Goal: mount a UNIX NAS (WD myCloud) to a UNIX router.

What has been done (do not assume it is correct):

  1. Checked router is running NFS client:

    ps | grep nfsd 

    19243 username 1376 R grep nfsd

  2. Checked NAS is running NFS server from macbook:

    rpcinfo -T udp 192.168.X.XXX | grep nfs
       100003       2     tcp          nfs        unknown
       100003       3     tcp          nfs        unknown
       100003       2     udp          nfs        unknown
       100003       3     udp          nfs        unknown
  3. Attempt to mount NAS directory use syntax:

    mount -t nfs server_IP_addr:/share_name /local_mount_point

    mount -t NFS 192.168.X.XXX:/shares/Public/Data /mnt/nas

    The error response:

mount: mounting 192.168.X.XXX:/shares/Public/Data/ on /mnt/nas failed: No such device

I am interested in understanding how to diagnose the cause of 'no such device'. Is there a procedure (series of command-line tests) that systematically flush out the issue?

Updates / Detailed Responses to Questions / Requests:

nfs server module not found and unable to load:

root@WDMyCloud root # service nfs status
-sh: service: not found
root@WDMyCloud root # systemctl status nfs-server
-sh: systemctl: not found
root@WDMyCloud root # lsmod | grep nfs
root@WDMyCloud root # modprobe nfs
modprobe: chdir(/lib/modules): No such file or directory   
root@WDMyCloud root # ipkg
-sh: ipkg: **not found**

ps command:

root@WDMyCloud root # ps | grep -i nfs
  375 root         0 SW<  [nfsiod]
 2813 root         0 SW   [nfsd]
 2814 root         0 SW   [nfsd]
 2815 root         0 SW   [nfsd]
 2816 root         0 SW   [nfsd]
 2817 root         0 SW   [nfsd]
 2818 root         0 SW   [nfsd]
 2819 root         0 SW   [nfsd]
 2820 root         0 SW   [nfsd]
11491 root      2592 S    grep -i nfs

showmount -e 192.168.X.X returns an empty export list

  • I'm not sure that NFS-server is started. What service is responsible for NFS-server? Please, show output on: 'systemctl status nfs-server' or 'service nfs status'. – Yurij Goncharuk Mar 12 '18 at 9:59
  • 1
    Also check if the nfs module is loaded with lsmod | grep nfs or just insert it with modprobe nfs. To see more info, you could add -v to your mount command. – Thomas Mar 12 '18 at 10:55
  • @Thomas Please see update in OP for results. Server nfs module is not loaded and modprobe fails. ipkg also fails – gatorback Mar 12 '18 at 14:45
  • @YurijGoncharuk Both commands are unavailable and ipkg is unavailable – gatorback Mar 12 '18 at 14:48
  • @gatorback Hmm... Do you have '/shares/Public/Data' in '/etc/export'? Try to see in logs on NFS-server (/var/log/messages or something else) for events like NFS. What say 'mount -v'? P.S. Maybe it's typo, but no need to write 'nfs' in 'mount' command in uppercase. – Yurij Goncharuk Mar 12 '18 at 15:18

Special thanks to YurijGoncharuk who spent hours experimenting with NFS.

How to Mount a WD MyCloud NAS to Asus Merlin Router

  • Don't forget to mark this post as solver. And 'show mount' has typo - 'showmount'. – Yurij Goncharuk Mar 13 '18 at 9:02

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