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Windows server 2008 R2 std shows only 24 GB while there are 32 GB installed

We've got Windows server 2008 R2 std physical rig, which shows only 24 GB while there are 32 GB installed.
I've checked and saw that 32GB are the limit for this version of windows, and we need to use all of them.

See screenshot attached.

Please assist :)

Thanks
SAP.jpg

Jayaraja Jayaraman

Windows server 2008 R2 supports only 32 gigs of RAM
http://msdn.microsoft.com/en-us/library/aa366778%28VS.85%29.aspx

ASKER CERTIFIED SOLUTION

Cliff Galiher

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dpcsit

Could part of the memory be mirrored in Bios?

IT_Group1

ASKER

dpcsit thanks - how can I check it via Windows?

Jon1999

I had it happen in a server that one of the two 4 gig sticks one was bad casing it to lose both. Replaced one bad it is working now

SOLUTION

Seth Simmons

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dpcsit

Haven't touched an IBM server for awhile but here is something on mirroring:

http://publib.boulder.ibm.com/infocenter/systemx/documentation/index.jsp?topic=/com.ibm.sysx.5466.doc/setup_utility_menu_choices.html

Cliff Galiher

I agree on the mirroring. But as far as bad memory, many servers will disable the stick during preboot (POST or UEFI) but still bubble it up to the OS. This is intentional and newer chipset drivers fully support "knowing" that the BIOS disabled memory. The idea behind it is that system management software such as SCOM can have management packs can query the is, the OS will report when memory fails, and SCOM can generate an alert for replacement. It isn't at all uncommon anymore. And it isn't limited to memory. Bad disks in a RAID array can notify the OS so you no longer need to log into an out-of-band interface or reboot. Bad power supplies (useful if you have a server with redundant supplies that can be hot swapped.) OS level reporting on hot-swappable hardware has come a long ways. And yes, windows will display those as X memory and y usable where y=x-bad.

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dpcsit

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Seth Simmons

another thing to look at...
if you run msconfig, click the boot tab and advanced options button, check if maximum memory is specified. if a user-imposed memory limit was in place for windows it would show that (32 total, 24 usable) in the system properties

IT_Group1

ASKER

Guys,

IBM have checked the server, the DIMM's are misplaced...

Thanks all

IT_Group1

ASKER

I've requested that this question be closed as follows:

Accepted answer: 0 points for IT_Group1's comment #a40498878

for the following reason:

Other solutions were good, but not correct.
Thanks all

Seth Simmons

i said earlier a possibility was a misconfiguration of modules

IT_Group1

ASKER

2 (!) modules were bad.
Thanks guys