ProLiant Servers - Netservers

4 GB on HP ProLiant DL360 G5?

 
Gron
Occasional Contributor

4 GB on HP ProLiant DL360 G5?

Our HP ProLiant DL360 G5 show just 3,25 GB of RAM in Windows (e.g. via "winver" command) while the DL360 G2 and G3 servers show 4 GB. Of course, both kinds of servers have 4 GB of RAM installed. The OS is exactly the same on each server (Windows 2003 Server SP2, 32 Bit).

Is it possible to enable the whole 4 GB of memory on the G5 models too or is this a kind of "Use 64 Bit Windows to support 4 GB of RAM" thing? Why does the G2/G3 servers show almost the full 4 GB (= 4 GB minus a little video memory) while the G5 servers don't?

Thank you!
2 REPLIES 2
todd myers
Occasional Advisor

Re: 4 GB on HP ProLiant DL360 G5?

Take a look at the advisory located
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&prodSeriesId=3239482&prodTypeId=12169&objectID=c00883105

Basically with the change in chipsets you need to be able to map above 4GB even for the exact 4GB amount. The PCI-E bus uses some memory mapping that is below the 4GB so that can not be recognized.
Gron
Occasional Contributor

Re: 4 GB on HP ProLiant DL360 G5?

Thank you for these very useful links. Does this mean that it would be sufficient to add the /PAE parameter into boot.ini in order to use the full 4 GB of RAM even with Windows 2003 Server 32 Bit Standard?

The Microsoft article isn't clear about this - they mention the /PAE switch on W2003 Standard solely for supporting Data Execution Prevention (DEP) and not for using the full 4 GB of RAM for Windows.

The HP arcticle states: "Microsoft Windows Server 2003 Standard Edition does not support accessing memory above 4 GB, even though PAE can be enabled. This is a limitation of the OS, and the memory space utilized by the PCI Hole and PCI Extended Configuration Space will not be available if the system has 4 GB of memory installed."

Is there anyone out there who uses this switch on a DL360 G5 equipped with 4 GB of RAM who sees (almost) 4 GB of RAM in Windows?