NFS problem

[Tuan Nguyen]

Hi experts,

I am having a problem with NFS between 2 HPUX servers that I need your help with.

This is my setup

server 1: HP 9000 N4000 hpux-11.11 hostname:opsvr02b
server 2: HP 9000 rp4440 hpux-11.11
hostname: opsvr01b

/etc/rc.config.d/nfsconf from opsvr02b shows
NFS_CLIENT=1
NFS_SERVER=1
AUTOMOUNT=1

bdf from opsvr02b shows
opsvr01b:/testdb 563216384 495072848 67611208 88% /tmp_mnt/testdb


/etc/rc.config.d/nfsconf from opsvr01b shows
NFS_CLIENT=1
NFS_SERVER=1
AUTOMOUNT=1

exportfs from opsvr01b
/testdb -access=hpopsnew:opsvr02b

I can ftp files from, to and between these servers without any problem. However, I successfully copy a file from opsvr02b local filesystem to /mnt_tmp/testdb, but I can not copy a file from /mnt_tmp/testdb to a local filesystem. The system gives me

NFS server opsvr01b not responding still trying
NFS server oprvr01b ok
NFS server opsvr01b not responding still trying
NFS server oprvr01b ok
.
.
.

I am not sure what the problem is. Can someone direct me to a solution?
I appreciate your help. Thank you

Tuan Nguyen

[TTr · Accepted solution]

These problems are not easy to diagnose. I would start by ensuring that the latest NFS patches are installed on both servers. Then look if there are any network issues and that the network interfaces are set at the proper speed. Check if the servers are extremely busy and are doing disk swaping.

[Tuan Nguyen]

TTr,

Thank you very much for your prompt response. I appreciate your help. I have been trying so many things and hope that it would fix it. Anyway, I think I might have it fixed. Since this is the private lan between 2 servers (I used crossed over cable). I discovered that on interface has MTU=1500 and other has MTU=9000. I made them both 1500 then I was able to copy files back and forth now. I hope it will stay that way. Again, I appreciate your help.

Tuan Nguyen

[Mark Ellzey]

Hello Tuan,

How are you? Hope everything is well with you.

Saw your question and my first thought was 'network'. Any time I've seen the 'server not responding' message, it's always turned out to be network related. Usually a speed or parity mismatch on the switch port/NIC card.

Glad to see you got the problem solved.

Regards,
Mark