Full
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Copies a complete file system
or directory
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All data is in one place
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Requires large numbers of backup tapes that take a long time to write.
Takes longer to retrieve individual files because the drive has to move sequentially
to the point on the tape where the file is located. You might have to search
multiple tapes.
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Snapshot
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Creates a temporary image of a file system
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System can be in multiuser mode
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System performance might degrade while the snapshot is created.
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Incremental
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Copies only those files in the specified file system that have
changed since a previous backup
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Easier to retrieve small changes in file systems
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Finding which incremental tape contains a file can take time. You might
have to go back to the last full backup.
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