  | | | re: SEL 10 - Kernel 2.6.16.27.0.9 locks up | re: SEL 10 - Kernel 2.6.16.27.0.9 locks up 2007-04-30 - By Peter Santos
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Folks, I'm trying to find out how to go about investigating an issue where our test server running 10.2.0.3 (x86_64) is locking up when we run a few dd commands sequentially (dd if=/dev/zero of=/z0/test/testthere2 bs=4k count=5000000) .. where /z0 was just some local storage.
He did a kernel upgrade to version 2.6.16.27.0.9 a couple of weeks ago. We then installed the following ASM packages on top of that.
oracleasmlib-2 (See http://lib-2.ora-code.com).0.2-1.x86_64.rpm oracleasm-support-2 (See http://ort-2.ora-code.com).0.3-1.x86_64.rpm oracleasm-2 (See http://asm-2.ora-code.com).6.16.27-0.9-smp-2 (See http://smp-2.ora-code.com).0.3-1.x86_64.rpm
We are using SEL 10 + 10.2.0.3 + ASM via ASMLib.
At random intervals the machine would crash with no information in the /var /log/messages. We ran a memory test on it and it was fine. Finally our SA recompiled the latest kernel from source ( 2.6.21-smp) and after a number of "dd" tests ,the machine did NOT crash. With the latest kernel from source, ASM was not started because of version mismatch!
ASM may or may not be the problem, but what is the best way to troubleshoot this?
The machine has the following spec: - Dell 6800 with 4 dual core CPUs (Intel(R) Xeon(TM) CPU 2.60GHz ) - Storage is DS4400 - Storage Driver: Fibre Channel: QLogic Corp. QLA2312 Fibre Channel Adapter (rev 02)
- -peter
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