The following system call errno values
are the result of various NFS call failures:
A system call was interrupted when the intr
option was used on a hard-mounted filesystem.
A user attempted to access a file without proper credentials. This
error is usually caused by mapping root or
anonymous users to nobody, a user that has
almost no permissions on files in the exported filesystem.
The superuser attempted to unmount a filesystem that was in use on
the NFS client.
The fileserver has run out of room on the disk to which the client is
attempting an NFS write operation.
An NFS client has asked the server to reference a file that has
either been freed or reused by another client.
An attempt was made to NFS-mount a filesystem that is itself
NFS-mounted on the server. Multihop NFS-mounts are not allowed.
This error is reported by mount on the NFS