FFS vs. UFS vs. UFS2

[Lowell Gilbert]

"Loren M. Lang" <lorenl at alzatex.com> writes:

> FreeBSD's main file system is currently UFS2, but I've also heard
> reference to UFS and the Berkeley Fast File System(FFS).  Looking
> through the kernel source I've found directories for both ufs and ffs,
> but not ufs2 (/sys/ufs/{ufs|ffs}/).  Also, it seems like Solaris and/or
> other commercial unices also used ufs, is this the same ufs used in BSD
> and how does this relate to ffs and ufs2?

See the FAQ list for UFS2.
http://sixshooter.v6.thrupoint.net/jeroen/faq.html#UFS-DIFF-FFS