Tape Capacity
A primary factor in determining which tape device
you will use is the capacity you need.
Although this looks unimportant
at first sight because you can have as many tapes as you want, it will
become clear that large number of tapes contribute to performance,
manageability and reliability problems. The needed capacity all depends
on one question: will it be possible to change media manually during
the backup operation? If the answer is no, you will need a tape drive
that is capable of backing up the amount of data passed to it in one
backup session on one tape. Keep in mind that the amount of data can
grow.
Current tape media capacity ranges from 4 to 75 GB. If more space is
needed, tape libraries might be a better solution.
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