There's been some discussion in alt.dbs.directv usenet discussions about using an external HD and it working with other D* HDDVRs. I had always thought that was not possible as the video was locked into the HDDVR it was created on. But here's a quote of the last posting in the discussion that seems to say that isn't the case:
>>>> Use and external drive and you don' lose anything.
>>> Actually, that depends on what goes wrong. If (for example) the
>>> external drive fails, you lose everything on it. Also if something
>>> else internal to the DVR fails, you also lose everything on the
>>> external drive if the DVR must be replaced (the new DVR will simply
>>> reformat the external drive as soon as you connect it, wiping out
>>> everything recorded on it).
>>Well I beg to differ with you. I can take any of my four external drives
>>and switch them between any HDDVR. All four are different models also.
>My experience with HR20 and HR21 DVRs was different the last time I
>tried... but that was a few years ago. I have a 'clone" of each of my
>DVR's hard drives, so tomorrow I'll run a few tests to see if you are
OK, I tried a clone of one of my DVRs connected to a different DVR,
and to my surprise, it worked exactly as you said, so I retract my