How to Shrink a ZFS Root Pool, Solaris 11.1, SPARC ?

Please see interesting Blog at:
https://blogs.oracle.com/jhenning/entry/shrink_a_zfs_root_pool

Fromm the Blog:

A root pool cannot be shrunk in a single operation, but it can be copied to a smaller partition. The Solaris 11 beadm command makes the task easier than it used to be. In this example, the pool is copied, and then mirrored.

1. Use format to create a smaller partition on a new device, say c0tXs0
2. # zpool create -f newpool c0tXs0
3. # beadm create -a -d "smaller s11.1" -p newpool solaris-SRUnn
4. Use {ok} probe-scsi-all and
   {ok} devalias to identify the new disk