It is the same kernel.

            This is the standard installation nothing changed,
            but it is working fine on
            the another server! By default it should be 64bit
            kernel

     Hi there,

     You have the standard kernel? So not using the 64bit kernel? If
     so, you need PAE or 64bit kernel.

     Only option mate, too bad.

> I have two sun blade x6250 servers, one of the server
> recognized 8G memory
> and the another server can NOT recognized the 8G memory it
> just recognized
> 4G memory. I tried add mem=XG or mem=XXXXM in GRUB.conf but it
> never work at all and it showed me the following error:
>
> *Command line: ro root=/dev/VolGroup00/LogVol00 rhgb quiet mem=8G*
>
> I am not know why option mem not work under RHEL5.1!
>
> The BIOS was updated with latest version firmware and they
> bios are able
> to recognized the 8G memory in the two servers, but from OS level
> still one of the servers cannot recognized the 8G only recognized 4G. The
> kernel version on the both servers 2.6.18-53.el5.
>
> Some suggesting I found it on the Internet, to update the
kernel to
PAE
> kernel but I am thinking in this solution as the final step to
update the
> kernel.

How about verifying what kernel the box is running?
Like with uname -a

Perhaps you might want to share that information. No not the version, architecture is more important.

You will get more help if you give more information instead of bare minimalism.

--

  Jussi
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