[CentOS] CentOS 5.4 x86_64 only detects 32GB RAM while Fedora x86_64 correctly lists 128GB

Peter Kjellstrom cap at nsc.liu.se
Mon Dec 7 13:49:20 UTC 2009


On Monday 07 December 2009, Diederick Stoffers wrote:
> Hi,
>
> We have a new 24-core Dell PowerEdge R905 server with 128GB's RAM. The 64
> bits version of Fedora 12 lists the correct amount of 128GB, CentOS only
> finds 32GB (and so does Scientific Linux).

Hmm.. maybe this has to do with the Xen kernel. Redhat says x86_64 should do 
256G/1T (AMD/Intel) and we're successfully running 72G on Centos-5.4.

/Peter

> I would much prefer to use 
> CentOS (most of the software we use is specifically designed for CentOS).
> Does anyone know what is causing this/how to fix it?
>
> Many Thanks,
>
> Diederick
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