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.Dd August 9, 2019
.Dt ZPOOL-UPGRADE 8
.Os
.Sh NAME
.Nm zpool-upgrade
.Nd Manage version and feature flags of ZFS storage pools
.Sh SYNOPSIS
.Nm zpool
.Cm upgrade
.Nm zpool
.Cm upgrade
.Fl v
.Nm zpool
.Cm upgrade
.Op Fl V Ar version
.Fl a Ns | Ns Ar pool Ns ...
.Sh DESCRIPTION
.Bl -tag -width Ds
.It Xo
.Nm zpool
.Cm upgrade
.Xc
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
.Nm zpool Cm upgrade Fl a
to enable all features on all pools. (If a pool has specified compatibility
feature sets using the
.Fl o Ar compatibility
property, only the features present in all requested compatibility sets will
be enabled on that pool.)
.It Xo
.Nm zpool
.Cm upgrade
.Fl v
.Xc
Displays legacy ZFS versions supported by the current software.
See
.Xr zpool-features 5
for a description of feature flags features supported by the current software.
.It Xo
.Nm zpool
.Cm upgrade
.Op Fl V Ar version
.Fl a Ns | Ns Ar pool Ns ...
.Xc
Enables all supported features on the given pool. (If the pool has specified
compatibility feature sets using the
.Fl o Ar compatibility
property, only the features present in all requested compatibility sets will be
enabled.)
Once this is done, the pool will no longer be accessible on systems that do not
support feature flags.
See
.Xr zpool-features 5
for details on compatibility with systems that support feature flags, but do not
support all features enabled on the pool.
.Bl -tag -width Ds
.It Fl a
Enables all supported features (from specified compatibility sets, if any) on all
pools.
.It Fl V Ar version
Upgrade to the specified legacy version.
If the
.Fl V
flag is 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.
.El
.El
.Sh SEE ALSO
.Xr zpool-features 5 ,
.Xr zpoolconcepts 8 ,
.Xr zpoolprops 8 ,
.Xr zpool-history 8