A method is disclosed to store information in multiple holographic data
storage media. The method supplies a first holographic data storage
medium, defines an inner storage portion of that first holographic data
storage medium, and defines an outer storage portion of that first
holographic data storage medium. The method further supplies a second
holographic data storage medium, defines an inner storage portion of that
second holographic data storage medium and defines an outer storage
portion of that second holographic data storage medium. The method
provides information, encodes a hologram comprising that information into
the outer storage portion of the first holographic data storage medium,
and encodes the information in the inner storage portion of the second
holographic data storage medium.