[SOLVED] mount.nfs: Protocol not supported

Malvineous · 2013-10-30 05:40:29

Hi all,

I upgraded my system yesterday and I have now discovered that I can't mount any NFS mounts. I've been through the suggestions on the forum but I can't resolve the problem. Can anyone offer any suggestions?

$ mount -v /mnt/blah
mount.nfs: timeout set for Wed Oct 30 15:34:58 2013
mount.nfs: trying text-based options 'rsize=32768,wsize=32768,proto=tcp,intr,soft,timeo=50,vers=4,addr=10.138.115.40,clientaddr=192.168.173.208'
mount.nfs: mount(2): No such file or directory
mount.nfs: trying text-based options 'rsize=32768,wsize=32768,proto=tcp,intr,soft,timeo=50,addr=10.138.115.40'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: trying 10.138.115.40 prog 100003 vers 3 prot TCP port 2049
mount.nfs: prog 100005, trying vers=3, prot=6
mount.nfs: trying 10.138.115.40 prog 100005 vers 3 prot TCP port 52593
mount.nfs: portmap query failed: RPC: Program/version mismatch
mount.nfs: Protocol not supported

$ grep blah /etc/fstab
nfs.host.name:/blah/  /mnt/blah       nfs    auto,user,exec,rsize=32768,wsize=32768,proto=tcp,intr,soft,timeo=50,noatime,nodiratime     0  0

Nothing has changed on the server, and I don't know what the 'no such file' error is referring to because both the mount point and the remote directory exist and I have access to it (it worked yesterday.) I'm kind of stuck because I don't know what to try next to even figure out where the problem is! All the kernel modules are loaded, the services appear to be running, LDAP isn't in use, basically no config has changed except for what was upgraded with pacman -Syu.

Any pointers would be much appreciated!

Last edited by Malvineous (2013-10-31 00:23:51)

Malvineous · 2013-10-31 00:23:33

I think I've figured this one out. Turns out the (Debian) server had the "rpcinfo" program missing, which caused it to disable NFS version 3. I guess a recent Arch upgrade disabled NFS version 2 (which I am guessing it had been falling back to until now), so editing the Debian init script to remove "--no-nfs-version 3" and restarting the NFS server fixed the problem! It's now connecting over NFS 3.

schultzter · 2014-04-15 01:01:25

I'm having the same issue since recent Arch updates while connecting to my ReadyNAS Duo v1. It's basically running a SPARC version of Debian, and I can see rpcinfo is there, but I'm having trouble seeing which version of NFS it's serving up. Any idea how to force Arch to use NFSv2 (if that's the issue)? Thanks,

schultzter · 2014-04-15 01:08:33

Ok, figured out how to get to version 2. But I'm still getting the same error.

schultzter · 2014-04-15 16:33:14

Ok. Now I'm not getting the error - everything's working perfectly. I have no idea what happened or why, but it works and that's what I wanted.

Arch Linux

#1 2013-10-30 05:40:29

[SOLVED] mount.nfs: Protocol not supported

#2 2013-10-31 00:23:33

Re: [SOLVED] mount.nfs: Protocol not supported

#3 2014-04-15 01:01:25

Re: [SOLVED] mount.nfs: Protocol not supported

#4 2014-04-15 01:08:33

Re: [SOLVED] mount.nfs: Protocol not supported

#5 2014-04-15 16:33:14

Re: [SOLVED] mount.nfs: Protocol not supported

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