&gt; Arrgh. The same issue in principle, but not in practice. &quot;All the developers&quot; of OpenZFS are Oracle Corporation, plus a few dozen other folks we can grep from the commit log.<p>That&#x27;s just patently not true. All of the BSD and Illumos guys all are the <i>main</i> source of ZFS talent.<p>&gt; (Also, as another poster points out, it&#x27;s possible that all OpenZFS copyright is already assigned to Oracle -- I have no particular knowledge)<p>No, that was how it worked before the OpenSolaris proprietarisation fiasco. Now, everyone retains the copyrights IIRC.