My guess as to the issue you’re seeing could be a couple things.
NFS isn’t loading so the starting point would be to make sure the nfs server is running.
Most systems now use nfs in conjunction with rpcbind. Some Debian based systems use portmap so replace rpcbind with portmap if necessary.
Try to verify nfs server is running. On Redhat based systems the code to make sure should be:
[code]sudo service rpcbind restart
sudo service nfs restart[/code]
On Debian based systems it should be:
[code]sudo service rpcbind restart
sudo service nfs-kernel-server restart[/code]
The next step is to verify your permissions are correct on the /images folder (or what ever directory structure you’re using for your images).
[code]chmod -R 777 /images[/code]
The last thing to verify is to ensure .mntcheck files are in the right places. The commands below should verify.
[code]rm -rf /images/{.mntcheck,/dev/.mntcheck}
touch /images/.mntcheck /images/dev/.mntcheck
chmod -R 777 /images[/code]
Hopefully this helps you out.