[CentOS] OS does not see all my RAM

Mon Oct 3 16:13:20 UTC 2005
Bill Baird <Bill.Baird at phoenixmi.com>

> -----Original Message-----
> From: centos-bounces at centos.org 
> [mailto:centos-bounces at centos.org] On Behalf Of Robin Mordasiewicz
> Sent: Monday, October 03, 2005 10:34 AM
> To: CentOS mailing list
> Subject: [CentOS] OS does not see all my RAM
> 
> My BIOS shows all my RAM, but when I boot up linux it does 
> not see all the RAM
> 
> I have two one GIG sticks of RAM, which show up in my bios, 
> but when typing free, I see that it only shows 256Megs.
> 
> Is there a way to specify the amount of RAM if linux cannot 
> detect this, or how can I fix/tweak the OS to recognize the 
> amount of RAM
> 
> my OS is centos-4-x86_64 on a DELL 1850
> 
> [root at smtcorav02 ~ ]# free
>               total       used       free     shared    
> buffers     cached
> Mem:        251360     220136      31224          0       
> 3932      64748
> -/+ buffers/cache:     151456      99904
> Swap:       524280          0     524280
> 
> 
>
> Make sure "System Install Mode"(or something close to that) 
> is not enabled in the bios.  If it is enabled, it will limit 
> the system to 256MB of ram for compatibility of some OS 
> installations. 
> 
> 

(this is a Dell specific thing)

--Bill