Well it turns out the answer to mirroring your root volume post install is actually incredibly simple.
http://darkstar-solaris.blogspot.com/2008/09/zfs-root-mirror.html This worked like a charm. The obvious answer was just to attach the second drive to the zpool with the mirror option. Note you need to use the prtvtoc (Volume Table of Contents) command to copy the VTOC from old to new drive - if you a Linux guy think of this as the same thing as copying the partition table using sfdisk. Thus, the drive you are adding needs to have the same (or larger) geometry. Careful though! Note all "500GB" drives are the same - if you are unsure just check the CHS and total LBA sectors of the drive to be sure. But using the above procedure allows you to mirror your root volume after install and takes literally a few minutes. It is very slick. Cheers, VegaBlue -- This message posted from opensolaris.org