I bought a Tablo which I used for a couple of weeks before the Tablo stopped working properly and needed to get replaced. Amazon sent me a replacement, but unfortunately just swapping out the Tablo unit wasn’t enough as it won’t use the hard drive written by the other Tablo unit. I don’t understand why this limitation exists? The fact that the hard drive is external and you should be able to easily move it from one Tablo to another should be a great selling point. I always hated that about the Dish Network DVR, that if the DVR developed a problem you would lose all your recordings (which happened to me a few times). Since the hard drive is external, it seems that shouldn’t be the case with Tablo, but it is. Anyone know why this is?