> OpenZFS is free and open source but that license has been determined to NOT be GPL compatible by some lawyers.
Oh? And let me tell you there is more than a boat load of lawyers who disagree.
See the links on page you linked to (!): http://www.networkworld.com/article/2301697/smb/encouraging-...
> There is a bunch of explanations and legal opinions here.
Did you read the text of that page or any of the linked articles? The OpenZFS position is clear: "However, there is nothing in either license that prevents distributing it in the form of a binary module or in the form of source code."