upgrade 9.2 partitions question

I want to upgrade a box from 9.1 to 9.2. The only partition I can select for upgrade is / (the one with fstab on it). All the others are marked 'unknown'. What about these others I have, /var, /usr, /srv and so on? I want to upgrade those as well. Will yast mount them and upgrade those too? Confused, Steve.