The <tt>ufs</tt> directory holds the code for the Berkeley Fast Filesystem,
which is the filesystem used on locally mounted hard and floppy disks.<p>

The 4.3BSD Internals book by Leffler, McKusick, Karels and Quarterman
covers <tt>ufs</tt> in:

<dl>
<dt> <b>Chapter 7</b>, pp 187-223 <i>The Filesystem</i>.
</dl>
<p>