The ZFS version pages ( http://www.google.ca/search?hl=en&safe=off&rlz=1B3GGGL_enCA220CA220&q=+site:www.opensolaris.org+zfs+version ) are undocumented on the main page, as far as I can see. The root /versions/ directory should be listed on the main ZFS page somewhere, and contain a list of all the different ZFS versions. This message posted from opensolaris.org