with the most recent firmware there’s been big NFS changes, in general they should result in a more stable connection
NFS now used TCP instead of UDP
see here’s what I see in /proc/mounts
192.168.1.123:/media/Aufs/Action /tmp/media/nfs/192.168.1.123/Action nfs rw,relatime,vers=3,rsize=262144,wsize=262144,namlen=255,hard,nolock,proto=tcp,port=65535,timeo=70,retrans=3,sec=sys,mountport=65535,mountproto=,addr=192.168.1.123 0 0
in general at least for me NFS has been very stable, and this current release just improves the stability
in ubuntu server starting with 13.04
export of aufs directories is supported
as an example that mount I list above Action, is actually comprised of 3 different hard drives
