I do this in production. As long as none of the filesystems used by the OS (/, /usr, /opt, /var, zone root) are on ZFS you're fine. Any other filesystems such as /home won't get touched by LU and will be mounted on boot (as will any UFS filesystems that aren't involved with the LU process).
One problem you might run into (don't know if it's been fixed yet), is that on lucreate it may try to copy ZFS filesystems to the other filesystems. You'll need to exclude these when doing the lucreate. After you've done an lucreate once, just use lurename and lumake (which is smarter about ZFS than lucreate). Paul This message posted from opensolaris.org
