Has anyone got anything that will check/test ncp access to (clustered nss) ncp volumes under oes2sp2?

We have this annoying issue with partial node freezes (sep. post), whereby NCS is not detecting failure (despite monitor scripts, etc.) so resources are allegedly running, though inaccessible....

I'd like to set up nagios process that will create, read and delete a file using ncp (there are several available for smb!), so that we can see when this happens and pro-actively 'sort the lack of services out' (i.e. reboot!! ;-)

Anyone got anything like this?!?