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List:       tru64-unix-managers
Subject:    SUMMARY: nfsv3 mount not functioning
From:       "Cohen, Andy" <Andy.Cohen () cognex ! com>
Date:       2003-11-25 19:56:21
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No replies to this from the list but I found a solution.

The culprit seems to have been the MTU size of 9000 -- as soon as I set it back to \
1500 the problem cleared up.  Ironically, and mysteriously, there are 2 other NFS \
mounts to similar machines mounted on this DS20 that had no problems with this \
setting.  These are the settings in fstab:

This one didn't like the larger setting:		nfsv3 rw 0 0
This one was fine with the larger setting: 	nfsv3 rw,tcp,intr 0 0
This one was fine with the larger setting: 	nfsv3 rw,intr 0 0

So whether it was the way they were mounted or something about the remote server's \
configuration to make them behave differently I haven't been able to determine yet \
... and probably won't get to.

Thanks,
Andy



ORIGINAL QUESTIONS
==================


Sorry, I failed to mention that I also just installed a DEGPA gigabit card on the \
DS20.  I also made the following changes per tuning guides, tech support, and advice \
from this list:


fifo-do-adaptive=0
new_wire_method=0


(to increase default system socket buffer sizes)
tcp_sendspace=524288
tcp_recvspace=524288


(to increase MTU size to use jumbo frames)
ifconfig alt0 imptu 9000



Are any of these incompatible with nfsv3?

Thanks again.

Andy


ORIGINAL QUESTION
=================


Help!

We've got a DS20E running 5.1A that we just applied the latest patch kit (PK6) to.  \
There's an nfsv3 mount (to a solaris box) that doesn't seem to be functioning.  I can \
navigate to the directory that serves as the mount point and issue 'ls' ok.  However, \
if I go to a sub-directory any command I issue just hangs indefinitely and I can't \
even kill it.  Has anybody experienced this type of behavior?  Anybody have any \
suggestions for fixes?  I can't unmount because the hung command was issued while in \
the mounted file system.

Thank you!
Andy


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