What do you mean by 'replant'? I don't think you convert zfs/zpools to ufs. But you can mount a ufs volume in OpenSolaris and then copy the data across (with rsync for example). Essentially a migration.
2: not a proper answer, as I have not tried it myself: use of format, fdisk and mount is what you need to research. The man pages should be a good start. Hope that helps a bit, Martin -- This message posted from opensolaris.org