ZFS ストレージプールをアップグレードする

以前の Solaris リリースの ZFS ストレージプールがある場合は、zpool upgrade コマンドを使ってそのプールをアップグレードすれば、最新リリースのプール機能を利用できます。また、古いバージョンのプールを実行している場合は、zpool status コマンドによって知ることができます。例:

# zpool status
  pool: tank
 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
config:
        NAME        STATE     READ WRITE CKSUM
        tank        ONLINE       0     0     0
          mirror-0  ONLINE       0     0     0
            c1t0d0  ONLINE       0     0     0
            c1t1d0  ONLINE       0     0     0
errors: No known data errors

次の構文を使って、特定のバージョンやサポートされるリリースに関する追加情報を確認できます。

# zpool upgrade -v
This system is currently running ZFS pool version 33.

The following versions are supported:

VER  DESCRIPTION
---  --------------------------------------------------------
 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
 23  Slim ZIL
 24  System attributes
 25  Improved scrub stats
 26  Improved snapshot deletion performance
 27  Improved snapshot creation performance
 28  Multiple vdev replacements
 29  RAID-Z/mirror hybrid allocator
 30  Encryption
 31  Improved 'zfs list' performance
 32  One MB blocksize
 33  Improved share support
 34  Sharing with inheritance

For more information on a particular version, including supported releases,
see the ZFS Administration Guide.

これで、zpool upgrade コマンドを実行してすべてのプールをアップグレードできます。例:

# zpool upgrade -a