The concept of a journaling file system means that it logs all changes in files to a journal as it goes, that way if something gets damaged, it's easier to locate and fix it.
When you create a file, delete a file, modify/rename/edit/save/anything to any file/folder, the file system keeps a log entry of what, where, and when of that. If damage occurs to the file system (power outage, drive damage), there's a good chance that chkdsk will be able to back-track that log, and reconstruct the files.
First answer by Shadowmaster. Last edit by Shadowmaster. Contributor trust: 53 [recommend contributor]. Question popularity: 13 [recommend question]
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