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Pretty obviously, file management code has to be completely bulletproof. Some things to consider are:

* Multiple tasks accessing the same file simultaniously - how do you handle several task trying to write to the same file at the same time? * Medium failure. All storage media is, to some extent, subject to failure. You have to ensure that you can detect and handle media failure. * Where do you store the file information? There are a number of approaches; you could use a FAT (file attribute table) , which is a simple system but, obviously, if you lose the FAT you lose the entire file system. More sophisticated systems use a database to hold file information - making searching for files much faster.

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