[THIN] Re: HP G4 Servers
- From: Euan Cooper <Euan.Cooper@xxxxxxxxxxxx>
- To: "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
- Date: Mon, 23 May 2005 10:43:03 +1200
I think you need to re-read the url Malcolm provided ....
"To utilize the System memory that is normally reserved for the Intel
chipset and other PCI devices accessible to the operating system when
exactly 4 GB of memory is installed, updated System ROMs have been released
that will remap the 512 MB lost to PCI memory above 4 GB. Upgrade the System
ROM in the ProLiant DL360 G4, ProLiant DL380 G4, ProLiant ML350 G4 or
ProLiant ML370 G4 server to a version dated later than 8/26/2004, or the
ProLiant BL20p G3 server to a version dated later than 11/11/04.
32-bit versions of the Microsoft Windows operating systems require enabling
PAE to access memory above 4 GB. Enabling PAE mode results in a very slight
performance penalty. This potential performance penalty is normal behavior
for 32-bit operating systems that support the PAE 36-bit physical addressing
mode to access memory above 4 GB because processes running in these
environments have 32-bit pointers and the operating system must manage and
translate physical memory addresses above 4 GB so that the applications can
use it. The application support model being used in these operating system
environments determine whether enabling PAE mode to gain access to the 512
MB memory that is lost wil provide a performance benefit."
-----Original Message-----
From: Foote, Eric [mailto:EFoote@xxxxxxx]
Sent: Saturday, 21 May 2005 6:54 a.m.
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: HP G4 Servers
Or just update your ROM code and you will be all set
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]On Behalf
Of Joe Shonk
Sent: Friday, May 20, 2005 11:52 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: HP G4 Servers
At this point, it's almost better to let the memory loss slide... I think
you'll do more damage using the /PAE and the only thing you'll get in return
is the system showing that you have more memory. Unless you applications
have been written to support AWE32 extension then the only thing that
Windows can use that memory for is for cache. Take that in consideration
that the /PAE comes with a performance penalty and it require some kernel
mode memory for the memory map.
Joe
_____
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of BRUTON, Malcolm, FM
Sent: Friday, May 20, 2005 8:06 AM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: HP G4 Servers
I've found out that if you have advanced server which is what we use anyway
you can use the /PAE switch and bingo all your memory magically reappears.
I agree, it does seem like a bad design or more explicitly a bad Intel
chipset. The G3's didn't suffer from this. Thinks I will be using the /PAE
for new G4's.
Malcolm
_____
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Joe Shonk
Sent: 20 May 2005 14:57
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: HP G4 Servers
Hello,
It's called bad design... So HP only loses ½ gig? With the IBM HS20
blades, you only get 3.1 gigs out of the 4 installed.
Joe
_____
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of BRUTON, Malcolm, FM
Sent: Friday, May 20, 2005 4:39 AM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] HP G4 Servers
All
Came across a strange thing with some new HP G4 Servers
Basically you stick 4gig of memory in them and after you install an OS you
can only see 3.5GB of memory
A hardware report shows that 4 gig is installed and you see it count to 4
gig when it boots
Turns out that to get your full amount of memory you need to have the /PAE
switch set in your boot.ini to see all 4 GB form within the OS. (which of
course means you need windows 2000 advanced or higher to work !!!)
Given the discussions regarding the /PAE switch in this forum what do people
think?. Ignore that fact that you have lost ½ gig of memory or use the /PAE
switch. Feeling a bit ripped as this did not happen with the G3's
The HP explanation is here....
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=PSD_E
L041214_CW01
<http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=PSD_
EL041214_CW01>
Malcolm
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