Pc's dropping connection to NFS

Hi there.

I have a problem with pc's dropping their mounts to a network Nas. The Nas is a Synology DiskStation, it has enough concurrent connections which I think off the top of my head is about 200 and I only need 120.

So, question 1 is why will a unix box drop a mount, and 2, how can I stop it happening?

Many thanks.

Firstly, Synology kit is known for some idiosyncratic behaviour.

Using NFS with Synology - General Discussion - OSMC Forums

Second, the question is: Are the clients using the same NFS version (V2, 3 or 4) as the Synology?????

NFS 3 being much simpler that NFS 4, I would be inclined to set all boxes to V3 and see how that behaves.

Is there any pattern as to when NFS connections cease to function? Any error messages produced?

Also, on most operating system implementations of 'mount', you can set which version (2,3, or 4) of NFS to use on the mount command line.