UFS

Filesystems
Virtual Filesystems
VFS
Disk Filesystems
FAT 12/16/32, VFAT, ExFAT Ext 2/3/4 LEAN HPFS NTFS HFS HFS+ MFS ReiserFS FFS (Amiga) FFS (BSD)/UFS BeFS BFS XFS SFS ZDSFS ZFS USTAR
CD/DVD Filesystems
ISO 9660 Joliet UDF
Network Filesystems
NFS RFS AFS
Flash Filesystems
JFFS2 YAFFS

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Not to be confused with Amiga FFS.

UFS (UNIX File System) also known as FFS (Fast File System) is not a single filesystem but a family of filesystems used by BSD derivatives, such as FreeBSD, NetBSD, OpenBSD and others. Introduced in 4.2BSD, it is a direct descendant of the original UNIX V7 filesystem.

About FFS / UFS (BSD)

What is usually called a "partition" is called a "slice" in *BSD, which is in turn subdivided into "partitions" - a naming pattern that leads to some confusion, and to rather cryptic device names (ad0s1c for the third partition on the second slice on the primary master ATAPI hard drive...).

See Also

External Links

• ffs(4) - FreeBSD manpage on FFS.
• fs(5) - NetBSD manpage describing the superblock structure of its FFS implementation.
• fs(5) - OpenBSD FFS superblock description.
• File System Forensic Analysis - The "UFS1 and UFS2 Data Structures" Chapter