8gb memory on Redhat AS 2.1

t Tony.Delov at gribbles.com.au
Tue Oct 9 05:55:39 UTC 2007

Hi All,
Im running Redhat AS 2.1 on an IBM HS20 Blade Server.
I have just upgraded the ram to 8Gb.
The 8Gb memory shows up in the bios but the linux system only shows 4gb?

Is there any special way to get the extra memory recognized in Redhat AS

I have a server that's running Redhat ES 2.1 that has 8gb of ram.
That system has a custom kernel and is running on different hardware,
I'm wondering if that would be the reason why?

Redhat AS 2.1 

more /etc/issue
Red Hat Linux Advanced Server release 2.1AS/\m (Pensacola)

uname -a
Linux srv1 2.4.9-e.57smp #1 SMP Thu Dec 2 20:51:12 EST 2004 i686 unknown

             total       used       free     shared    buffers     cached
Mem:       3465400     433984    3031416          0     116588     230684
-/+ buffers/cache:      86712    3378688
Swap:      2048276          0    2048276

Redhat ES 2.1: 

 more /etc/issue
Red Hat Enterprise Linux ES release 2.1 (Panama)
Kernel \r on an \m

uname -a
Linux srvold 2.4.9-e.57custom #2 SMP Thu Apr 21 16:21:36 EST 2005 i686 unknown

             total       used       free     shared    buffers     cached
Mem:       8228908    8205260      23648     162336     416616    6793652
-/+ buffers/cache:     994992    7233916
Swap:      2047976      70436    1977540

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