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The integrity of a mass storage file system can substantially exceed that of the hardware and software involved. This effect has been obtained at Cambridge University where such a file system forms an essential part of a multi-access system. A fixed disc store is backed up with magnetic tape and this configuration forms the basis of a design study which seeks to identify the problems and principles involved in file management. The result is simple but effective and involves a two tier file dumping system.
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A. G. Fraser (1969) studied this question.
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