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Having a copy of repository content on disk may enable a preservation workflow, but it is not a preservation strategy by itself.  So transparent persistence is "preservation-enabling", allowing a disk-based preservation workflow to easily access the repository content.

Existing functionality

• fcrepo-message-consumer (deprecated)serialization can be configured to serialize metadata as RDF files on disk using the RdfPersistenceIndexer.
• Using the default configuration, files larger than 4KB are stored on disk named after their SHA1 digest.  So these files are already on disk, and can be matched with their associated metadata records using the SHA1.

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