All the ZFS web pages confused the hell out of me when I first started using ZFS because they kept talking about creating a zpool called "tank" when I was trying to use ZFS software RAID to mirror my existing pool called "rpool". Then I finally found this web page which gives a simple explanation of how to do it:
http://darkstar-solaris.blogspot.com/2008/09/zfs-root-mirror.html ...and after that everything just worked. This video tutorial is good too for showing the ZFS snapshot / rollback features: http://webcast-west.sun.com/interactive/09A12416/index.html -- This message posted from opensolaris.org