Update Tue Feb 10th 11:30am -- This issue is resolved.  

There is a bug in the changes we made to a part of our batch software during the downtime. The bug is affecting some users when they submit jobs to our system.

Brief interruption of services for some users


Today, May 14 2013, at 12:45PM we will be temporarily removing one of the home directory servers from service to address some reliability issues. Users with home directories under /nfs/13 will experience a brief disruption in service. Logins will likely fail, and jobs will not run for these users.

We expect this outage to last for 15-30 minutes.