Patent ID: 7752388

Claim:
A method to store information in multiple holographic data storage media, comprising the steps of: providing a first holographic data storage medium; defining an inner storage portion of said first holographic data storage medium and an outer storage portion of said first holographic data storage medium; providing a second holographic data storage medium; defining an inner storage portion of said second holographic data storage medium and an outer storage portion of said second holographic data storage medium; providing information; encoding a first hologram comprising said information into said outer storage portion of said first holographic data storage medium; and encoding a second hologram comprising said information into said inner storage portion of said second holographic data storage medium; wherein: said first holographic data storage medium comprises a first outer radius R 10 and a first inner radius R 11 , said defining an inner storage portion of said first holographic data storage medium step comprises the step of calculating a first RAID-Mirror radius R 1RRM equal to [(R 10 2 -R 11 2 )/2] 1/2 ; said first RAID-Mirror radius separates said first inner storage portion and said first outer storage portion.