Somebody gave me the answer to my question
http://lists.freebsd.org/pipermail/freebsd-questions/2006-November/135179.html
I'm posting it in case somebody hits a similar problem.
>I have a bunch of Ubuntu clients which mount /home at boot time from a
>FreeBSD 6.1 NFS server.
>
>When a client crashe
I have a bunch of Ubuntu clients which mount /home at boot time from a
FreeBSD 6.1 NFS server.
When a client crashes it won't mount /home at boot.
In that case, trying to mount manually gives "can not read super bloc".
The client still appears in the "showmount"output of the server.
Sometimes /
