Upgrading FreeBSd when using a zfs-only installation?

[Andrew Moran]

Hallo,

I switched my system over to using a ZFS on root setup in 8.1.     I want to upgrade it to 8.2.   

Is there any changes to the buildworld/buildkernel/installworld/installkernel/mergemaster routine?    

The only thing I found via google was this:  http://forum.nginx.org/read.php?23,178896,179074     And he does a "mount -u ./" and a "zfs mount -a" but it's not clear to me why he's doing that.

--Andy