See my earlier posting "Mounting NFS file systems r/w" for the whole story.
I discovered that if I include anon=0 in the /etc/dfs/dfstab on the server
that I can then write to the file system on the client.
Example from /etc/dfs/dfstab:
share -F nfs -o rw=dswsun,anon=0 /opt/proeng
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Leo Crombach Phone: (716) 388-3566
System/Network Administrator Email: lcrombach@tropel.com
Tropel Corporation URL: http://www.tropel.com
60 O'Connor Road
Fairport, New York 14450
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