4GB ram in PE44

[Jim Hall]

You need the PAE kernel. P3 Xeons are 32bit processors and can only support max of 4GB ram. Your RAID controller is more than likely occupying address space and thus the inability for a 32bit kernel to address memory in / above that space. This is pretty typical behavior.

----- Original Message ----
From: Grzegorz Sójka <pld at pfu.pl>
To: linux-poweredge at lists.us.dell.com
Sent: Wednesday, January 30, 2008 1:40:37 PM
Subject: 4GB ram in PE44



Hi 
there.

I 
have 
a 
problem 
with 
PowerEdge 
4400 
equiped 
with 
two 
P3 
Xeon 
866Mhz
CPUs. 
I 
just 
both 
8x512MB 
PC133 
ECC-R 
and 
installed 
it 
in 
my 
server.
BIOS 
claims 
that 
there 
is 
4096MB 
RAM 
installed 
on 
the 
system 
which 
I
believe 
to 
be 
true. 
Moreover 
in
http://support.dell.com/support/edocs/systems/pe4400/en/ug/techspec.htm
we 
read 
that 
it 
supports 
up 
to 
4GB. 
Unfortunately 
both 
mpmemory 
and 
my
linux 
claim 
that 
there 
is 
only 
3.5GB 
memory 
in 
the 
system. 
In 
dmesg 
we 
read:

Linux 
version 
2.6.16.45-1smp 
(builder at aksjomat) 
(gcc 
version 
3.3.6 
(PLD
Linux)) 
#1 
SMP 
Wed 
Mar 
28 
03:22:39 
CEST 
2007
BIOS-provided 
physical 
RAM 
map:
 
BIOS-e820: 
0000000000000000 
- 
00000000000a0000 
(usable)
 
BIOS-e820: 
0000000000100000 
- 
00000000dfffe000 
(usable)
 
BIOS-e820: 
00000000dfffe000 
- 
00000000e0000000 
(reserved)
 
BIOS-e820: 
00000000fec00000 
- 
00000000fec10000 
(reserved)
 
BIOS-e820: 
00000000fee00000 
- 
00000000fee10000 
(reserved)
 
BIOS-e820: 
00000000fff80000 
- 
0000000100000000 
(reserved)
2687MB 
HIGHMEM 
available.
896MB 
LOWMEM 
available.
found 
SMP 
MP-table 
at 
000fe710
On 
node 
0 
totalpages: 
917502
  
DMA 
zone: 
4096 
pages, 
LIFO 
batch:0
  
DMA32 
zone: 
0 
pages, 
LIFO 
batch:0
  
Normal 
zone: 
225280 
pages, 
LIFO 
batch:31
  
HighMem 
zone: 
688126 
pages, 
LIFO 
batch:31

My 
question 
is 
: 
_WTF_??_ 
Is 
there 
way 
to 
force 
linux 
to 
use 
4GB? 
Should
I 
recompile 
the 
kernel 
or 
maybe 
change 
some 
option 
in 
setup 
menu??

Thanks 
in 
advance 
for 
any 
help.

Best 
regards.

-- 
  
 
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