4.2 NFS Clients Data accessed by UNIX® and NFS clients is not supported in this release and will not trigger a virus scan of a requested file. The risk of virus attacks is low for UNIX and NFS data because few viruses are targeted at platforms other than Windows.
This is a pretty old post so I am hoping that this is still not the case. Regardless of what OS a virus is written for, you should not overlook the need for the ability to scan NFS volumes. Remember, these are shared storage devices. Some companies use this space for hosting web pages. All sorts of files and code are stored and should be scanned before being stored so that when they are called upon by a client system, they are not spreading infected files that they have been harboring. To add, just because there is not a lot of viruses for unix based OS's, does not mean tomorrow there will not be dozens more. If you look at Mac OS, they have touted that they do not get viruses. Well since they bragged, they have had hundreds of new viruses written for them. I think that your dev team at NetApp needs to be a little more forward thinking before they too get caught with their pants down.