Issue Following messages are seen in /var/log/messages before system went down: Raw kernel: sbridge: HANDLING MCE MEMORY ERROR kernel: CPU 1: Machine Check Exception: 0 Bank 9: 8c000046000800c1 kernel: TSC 0 ADDR b41107b40 MISC 900010001000c8c PROCESSOR 0:206d7 TIME 1380047100 SOCKET 1 AP...