Hi again, I managed to make room by cat /dev/null to some files (I could do this on some files only). After that I could beadm destroy opensolaris-3 and I'm cleaning up my rpool for the upgrade process.
I should trim my rpool, as I can't grow it with "zpool add". A real pity, indeed. Time to do some filesystem thrashing. Thanks anyway, Antonio -- This message posted from opensolaris.org