Although hard disk drives are mostly used for cluster drives, optical disk cluster drive has advantage.[1] The removability of the disks can make cost per magabyte low. This characteristics is especially important for storing video data in video on demand system. This paper describes the simplification of structure of the optical disk cluster drive.
The interleaved Reed Solomon code called long distance code (LDC)
is used for error correction and detection in the recording format of
optical disks to maintain the integrity of recorded data. Performance
evaluation of the code is necessary when the code is applied to another
recording channel such as higher recording density one. Hence a performance
evaluator for LDC was developed. The program evaluates various LDCs by
changing the input parameters of the format. The performance evaluator
consists of a burst error length evaluator and an EDAC performance
evaluator. An ISO/IEC 15041 (540 MB 90mm MO disk) disk was assessed with
this evaluator. The results show that the raw error rate of disks in the
market is low enough for data integrity when defect management is applied.
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