This is an old revision of the document!

Note that a much revised and newer port of ZFS exists in the 8.X series (8.1-RELEASE, 8.2-RELEASE) and 9-CURRENT, which has so far proven to be significantly better. Some parts of it were backported to 7-STABLE. Because of this, the list that was hosted on this page is obsolete. New items will appear here if problems in the new code are encountered.

Note that i386 and other 32-bit architectures are still definitely not recommended for use with ZFS due to address space issues.

tmpfs(5) isn't recommended for use with ZFS because it can suddenly run out of space due to interaction with the ZFS ARC. http://lists.freebsd.org/pipermail/freebsd-stable/2011-January/060867.html