Why ReiserFS? It&#x27;s pretty much a defunct filesystem at this point. It&#x27;s not really in the same class as ZFS and Btrfs, if you want a third option maybe look at HammerFS? Although I think pretty much everyone is waiting for Hammer2.<p>There was a talk &quot;Why OpenBSD sucks&quot; by Henning Brauer, where he complains that ZFS is a &quot;kitchen sink&quot; approach to a filesystem. He doesn&#x27;t really explain further, but it would be interesting to hear someone elaborate that criticism.