Main Page | See live article | Alphabetical index FFS is a file system used mostly by Unix operating systems. It is similar to UFS and the two share a common ancestry. This article is a stub. You can help Wikipedia by fixing it. External Links Until a fuller entry appears here, here is a post on HURD help mailing list about the relation between UFS and FFS. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.