The UPS servicing the general-purpose research servers gaia.cc.gatech.edu and gaia3.cc.gatech.edu needs to be replaced. TSO will replace this UPS between 4:00 PM and 5:00 PM on Monday, May 4, 2009. During this time, gaia and gaia3 will be offline. The other general-purpose research server, gaia2.cc.gatech.edu, will remain available for use during this maintenance window.