DJ,

  One question - when you experience these problems, are you connected to the cluster from an on-campus or off-campus location?  A month or so ago, there were some issues with very slow network connections for users connecting from off-campus.

Dave

-----Original Message-----
From: Research Computing Support [mailto:[log in to unmask]] On Behalf Of Dhananjai M. Rao
Sent: Saturday, May 30, 2009 12:32 PM
To: [log in to unmask]
Subject: Unpredictable hangs during file I/O on RedHawk

Hello,

For a couple of days I have been experiencing unpredictable lock ups on
Redhawk. My suspicion is that the file system is hiccupping because even
changing directory (such as: cd ..) simply hangs forever, until I kill the
job. Once I kill a job the node seems to be OK but then again locks up after
a couple of operations. Possibly it is some specific operation that I am
doing; but I am just using the shell (not even running my own code). In any
case, I will be thankful if you could investigate this issue and help me
troubleshoot the problem.

Thanks

With regards

--
D. M. Rao
CSA Department
Miami University