only handle one DVR. If I added a second it would be "tethered" to only one of my HD receivers (HD DVR 1 tied to TV3, and HD DVR tied to TV 4. TV 4 cannot see HD DVR 1, etc.). Sounds like this is not the case I can add a second DVR accessible by all non-DVR receivers.
I'm still confused regarding how many shows I can record at once and how many I can watch at once. If I stick with my current setup (1 HD DVR and 3 HD receivers) are you saying I can only watch one recorded program at a time on only one of the non-DVR receivers plus one program on the TV connected to the HD DVR?
How many streams can I record at once? Can all four TVs record a program at the same time (like U-Verse advertises)?
Also, my CSR said I could pause live TV on my non-DVR receivers. Is this true? Reading through your forums it seems like this is not the case. Only TVs connected to a HD DVR have this capability.
So if I add a second HD DVR, each TV can watch a recorded show at the same time, correct (each HD DVR sending out 2 recordings, one local, one to a non-DVR)? Hopefully that all makes sense. TIA!