NAME

     zpool-upgrade — manage version and feature flags of ZFS storage pools

SYNOPSIS

     zpool upgrade
     zpool upgrade -v
     zpool upgrade [-V version] -a|pool…

DESCRIPTION

     zpool upgrade
             Displays pools which do not have all supported features enabled and pools formatted
             using a legacy ZFS version number.  These pools can continue to be used, but some
             features may not be available.  Use zpool upgrade -a to enable all features on all
             pools (subject to the -o compatibility property).

     zpool upgrade -v
             Displays legacy ZFS versions supported by the this version of ZFS.  See
             zpool-features(7) for a description of feature flags features supported by this
             version of ZFS.

     zpool upgrade [-V version] -a|pool…
             Enables all supported features on the given pool.

             If the pool has specified compatibility feature sets using the -o compatibility
             property, only the features present in all requested compatibility sets will be
             enabled.  If this property is set to legacy then no upgrade will take place.

             Once this is done, the pool will no longer be accessible on systems that do not
             support feature flags.  See zpool-features(7) for details on compatibility with
             systems that support feature flags, but do not support all features enabled on the
             pool.

             -a      Enables all supported features (from specified compatibility sets, if any)
                     on all pools.

             -V version
                     Upgrade to the specified legacy version.  If specified, no features will be
                     enabled on the pool.  This option can only be used to increase the version
                     number up to the last supported legacy version number.

SEE ALSO

     zpool-features(7), zpoolconcepts(7), zpoolprops(7), zpool-history(8)