The SGI ICE system will be unavailable for regular user operation between 22nd and 30th of August, 2011. This is due to an operating system and batch queueing upgrade. After this extended maintenance, the system will be run in a SLURM cell of the Linux Cluster; please consult the cluster documentation at http://www.lrz.de/services/compute/ linux-cluster/ for upcoming details on this new batch software deployed on the parallel segments of the LRZ cluster. Submission of SGE jobs to the ICE will not work anymore after the upgrade. After the upgrade, it is recommended that you perform the following measures: * recompile and relink your programs using the new sgi MPT release * modify your batch scripts to use SLURM instead of SGE This information is also available on our web server http://www.lrz-muenchen.de/services/compute/aktuell/ali4083/ Reinhold Bader