Identifying writes to NFS

I'd like to be able to reliably recognise a PATH record which refers to an NFS mount. It seems that dev=00:xx would be related to the answer. However, each mount seems to have its own value of xx, and other mounts not backed by a block device, eg /proc and /dev, also have dev=00:xx. The answer can't be related to a single system, as the solution has to be rolled out across a large estate with a variety of nfs mounts on particular servers. Any ideas? Thanks, Matt -- Matthew Booth, RHCA, RHCSS Red Hat, Global Professional Services M: +44 (0)7977 267231 GPG ID: D33C3490 GPG FPR: 3733 612D 2D05 5458 8A8A 1600 3441 EA19 D33C 3490