A fully working file system using software to function as a storage device in place of physical memory.
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Create, format, and mount a file system, including formatting the inode table and necessary structures
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Can mount an existing file system (uses a file to represent cold storage of the filesystem.)
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can unmount a file system and store its contents to a file to be preserved
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create file (or directory)
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move file
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write to file
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read from file
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delete file