Oracle Solaris ZFS Administration Guide

Overview of ZFS Versions

New ZFS pool and file system features are introduced and accessible by using a specific ZFS version that is available in Solaris releases. You can use the zpool upgrade or zfs upgrade to identify whether a pool or file system is at lower version than the currently running Solaris release provides. You can also use these commands to upgrade your pool and file system versions.

For information about using the zpool upgrade and zfs upgrade commands, see Upgrading ZFS File Systems (zfs upgrade) and Upgrading ZFS Storage Pools.