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.

EXAMPLES

   Example 1: Upgrading All ZFS Storage Pools to the Current Version
     The following command upgrades all ZFS Storage pools to the current version of the software:
           # zpool upgrade -a
           This system is currently running ZFS version 2.

SEE ALSO

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