A multi-level encoded and interleaved data format for holographic data storage with high reliability and high recoverability

Siyi Wang; Qiang Cao; Changsheng Xie

doi:10.1117/12.2687534

6 November 2023 A multi-level encoded and interleaved data format for holographic data storage with high reliability and high recoverability

Siyi Wang, Qiang Cao, Changsheng Xie

Author Affiliations +

Proceedings Volume 12921, Third International Computing Imaging Conference (CITA 2023); 129210C (2023) https://doi.org/10.1117/12.2687534
Event: Third International Computing Imaging Conference (CITA 2023), 2023, Sydney, Australia

Abstract

Holographic Data Storage (HDS) with Bragg selectivity records multiple overlapped holographic images in the same physical location, thus increasing the storage capacity significantly. Unfortunately, it also brings a high raw bit error rate and faces burst data errors. To solve these problems, we propose a multi-level encoded and interleaved data format for HDS. A set of data DSUs (minimum continuous data units) generate parity DSUs according to the code rule (CodeRule 1). At the first level DSU encoded and interleaved mode, a set of DSUs interleave and disperse within a sector corresponding to a holographic image. At the second-level, sector encoded and interleaved mode, a set of data sectors generate parity sectors according to the coded rule (CodeRule 2). Both such data and parity sectors are organized into a sector-array, and a fixed number of sector-arrays form a sector-cluster. Consecutive sectors are interleaved within a sector-array. In the third-level page encoded and interleaved mode, a page is divided into a set of sectors, aligning with sector-array. A set of data pages generate parity pages according to the coded rule (CodeRule 3). A fixed number of pages are combined into a page-array, and a fixed number of page-arrays form page-clusters. As a result, the user block-volume comprises a set of logical data pages, aligning with page-cluster. A user logical pages is mapping to a data page. When the raw bit error rate of HDS is about 10^-2, the second-level code can reduce the sector-error-rate to about 10^-4, the third-level code further reduce page-error-rate to about 10^-11. The recoverable burst error length by the first level is 144 B, the second level is 8160 B, the third level is 137088 B.

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Siyi Wang, Qiang Cao, and Changsheng Xie "A multi-level encoded and interleaved data format for holographic data storage with high reliability and high recoverability", Proc. SPIE 12921, Third International Computing Imaging Conference (CITA 2023), 129210C (6 November 2023); https://doi.org/10.1117/12.2687534

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KEYWORDS

Holography

Holographic data storage systems

Data storage

Tolerancing

Reliability

Data modeling

Holograms

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