zfs upgrade

# zpool list
NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
mypool                  232G    100K    232G     0%  オンライン  -

# zpool status
  プール: mypool
 状態: ONLINE
status: The pool is formatted using an older on-disk format.  The pool can
        still be used, but some features are unavailable.
action: Upgrade the pool using 'zpool upgrade'.  Once this is done, the
        pool will no longer be accessible on older software versions.
 スクラブ: scrub completed: Thu May 11 14:32:05 2006
 で 0 のエラー構成:

        NAME        STATE     READ WRITE CKSUM
        mypool      オンライン     0     0     0
          c2t0d0    オンライン     0     0     0

errors: No known data errors
 
# zpool upgrade
This system is currently running ZFS version 2.

The following pools are out of date, and can be upgraded.  After being
upgraded, these pools will no longer be accessible by older software versions.

VER  POOL
---  ------------
 1   mypool

Use 'zpool upgrade -v' for a list of available versions and their associated
features.

# zpool upgrade -v                                                                                                       
This system is currently running ZFS version 2.

The following versions are suppored:

VER  DESCRIPTION
---  --------------------------------------------------------
 1   Initial ZFS version.
 2   Ditto blocks (replicated metadata)

For more information on a particular version, including supported releases, see:

http://www.opensolaris.org/os/community/zfs/version/N

Where 'N' is the version number.