expanding partition?

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expanding partition?

    I have a samsung 4080 that I wanted to swap the 80GB with a 160GB. I have had problems with running mfsbackup or mfsrestore, so I ran dd and when I put the 160GB in the tivo I had the same recording capacity as the 80GB. How do I get the increase in capacity?

Also do I need to worry about increasing the swap file size? Thanks for the help