journaling file system

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journaling file system

A file system that contains its own recovery capability in the event of a failure. In a journaling file system, the information about the changes is recorded in a separate log (the journal) before the indexes to the files are updated. If a power or other system failure corrupts the indexes as they are being rewritten, the operating system can use the log to repair them when the computer is restarted. See file system.
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