In article <Marcel-1.41-1015132600-d07LJLo@xn027.xemplar.co.uk> sborrill@xemplar.co.uk (Dr. Stephen Borrill) writes:
>One of our sites is often getting errors on the console which are something
>akin to "nfsd send error 55". What is this, what causes it and what should
>I expect to go wrong when it happens? 
>

% fgrep 55 /usr/include/sys/errno.h
#define ENOBUFS         55              /* No buffer space available */

It should not cause corruption on the server, but data updates to
the server can be failing.
Are you running out mbufs?

christos