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Subject: [Bug 190462] request: don't active feature flags when upgrading zfs
 pool
Date: Wed, 26 Jul 2017 18:05:21 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D190462

--- Comment #2 from Allan Jude <allanjude@FreeBSD.org> ---
This is not really a concern. Most all features can be in the 'enabled' sta=
te,
and still be imported by older versions of ZFS. It is the 'active' state, t=
hat
means one or more datasets is currently using that feature, and that a syst=
em
requires that feature in order to read the data. Destroying the last dataset
that is using that feature (for example, the skein hashing algo), will reve=
rt
that feature to 'enabled', and the pool can be imported on a system without
that feature.

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