zfs-upgrade — manage on-disk version of ZFS filesystems

zfsupgrade
         Displays a list of file systems that are not the most recent version.

       zfsupgrade-v
         Displays a list of currently supported file system versions.

       zfsupgrade [-r] [-Vversion] -a|filesystem
         Upgrades  file systems to a new on-disk version.  Once this is done, the file systems will no longer be
         accessible on systems running older versions of ZFS.  zfssend streams generated from new snapshots  of
         these file systems cannot be accessed on systems running older versions of ZFS.

         In  general,  the  file  system  version is independent of the pool version.  See zpool-features(7) for
         information on features of ZFS storage pools.

         In some cases, the file system version and the pool version are interrelated and the pool version  must
         be upgraded before the file system version can be upgraded.

         -Vversion  Upgrade to version.  If not specified, upgrade to the most recent version.  This option can
                     only  be  used  to  increase  the  version  number,  and only up to the most recent version
                     supported by this version of ZFS.

         -a          Upgrade all file systems on all imported pools.

         filesystem  Upgrade the specified file system.

         -r          Upgrade the specified file system and all descendent file systems.

       zfs-upgrade — manage on-disk version of ZFS filesystems

zpool-upgrade(8)

OpenZFS                                           June 30, 2019                                   ZFS-UPGRADE(8)

zfsupgradezfsupgrade-vzfsupgrade [-r] [-Vversion] -a|filesystem