Dear users of SuperMIG as well as the Cluster systems, in its ongoing effort to increase the storage capacity and performance on its HPC systems (and especially the new Petascale system that is being prepared for user operation), LRZ has taken new NAS systems into operation. Presently, LRZ is transferring the data on all HOME directories to the new system. In order to take the final step in switching over regular operations, an interruption of services on all HPC systems is necessary. Therefore, on June 18 between 8:00 am and 3:00 pm no user operation will be possible on the Linux Cluster as well as the SuperMIG migration system. Since a reboot of all systems is needed, running jobs will be removed and may require a resubmission. This information is also available on our web server http://www.lrz-muenchen.de/services/compute/aktuell/ali4319/ Reinhold Bader