nfs mount using nfsv3 with HPUX fails

mpqcman · 10-27-2005, 08:40 AM

I'm having a peculiar problem with nfs on linux. I am trying to mount and use an nfs-shared directory, shared from an HPUX machine, mounting it on a linux box. I can mount it in all instances, but I can only "ls" the directory if I mount it using nfs version 2 or 1. If I mount it using nfs version 3, I get an Input/Output error if I try to list the directory ("ls"):

mount -o soft,intr hphost:/directory /mnt/cdrom
ls
<long wait, 30 secs.>
ls: reading directory /mnt/cdrom: Input/output error

If I use nfs version 1 or 2, all is well:
mount -o soft,intr,nfsvers=2 hphost:/directory /mnt/cdrom
ls
whatever files
are there

"soft,intr" are just there so I can bail out of a broken command. Otherwise, I wait forever, and have to reboot the machine to get rid of the shell session.

MensaWater · 10-27-2005, 08:57 AM

From "man nfs" on my Debian:

"nfsvers=n
Use an alternate RPC version number to con_tact the NFS daemon on the remote host. This option is useful for hosts that can run multiple NFS servers. The default value is version 2."

Haven't tried it but seems if you add "nfsver=3" to your options it might help.

mpqcman · 10-27-2005, 09:32 AM

I guess I wasn't clear enough. Default is nfsvers=3, but that is the version that chokes. if I use:
mount -o soft,intr,nfsver=3..., it fails, and that is default. Other boxes with similar loads (same set of CD's, e.g.) take nfsvers=3 just fine. This ONE install won't, and I don't understand what I am doing wrong with the install to hose nfs.

MensaWater · 10-27-2005, 09:39 AM

My bad - missed the nfsver in your options.

Since you say it works on systems that are apparently the same build it suggests to me slightly different libraries or binaries. You might want to cksum the mount command on this server and another server where it works to see if they are in fact the same.

madluther · 10-27-2005, 10:40 AM

This is probably a server side problem, I'd guess that your setup of HPUX doesnt support V3 NFS. On a linux nfs server the command "rpcinfo -p | grep nfs" would list the versions supported, this command also works on AIX, I dont have access to HPUX to test.

For a server that supports V2 and V3 the output should look something like this...

Code:

# rpcinfo -p | grep nfs
    100003    2   udp   2049  nfs
    100003    3   udp   2049  nfs

HTH

Mad.

MensaWater · 10-27-2005, 11:14 AM

FYI: HP-UX 10.20 does NOT support version 3 but 11i DOES.

However he is saying that the export from HP to other servers using NFS 3 is working so I assumed he was on an 11 version.

There was actually a patch once for 10.20 that added NFS Version 3 to it that caused me some real issues when I installed it because /net would hang and I had a binary that had /net in the library path and even though it was set to use SHLIB_PATH for shared libraries it would first try to hit /net so therefore hang. Our fix then was to back out the patch.