Solaris 11 EA (Sep 2011 build 173) updated zpool version to 33:
$ 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 (Solaris Nevada b130 Dec 2009) 23 Slim ZIL 24 System attributes 25 Improved scrub stats 26 Improved snapshot deletion performance 27 Improved snapshot creation performance 28 Multiple vdev replacements (ZFS for Linux) 29 RAID-Z/mirror hybrid allocator 30 Encryption 31 Improved 'zfs list' performance (Solaris 11 Express b151a Nov 2010) 32 One MB blocksize 33 Improved share support (Solaris 11 EA b173 Sep 2011)