I just had my main NFS server reboot, and now my clients cannot
mount any of my NFS file systems.  A tcpdump shows the following
sequence of packets:

	client -> server 128 access
	server -> client ok 32 access ERROR: Input/output error

My /etc/exports has=20

	/usr/home	-maproot=3Droot

Mountd is running, so what am I missing?

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