UFS (the Unix File System) is a filesystem commonly used on Unix systems in the 1980's and 1990's. It was originally developed for BSD Unix under the name Fast File System (FFS), and later adopted by AT&T for System V Release 4 (SVR4).
Backups may be done with the ufsdump archiver (known simply as dump on older systems).
- A Fast File System for UNIX, Marshall Kirk McKusick, William N. Joy, Samuel J. Leffler, & Robert S. Fabry; Computer Systems Research Group, Univ. of California Berkeley. Revised February 18, 1984.
- Solaris 10 System Administration Guide: UFS File System (Reference)
- Design and Implementation of the FreeBSD Operating System, 2nd Edition, ISBN 978-0-321-96897-5
- Solaris Internals, 2nd Edition, ISBN 0131482092 — Chapter 15: The UFS File System
- Information about Soft Updates, Snapshots, and Back-ground Fsck
- UFS Direct I/O
- Wikipedia:Unix File System