Hi, to finish that story: The error was actually produced by a faulty motherboard. Tyan replaced it without much trouble. Be advised that MEMTEST86+ couldn't find the problem. > thanks for your immediate response. I will replace the board, but I am > wondering what the error message actually means? >> Oct 16 14:07:36 xenserver1 kernel: EDAC MC0: UE row 0, channel-a= 0 >> channel-b= 1 labels "-": NON-FATAL recoverable (Branch=0 DRAM-Bank=0 >> Buffer ID = 0 RDWR=Read RAS=0 CAS=0 NON-FATAL recoverable Err=0x2000 >> (FB-DIMM Configuration Write error on first attempt)) > I understand that the system logs an error if the configuration data > is written into the RAM-configuration. > The error happens precisely once a second. > Why the * would the kernel reprogram the RAM configuration once every > second? -- Mit freundlichen Grüßen Michael Schumacher mailto:michael.schumacher at pamas.de