Synology NAS NFS not working since upgrade to 18[SOLVED]

[johng169]

Hi

Since upgrading to LinuxMint 18 (LM18) 64 bit on my dual boot PC I cannot access my Synology NAS
(I can access it through the Win 10 side of the same PC, An iMac and a laptop running LM17 and through the web address on a browser from the LM18 machine

I am running nfs.
The NAS is nfs enabled, the Ip address of the LM18 machine did not change on upgrade and is in the shared list (the fstab is unchanged after the upgrade but given mount does not work from command line cant see that is (yet) the problem

trying the manual approach first:

from a command line
sudo mount 192.168.1.104:/volume1/Photos /mnt/photo (which maps my Photo folder)
returns:
mount.nfs: mount system call failed
(as does sudo mount -a) for all the previously connected drives

tried re-installing nfs through apt-get install nfs-common
returns you are already running latest version (1:1.3.4-2.1ubuntu5)
Q are there any other connected nfs files I should be installing ?

I am not running a firewall on this machine -Gufw firewall is OFF,

Linux Mint 19 cinnamon 3.8.8
Kernel is 4.15.0-33-generic

any clues welcome. Many thanks

[catweazel]

any clues welcome. Many thanks

Try: sudo mount -o vers=3 192.168.1.104:/volume1/Photos /mnt/photo

[johng169]

OK ......

that works

as a matter of interest what does vers=3 do/mean

and btw, thankyou very much

(maybe you are the right way up and its the rest of us that have the problem )
rgds