Solaris Express Community Release, build 39: You can upgrade your storage pools to a newer version to take advantage of the latest features by using the zpool upgrade command. In addition, the zpool status command has been modified to notify you when your pools are running older versions.
If you want to use the ZFS Administration console on a system with a pool from a previous Solaris release, make sure you upgrade your pools before using the ZFS Administration console. To see if your pools need to be upgraded, use the zpool status command. For information about the ZFS Administration console, see ZFS Web-Based Management.