Код:
timeout=<value>
Set the initial retransmit timeout to the specified
value, expressed in tenths of a second. May be useful
for fine tuning UDP mounts over internetworks with high
packet loss rates or an overloaded server. Try increas-
ing the interval if nfsstat(1) shows high retransmit
rates while the file system is active or reducing the
value if there is a low retransmit rate but long response
delay observed. (Normally, the dumbtimer option should
be specified when using this option to manually tune the
timeout interval.)
timeo=<value>
Alias for timeout.
а ещё монтируйте с опциями soft, intr,bg,