Netgear Readynas Duo, NFS and Debian Sid: mount.nfs: Operation not permitted

ReadyNAS Duo mount.nfs: Operation not permitted
Today I spend some time to mount one folder on Readynas Duo with NFS. All goes right from server (Debian Lenny) but i can’t mount NFS partitions from my pc (Debian Sid).

Error was “mount.nfs: Operation not permitted “.

Ok, I check my mount options

#cat /etc/fstab <ipaddress>:/c/folder  /mnt/folder nfs rw,user,noauto 0       0

Fstab is ok but problem persists.

Request mount to be verbose (from my pc – debian sid)

<myhost>:/home/giulio# mount -v /mnt/folder
mount.nfs: timeout set for Sun Jan 17 13:34:47 2010
mount.nfs: trying text-based options 'addr=<readynas-ip-address>,vers=4,clientaddr=<my-pc-address>'
mount.nfs: mount(2): Operation not permitted
mount.nfs: Operation not permitted

Request mount to be verbose (from my server – debian lenny)

mount.nfs: trying <readynas-ip-address> prog 100003 vers 3 prot TCP port 2049
mount.nfs: trying <readynas-ip-address> prog 100005 vers 3 prot UDP port 3078
<readynas-ip-address>:/c/folder on /mnt/folder type nfs (rw,noexec,nosuid,nodev,noauto,user)

Wow, ok, there is a difference.

My pc try to mount nfs with version 4, my server doesn’t use v4,  but it uses v3!

What is strange?
I’ve read a lot of tutorial/faq but my problem remains. So I read man pages but this is what I find, for example in man mount.nfs…

mount.nfs is meant to be used by the mount(8) command for mounting NFS shares. This subcommand, however, can also be used as a standalone command
with limited functionality.

mount.nfs4 is used for mounting NFSv4 file system, while mount.nfs is used to mount NFS file systems versions 3 or 2.  remotetarget is  a  server
share usually in the form of servername:/path/to/share.  dir is the directory on which the file system is to be mounted.

It seems to be false. On my pc I use mount.nfs and always mount tries with nfs4.

Ok, let’s go to solution..

You can force the NFS version to use with nfsvers=3.

So I change my /etc/fstab like this:

<readynas-ip-address>:/c/folder /mnt/folder nfs rw,user,noauto,nfsvers=3  0       0

Now mount uses the right version and all goes well.

Bye!

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About Giulio Turetta

Sviluppo e curo siti web dal 1998, amo internet e le opportunità che ci offre. Grazie anche a te, che fai parte di questo mondo fantastico.

7 responses to “Netgear Readynas Duo, NFS and Debian Sid: mount.nfs: Operation not permitted”

  1. marco says :

    Tk! i’ve te same trouble, but now it’s resloved

  2. pipex says :

    Hi Giulio tnk for your post… I solved my nfs problems on debian testing ;)

    bye

  3. adam says :

    I have to say, very nice explination of the problem i was having.

    Good research.

    Thanks for putting this up for me to resolve the similar issue. Its people like you who actually solve it.. then tell everyone else is what makes the open source community amazing!

  4. Nicolas says :

    Hi,
    Thanks for your explaination. It works for me :
    ii nfs-common 1:1.2.1-3

    Best regards
    Nicolas

  5. Alex Is says :

    Same problem here! Thanks for the tip!

  6. Ewoudt says :

    Thanks, I had the same problem!

Trackbacks / Pingbacks

  1. Debian: mount.nfs: Operation not permitted | Picando Código - February 5, 2010

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