Optical storage: an emerging option in long-term digital preservation

Abstract

Long-term digital preservation is an important issue in data storage area. For years, magnetic media based solutions, such as tape and hard disk drive (HDD) based archive systems, monopolize the data archiving market due to their high capacity and low cost. However, in the era of big data, rapidly increasing volume, velocity, and variety of data set bring numerous challenges to the archive systems in various aspects, such as capacity, cost, performance, reliability, power consumption, and so on. In recent years, high capacity optical media, such as blu-ray discs (BDs) and holographic discs, emerge with the revival of optical storage. Due to the natural simple construction of the optical media, the archive systems based on those optical media, e.g., BD library, demonstrate attractive properties, such as cost per bit, reliability, power consumption, and so on, thus become feasible options in long-term digital preservation. In this paper, we reviewed and compared both the magnetic and optical media based solutions for long-term digital preservation, followed by a summarization on techniques to improve the optical media based archive system.

Keywords

blu-ray disc (BD) / long-term digital preservation / optical storage

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Acknowledgements

This work was supported in part by the National Basic Research Program of China (No. 2011CB302303), the National High Technology Research and Development Program of China (No. 2013AA013203), the National Natural Science Foundation of China (Grant No. 60933002), and the Fundamental Research Funds for Central Universities, Huazhong University of Science and Technology, (No. 2013KXYQ003). This work was also supported by Key Laboratory of Data Storage System, Ministry of Education.

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg