Once upon a time, Joerg Schilling Joerg.Schilling@fokus.fraunhofer.de said:
Note that it is without doubt that ZFS was not derived from the Linux kernel and thus cannot be a derived work.
All that matters for CentOS is:
1: Red Hat doesn't ship ZFS because of Red Hat's lawyers' interpretation of GPL+CDDL 2: Arguing about it here will not change #1 3: CentOS ships a clone of Red Hat Enterprise Linux and so won't have things that Red Hat's lawyers don't approve (see #2)
Please let it go. I think everybody here knows your opinion.