Webopedia Term of the Day: Journaled File System Defined

“A file system in which the hard disk maintains data integrity
in the event of a system crash or if the system is otherwise halted
abnormally. The journaled file system (JFS) maintains a log, or
journal, of what activity has taken place in the main data areas of
the disk; if a crash occurs, any lost data can be recreated because
updates to the metadata in directories and bit maps have been
written to a serial log. The JFS not only returns the data to the
pre-crash configuration but also recovers unsaved data and stores
it in the location it would have been stored in if the system had
not been unexpectedly interrupted.”


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