Compaq ProLiant 6400R dram above 4Gb [was Re: Intel SR1500AL doesn't see 4 GB]

[Lanny Baron]

Hi,
If you install FreeBSD 6.2-AMD/64 you will be able to use all available 
memory.
Regards,
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Lanny Baron
FreeBSD Systems
High Performance Servers and RAID Systems

Toll Free: 1.877.963.1900
http://www.freebsdsystems.com
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jonathan michaels wrote:
> On Sat, Sep 01, 2007 at 12:02:55PM +0200, Bernd Walter wrote:
>> On Fri, Aug 31, 2007 at 10:31:44PM +0500, Rihad wrote:
> 
>>> I'm attempting to install FreeBSD 6.2 on Intel Server System SR1500AL 
>>> with 4 gigs ram and CPU: Intel(R) Xeon(R) CPU            5130  @ 2.00GHz 
>>> (2002.99-MHz 686-class CPU). The install goes OK, but FreeBSD doesn't 
>>> recognize that there's 4 gigs of ram unless I rebuild the kernel with 
>>> PAE enabled; it sees only ~2.5 gb otherwise. And there's a suspicious 
>>> white line emmited during boot: like "1.5 gigs above 4 were ignored". 
>>> What's up with that? As I'm new to high-end hardware, am I using the 
>>> right FreeBSD build of i386? Why can't it see 4 gigs without PAE?
>> You only have 4g physical address space without PAE and your board takes
>> 1.5G for memory mapping and such, so you only have 2.5G for RAM.
>> Most boards just claim 0.5G, but 1.5G is not that unusual.
>> Either use PAE, install amd64 if your CPU is 64bit capable or live with
>> just 2.5G.
> 
> I am in a similar position, except I recently upgraded my server (Compaq
> ProLiant 6400R) by adding two more Xeon 500/100 Mhz L2 1 Mb and added 4 Gb
> dram to the original 1512 Mb .. now I am in the same sort of position
> with FreeBSD telling me that it will be ignoring the top 1512 Mb or
> there abouts
> 
>> There is no other option, since this is a hardware limitation.
> 
> My Xeons are the 32 bit versions so I suppose that in my case I get to
> use PAE ?? or do I loose the "top" 1512 Mb, or does my machine loose
> that memory completely and I would be better moving it to another
> machine ??
> 
> thanks in advance
> 
> most kind regards
> 
> jonathan
>