**MAJOR CHPC DOWNTIME** July 15th 2008 from 8:00 a.m. until approximately 9:00 p.m.

Posted: July 3, 2008

Maintenance Will be performed on the coolers in the Komas data center requiring the clusters to be powered off. CHPC will also be performing system maintenance on some networking equipment. While the INSCC networks technically are not going down, because of core server changes (NIS, DNS) it may appear to users that the network in INSCC is not functional between 8-8:30 a.m. Desktops maintained by CHPC (mounting CHPC file servers) will be affected from about 8:00 a.m. until approximately 2:00 p.m. - maintenance will be performed on several service machines as well as home directory filesystems. Once the cooling maintenance is complete, CHPC will perform system maintenance on the Arches and Telluride Clusters. We expect to have the HPC systems up and scheduling jobs by approximately 9:00 p.m.

• INSCC Networks: 8:00 until 8:30 a.m.
• INSCC Desktops: 8:00 a.m. until approximately 2:00 p.m.
• HPC Clusters (Arches, Telluride): 8:00 a.m. until approximately 9:00 p.m.