It might be wise to add the
intr option to any
/etc/fstab entries that might end up hanging or crashing. If you don't use the
intr options, then when the server hosting the NFS files goes down, the server on which the files are mounted (the client) may hang when booting up.
man 5 nfs:
= = =
soft / hard
Determines the recovery behavior of the NFS client after an NFS request times out. If neither option is specified (or if the hard option is specified), NFS requests are retried indefinitely. If the soft option is specified, then the NFS client fails an NFS request after retrans retransmissions have been sent, causing the NFS client to return an error to the calling application.
= = =
... and then it goes on to say
intr is preferred over
soft, but it has the similar effect of preventing hanging.