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?