Upgrading FreeBSd when using a zfs-only installation?

[Sergiy Suprun]

On Sun, Mar 13, 2011 at 17:40, Andrew Moran <amoran at forsythia.net> wrote:
>
> 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
>
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Hello Andy

Usually I use
zfs mount -a
to mount all and
zfs set readonly=off zpool/system
to take filesystem writable