On Tue, Oct 23, 2012 at 01:55:01PM +0200, Runar Ingebrigtsen wrote: > to enable NFS state transfer between hosts in a failover SAN, it is > necessary to have the NFS state data on the exact same blocks on both > storage nodes: You are reading a document for something which is not glusterfs. > Can I somehow enable block-for-block replication with GlusterFS? No. You are reading documentation for something completely different: a pair of machines synchronised at the block level using DRBD, in a master/slave configuration (that is: all writes must be made on the master side, and the block changes are replicated a la RAID1 but over a network). I suggest you ask a different question: "can I have failover between two gluster NFS servers without getting stale filehandles?" I don't know the answer to that myself, but I have seen messages which suggests others may have it working: http://gluster.org/pipermail/gluster-users/2012-June/010700.html