Zpools are self contained, so as stated before its safe. In upgrades like this I often will actually pull or disconnect the zpool disks just for paranoia sake.
As for the config of the existing machine, keeping a copy of /etc is never a bad idea. I typically will rsync a copy of it out somewhere, either to another server or in a case like this to the zpool... that way you have a fallback copy of the system config just in case. Upgrades get even easier if you put filesystems like /opt or /usr/local on the zpool. Post-install just mount /opt and /usr/local from the zpool (zfs set mountpoint=/usr/local pool/local && zfs mount -a). I frequently upgrade my Nevada boxes (read: reinstall) and ZFS makes like a lot simpler. This message posted from opensolaris.org _______________________________________________ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org