Yep, went through that at the museum because some
people were advocating
putting media on the archive shelves - but it's not an idea I'm a fan off; the
stuff's just too prone to damage and decay.
Unless you recover the data, what you have is a physical artifact of a magnetic
storage medium. There is absolutely no way to say what, in fact, is even on it
until you read it. Bits aren't preserved if they exist on only one physical medium,
which you may not be able to recover in the future.