boot issues with 2 CPU server
 

Hi All,

We have purchased new server with 2 CPU. When my vendor delivered server with one CPU. We did not noticed that and installed Redhat Linux 4.6, after few days we have relaized that there is no second CPU. We have contacted my vendor and they have delivered the 2 CPU. We have installed the 2 CPU and rebooted. But the server not able to reboot. When I press f2 and enter setup, it is showing 2 CPU and all the memory. But is not able to boot. Then I have removed the new CPU and booted, the server able to boot with one CPU. Later I have removed the old CPU and installed the new CPU and restarted the server. Now the server able to boot with single new CPU.

Server not able to boot with when I install 2 CPU. Can some one guide me what the issue is.

Thanks and Regards,
Ram.

Install the new processor only and see if it works.

We have tested with new processor. It is working fine with single processor.

Then your kernel is not multi-cpu enabled.

You need to enable Symmetric Multi-processing Support for your kernel.

It is located under Processor type and features in your kernel config file.

Shouldn't matter - non-SMP kernels simply use just one CPU/core.
What does this mean ?- do you get through post?
- do you see a boot menu ?
- any messages ?
- what kernel (uname -a) are you using ?.

Yes, I can see the boot menu.
There is no error messages, simply server going to shutdown.
uname -a

Linux test 2.6.9-67.ELsmp #1 SMP Wed Nov 7 13:56:44 EST 2007 x86_64
x86_64 x86_64 GNU/Linux

Thanks and Regards,
Ram.

Quick check would be to download a (64-bit) liveCD and see if that boots o.k. and sees both processors. This will have a (much) more recent kernel.
Also you can edit the boot entry for your RHEL system - highlight the entry and hit "e" to edit that entry. Do the same on the kernel line - remove the "rhgb quiet" from the line.
Hit <Enter> then "b" to boot.
This should allow you to see any messages - the change is for that boot only, it isn't permanent.