Quote:
Originally Posted by Ghitulescu
Not only, but:
the multiple-backup systems have to be technologically different (magnetic media is sensible to magnetic fields, optical media is sensible to scratches and UV, paper is sensible to fire and water etc.)
these have to be stored individually in different locations.
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Excellent point. The most robust media is flash memory, which can survive being driven over with a car, dropped in coffee or
nailed to a tree, but the biggest danger to backups is always user error. The more different copies you have, the harder it is to screw all of them up.