TiVo Community Forum Archive 1 (http://archive.tivocommunity.com/tivo-vb/index.php)
- TiVo Upgrade Center (http://archive.tivocommunity.com/tivo-vb/forumdisplay.php?forumid=25)
-- Swapping drives across brands and generations (http://archive.tivocommunity.com/tivo-vb/showthread.php?threadid=180668)

I suppose for completeness I should mention a few other things.

First, Series 1 and Series 2 boxes are incompatible at the software level - they use different CPU types and programs compiled for one won't run on the other.

Second, moving a disk to a different model TiVo (first three digits of service number different), even if the CPUs are compatible, will result in what we affectionately call "the moron zone". The box will think it has the wrong software and will repeatedly call TiVo to download the right software, except that it will get it wrong every time. Eventually, TiVo will notice and will shut off your account.

Third, moving disks between DTiVos of the same model in general won't work - the shows are encrypted using a key based on the motherboard serial number. You will get "Error 51". This can be resolved by a "Clear and Delete Everything", which will delete all your shows. I have read that there are ways around this, but I have no personal experience with it.

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Steve

One thousand three hundred thirty-three, zero