In a replicated pool configuration, leverage multiple controllers to reduce hardware failures and to improve performance. For example: 
<cli prompt='#'>
# zpool create mypool1 mirror c1t0d0 c2t0d0
</cli>

Moving ZFS filesystems between pools

    Adding another disk to expand the stripe. 

 # zpool add tank c2t2d0

    Replacing an existing vdev with a larger vdev. For example: 

 # zpool replace tank c0t2d0 c2t2d0

ZFS – How to increase rpool in Solaris
  http://www.unixarena.com/2013/05/zfs-how-to-increase-rpool-in-solaris.html

http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide

Solaris 11 – ZFS Must known features
  http://www.unixarena.com/2013/08/solaris-11-zfs-must-known-features.html

ZFS – ZPOOL Cache and Log Devices Administration
  http://www.unixarena.com/2013/07/zfs-zpool-cache-and-log-devices.html