Abstract
This chapter illustrates the propagation of digital data errors through the digital part of the recorder's read channel and reviews the digital data processing techniques that are used to deliver reliable data (i.e., data having a specified statistical error rate) to the user. It focuses on how the various components of the digital recording channel may influence the reliability of data that is recovered from the storage medium. A detailed description of the recording format used in magneto-optical (MO) data storage systems is also discussed in the chapter. The discussion is aimed at disclosing how the recording format contributes to the control of errors. In particular, it describes how one specific recording format, namely the continuous composite servo (CCS) recording format specified in ISO/lEC 10089, contributes to the reliability of the data writing and recovery processes. The chapter also discusses the error types that are generated by hard decision data detection. All digital errors that occur in a digital optical data storage system are created during the data detection process. The chapter also discusses data reliability and describes several methods for estimating data reliability along with error control in future MO storage systems.
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