Like any database application (this one is under Linux) if the index file gets scrambled, the database is unuseable. I would pose the solution of deleting the data from the database ( programs recorded, wishlists, season passes etc. ) but not the database file ( as in wipe everything ). Then do the call and try to import the data into the empty structure. That is what iI will try with my 80-hr type 2 unit as soon as my wife copies her stuff out to the other Tivo.