I have a server running Ubuntu 11.04 server, no gui. Randomly it will lock up. Doesn't respond to pings. Console access is also locked up and unresponsive. I haven't been able to find anything in syslog, kernlog, or dmesg that provides any information onto why it is locking up.
CPU - Intel Xeon e5649 @ 2.53GHz
RAM - SAMSUNG 4GB 240-Pin DDR3 SDRAM DDR3 1333 ECC Unbuffered 24 Gb total Hard Drives - 2 - 2tb drives in mirror raid 5 - 3tb drives in Raid 10 with spare using software raid mdstat MOBO - SUPERMICRO MBD-X8STI-O
Let me know if you need anymore information