Mirroring root on Solaris 10

[Karl.Rossing at Federated.CA]

Managers,

My Solaris 8 mirroring procedure for root was using disksuite was

Add root to a concat -> create another concat for the mirror -> mirror 
both concat's.

I'm trying the same thing on solaris 10 but i'm getting
/usr/sbin/metainit d0 1 1 /dev/rdsk/c1t0d0s0
metainit: whosyourdady: c1t0d0s0: is mounted on /

How do i mirror root swap and /var on s10?

KFR