The WestGrid storage facility (gridstore) will be completely rebuilt: the file server (gridstore) will be upgraded from a Power4 server to a Power5 server and the operating system will be upgraded to AIX 5.3. We expect that the upgrade will take about two days. Over that period gridstore, robson, tantalus, blackhole and other WestGrid systems housed at SFU will be unavailable. All these systems will have to be rebooted in the process, thus all running jobs on robson and tantalus will be terminated on Monday morning. We expect that all systems will be available again on Wednesday 25.