> From: Richard Elling [mailto:richard.ell...@gmail.com]
> At some point, people will bitterly regret some "zpool upgrade" with no way
> back.
> uhm... and how is that different than anything else in the software world?
> No attempt at backward compatibility, and no downgrade path, not even by
> going back to an older snapshot before the upgrade.
> ZFS has a stellar record of backwards compatibility. The only break with
> backwards
> compatibility I can recall was a bug fix in the send stream somewhere around
> opensolaris b34.
> Perhaps you are confusing backwards compatibility with forwards
> compatibility?

Semantics.  New version isn't compatible with old version, or old version isn't 
compatible with new version.  Either way, same end result.

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