I'm not a programmer, but there is a tool at the Tivo hacking site
http://www.tivocommunity.com/tivo-vb...threadid=36974 called mfsbackup and mfsrestore, that appears to take semi-propriatery partition and data information and copy it to a compressed file, that could then be burned to an iso image, for later de-compression to another hard drive. From the discussions, it seems to act like dolly, but provides an extra step to compress to a smaller size for interim storage. Reportedly a 15GB hard drive goes down to 150 Mb or so. If someone has the original harddrive, that might be a solution to the need for retention, and restoral of the Snap image.
One group helping another?