Hi Everyone,

The past couple of days we're had a strange problem with one of our TSM 
instances (v6.2.5).  At times it appears to hang.

Last night (and the previous night) it had many servers that got a dozen or 
more sessions.  This is really strange!  This morning as I was looking at this, 
cmds like "q vol" and "q stgpool" hang - no response!  Commands like "q node" 
and "q proc" work.  The server was doing very little I/O.  All of a sudden the 
hung cmds all ran through and the server I/O jumped to 200-400MB/s.  Something 
was locking I/O.  I think the many sessions are clients that retry because the 
server is not responding.

In the TSM actlog there are no unusual messages about the time it un-stuck.  
The only strange entry in the actlog is a ANR9999D with lockwait error early 
the previous evening.    There are no AIX errors.

Any thought?

Rick






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