Dear users of the HPC systems at LRZ, As part of its continuing efforts to provide ever increasing reliable and fast storage capacity to its HPC users, LRZ has installed new network attached storage devices which will be taken into user operation in early November. Changing over to this new storage area, which will comprise all HPC user's home directories, necessitates an interruption of operation on all HPC systems. For 1. all systems in the Linux Cluster, 2. the supzero migration system, 3. HLRB-II, user operation will be suspended on Friday, October 28 at 10:00 am. It is expected that most systems will go online again in the afternoon of November 2, 2010. The following exceptions should be noted: * HLRB-II is completely retired from user operation since it has reached the end of its lifetime. All HLRB-II users must henceforth process their jobs on supzero.lrz.de. See also http://www.lrz.de/ services/compute/hlrb/aktuell/ali4107/ for further details. * the new MEGWare MPP cluster will undergo a prolonged maintenance because it is intended to move the system into a different computer room which can provide the advanced cooling technology for which the system has been designed in order to achieve optimal energy efficiency. Therefore, the MPP system will be unavailable between October 26, 10:00 am and November 11. Important Note: After the maintenance, the path name for your HOME directory will be changed to start with /home/hpc. If batch (or other) scripts do not reference the home directory via the $HOME environment variable they will need appropriate changes. This name change also may cause queued jobs to fail if they are started after the maintenance. This information is also available on our web server http://www.lrz-muenchen.de/services/compute/aktuell/ali4127/ Reinhold Bader