>This message usually means that NFS server and client do not agree on
>the version of NFS offered, however this might not be the cause of your
>problems.

>So, could you login as root to the RHEL3 boxes and do an:

>rpcinfo -p server  (server=resolvable name of your RHEL5).

>and provide the output?

Sure. Here it is:

  program vers proto  port
  100000   2  tcp   111 portmapper
  100000   2  udp   111 portmapper
  100024   1  udp   662 status
  100024   1  tcp   662 status
  100011   1  udp   875 rquotad
  100011   2  udp   875 rquotad
  100011   1  tcp   875 rquotad
  100011   2  tcp   875 rquotad
  100003   2  udp  2049 nfs
  100003   3  udp  2049 nfs
  100003   4  udp  2049 nfs
  100021   1  udp 32769 nlockmgr
  100021   3  udp 32769 nlockmgr
  100021   4  udp 32769 nlockmgr
  100021   1  tcp 32803 nlockmgr
  100021   3  tcp 32803 nlockmgr
  100021   4  tcp 32803 nlockmgr
  100003   2  tcp  2049 nfs
  100003   3  tcp  2049 nfs
  100003   4  tcp  2049 nfs
  100005   1  udp   892 mountd
  100005   1  tcp   892 mountd
  100005   2  udp   892 mountd
  100005   2  tcp   892 mountd
  100005   3  udp   892 mountd
  100005   3  tcp   892 mountd


>Also, what are the mount options you use on the /etc/fstab file (or
>automount config) on the RHEL3 side to mount the home dirs from RHEL5?

On the RHEL 3 side, I have in /etc/fstab:

sapphire:/home       /home       nfs   rw     0 0

>Do the NFS imported partitions show up in df, does it hang, display the
>partitions as mounted but with no util info?...

Doing a df shows the partitions. Everything looks fine:

Filesystem       1K-blocks    Used Available Use% Mounted on
/dev/sda2        151739168 96917132 47114052 68% /
/dev/sda1           46636   34217   10011 78% /boot
none             509440      0   509440  0% /dev/shm
sapphire:/products   10321216  8222048  1574944 84% /products
scifs:/users      209715200 138025344 67381216 68% /users
scifs:/databases   129653504 103550880 24471296 81% /databases
/dev/ramdisk         7931     13    7918  1% /mnt/ramdisk
sapphire:/home     30472192 21363488  7536192 74% /home

scifs is another machine (SunOS) who isn't affected in anyway.

It definately has something to do with the nfs version being used. If I
explicitly change the entry in /etc/fstab to:

sapphire:/home       /home       nfs   rw,vers=2    0 0

the input/output error goes away. Could it be a patch to nfs in RHEL 5
changed something to cause this?

Ryan

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