Solaris ZFS Administration Guide

Upgrading ZFS Storage Pools

If you have ZFS storage pools from a previous Solaris release, such as the Solaris 10 6/06 release, you can upgrade your pools with the zpool upgrade command to take advantage of the pool features in the current release. In addition, the zpool status command has been modified to notify you when your pools are running older versions. For example:

# zpool status
  pool: test
 state: 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.
 scrub: none requested

        NAME        STATE     READ WRITE CKSUM
        test        ONLINE       0     0     0
          c1t27d0   ONLINE       0     0     0

errors: No known data errors

You can use the following syntax to identify additional information about a particular version and supported releases.

# zpool upgrade -v
This system is currently running ZFS pool version 22.

The following versions are supported:

---  --------------------------------------------------------
 1   Initial ZFS version
 2   Ditto blocks (replicated metadata)
 3   Hot spares and double parity RAID-Z
 4   zpool history
 5   Compression using the gzip algorithm
 6   bootfs pool property
 7   Separate intent log devices
 8   Delegated administration
 9   refquota and refreservation properties
 10  Cache devices
 11  Improved scrub performance
 12  Snapshot properties
 13  snapused property
 14  passthrough-x aclinherit
 15  user/group space accounting
 16  stmf property support
 17  Triple-parity RAID-Z
 18  Snapshot user holds
 19  Log device removal
 20  Compression using zle (zero-length encoding)
 21  Deduplication
 22  Received properties

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

Where 'N' is the version number.

Then, you can run the zpool upgrade command to upgrade all of your pools. For example:

# zpool upgrade -a

Note –

If you upgrade your pool to a later ZFS version, the pool will not be accessible on a system that runs an older ZFS version.