A migration involves Replication when there are no bit changes to the Packaging Information, the Content Information, and the PDI. Ensuring that none of these bits has changed may be a significant effort, depending on the implementation. The following scenario is an example of Replication:
The Content Information and PDI for an AIP are encapsulated into a standard packaging structure and held in the body of a single file. A Replication migration is easily achieved by simply copying the bit order in the file body to a new file on the same or other media. Changes to the Archival Storage mapping infrastructure may be needed to continue to locate the file, but no change in Packaging, Content Information, or PDI has taken place. Replication, with this type of Packaging Information, affords ease of migration to new media types with maximum automation and little risk of information loss.
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