nike5580 said:
At this time no receiver can pause or rewind live tv. That is a feature that only DVR's can do. When the C30/C31 (which ever it is called now) is released, you will be able to pause an rewind live tv at tv's that are connected to them. The C30/C31 are RVU clients and will work with you HR34. However they would use one tuner from the HR34 while they are in use.
Pausing live TV and playing it back delayed is actually one of the most logistically-difficult things that the HDD is asked to do.
When a recording is written to the user partition, it is usually written to contiguous space, so the actuator doesn't have to move much. Same thing with playback. When two programs are recorded at the same time, the actuator has to jump back and forth between the two locations where the programs are written (which are usually fairly close together if possible). If you watch a third recording at the same time, it has to juggle all of that mentioned before plus read from another area, so the actuator is a little busy jumping around.
Live TV delayed and played back is both a read and write situation, so the actuator is moving between read and write a lot, just for that task alone. Combine that with other tasks (a recording in the background, indexing of database content) and its even busier. But if the amount that the signal is delayed is just so, the actuator will have to move a lot, because the physical space where the recording happens and the playback happens may be far apart, or may be very close together. So there are some worst-case situations for handling delayed playback of live TV, at least as far as how far the actuator has to travel, that can and will happen statistically often.
Add to that that the partition where live TV happens is usually comparatively far away physically from where the recordings on the user partition are, and there is a lot of ground to cover for the actuator, more typically than even dual record with single playback. This is one of the reasons that DoublePlay must be invoked and times out after a while (otherwise it could prevent background indexing tasks from finishing fast enough to keep from getting snowed under by new indexing tasks).
So I guess it is not too surprising that it is difficult to push DVR trick play features to client receivers. Faster DVRs, maybe faster HDDs with larger caches, possibly even a "flash cache" built into client receivers, may improve this as time goes by.