ZFS Pool Alert - Upgrade

[yena]

I have notice this allert on my second zfs pool:

status: Some supported features are not enabled on the pool. The pool can
still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
the pool may no longer be accessible by software that does not support
the features. See zpool-features(5) for details.

Have i to do something ?
Thanks!

 

[StefanC]

I just noticed the same thing. It probably happened after I upgraded to 5.1, but I just didn't notice it. Is it safe to upgrade the zpool?

 

[Chicken76]

If you don't know about the new features, then you don't need them.
I would leave the pools as they are, at least for a little while longer, in case you need to go back to an older version of ZFS.