Hi, Zoltan -

This sounds like a DNS lookup failure to me, as though the client is attempting 
to verify some aspect of the mount.
Naturally, the programmer didn't bother including the lookup name in the error 
message, to make pursuit easier.  You may be able to deduce that based upon 
mount inspection.

    Richard Sims

On Jan 6, 2011, at 11:32 AM, Zoltan Forray/AC/VCU wrote:

> We have been updating Linux clients to 6.2.2.0 due to the recently
> reported vulnerabilities.
> 
> One client that has been backing an NFS mount just with 6.1, is now
> failing.  We get the following errors:
> 
> 01/06/2011 10:22:30 ANS3402W psGetHostName(): A system call
> gethostbyaddr() failed with code 1.
> 01/06/2011 10:22:30 ANS5250E An unexpected error was encountered.
>    TSM function name : nsGetNasVolumeInfo():
>    TSM function      : dmMapNfsVolume() failed to map remote volume for
> path: </var/echo360>.
> ...