According to this article, Oracle and NetApp have agreed to settle their patent dispute regarding ZFS.

“Announced this morning via NetApp’s website, the companies have agreed to dismiss their pending patent litigation, which began when NetApp sued Sun Microsystems in September of 2007 and became Oracle’s problem when it acquired Sun last year. NetApp and Oracle are tight-lipped about the matter only stating that they both “seek to have the lawsuits dismissed without prejudice” and that the terms of the agreement are confidential.”