Interleaved Recording of Formatting Marks in Three-Dimensional Optical Information Carriers: Reducing Formatting Time for Multilayer Storage Media
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Alexey Viktorovich Morozov
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Formatting time scales with the number of independently addressed layers in a volumetric optical carrier, a relationship that recent gains in per-layer data density have made increasingly costly. This paper examines the interleaved formatting method disclosed by Polshchikov I., in which servo marks are recorded along radial and axial paths matched to a three-dimensional lattice, replacing the spiral track later used for reading. For a representative carrier with 37,000 spiral tracks, the disclosed method reduces recording-head travel distance from approximately 9415 m to approximately 22 m per formatted layer and reduces the required number of head rotations by a factor of roughly 66. Combined radial-axial interleaving raises recording rate by at least a factor of twelve over spiral-following formatting. The analysis identifies group-to-group transition distance, specified in the disclosure at 30 to 70 microns, as the parameter most likely to constrain further throughput gains, and proposes testing whether synchronous-movement recording strategies documented in holographic storage transfer to axial refocusing in discrete-layer carriers.
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Authors
Alexey Viktorovich Morozov
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References:
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