[intrepid-notify] Additional maintenance downtime tomorrow

[William (Bill) E. Allcock]

All,

The ALCF support team and Myricom continue to work as hard as we can  
to resolve the issues in our Myricom switch complex.

On Monday and Tuesday we ran diagnostic tests and identified over 100  
ports that exhibit characteristics indicative of the port failures we  
have been seeing.  These failures present themselves in the network as  
excessive CRC errors and often result in file system and login  
problems until we can track them down and disable them.  We pushed  
Myricom as hard as we could to replace those ports today during our  
already extended, but pre-scheduled, maintenance window.  They  
informed us that the soonest they could be ready was tomorrow, and  
that they needed a 12 hour window to complete their work.

As a result, we will be putting a reservation in place for tomorrow  
from 8AM - 8PM.  We apologize for this additional loss of science  
time.  We are acutely aware of the fact that some of you have on-going  
time sensitive campaigns.  However, an additional 12 hours tomorrow  
will allow us to get these current problem ports out of the system,  
and, hopefully, buy us improved stability while Myricom works out root  
cause and gets us a long term solution.  Please contact support at alcf.anl.gov 
  with any questions, comments, or concerns.

Thank you for your continued patience,

The ALCF Support Team