VM not registering the extra RAM after update

Hello all,
 I am having a problem with my VM not registering extra RAM on Server 2008 R2. After a recent update and reboot, I noticed that my RAM is incorrect. I have 16G of RAM on my machine, but it only reads 12G. I understand that the PAE needs to be enabled in order for it to show on a 32 bit OS, but I have a 64 bit OS. There is 3 virtual servers allocating 4G max on each, which is 12G, but where is the other 4G? It was registering prior to the update! Help!
LVL 5
Carlisle_AgentAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

xperttechCommented:
Is this a Microsoft HyperV or a VMware server?
What version?
Is the BIOS reporting the 16Gb now?
Was it originally 12Gb and you added 4Gb to it?
0
Carlisle_AgentAuthor Commented:
It is Microsoft Hyper-V Virtualization, Microsoft Server 2008 R2 Enterprise, and is there a way to check the bios without having to reboot the server? Reason being, we have users currently connected to the machines working on it, and I would hate to hault production in order to check this. Also, it was originally 16Gb prior to the update, but is now registering 12Gb after reboot.
0
charlestasseCommented:
what update did you do
Install Open Manage server administrator managed node, this will tell you all firmware versions and will tell you if you are having hardware issues that would reduce the total memory being seen by the OS.
0
Has Powershell sent you back into the Stone Age?

If managing Active Directory using Windows Powershell® is making you feel like you stepped back in time, you are not alone.  For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why.

Carlisle_AgentAuthor Commented:
It was a recommended update by Microsoft updater. It was about 50+ updates since we are really unable to do this during business hours (which I should have made more time after hours for this). The Open Manage is not an option due to the incompatiblity with our HP hardware (which I have tried this before). But like I was saying under prior post, all was well untill the update/reboot; It was recognizing the 16Gb of RAM. /pulls hair out! I would really hate to revert back to a privious date, while I'm sure there is always a simple solution to the most complex of problems. =(
0
Carlisle_AgentAuthor Commented:
Turns out that the RAM is not registering because of a motherboard malfunction. I checked every slot with back-up RAM and found that one was burned out. I called HP and was still under warrnty, so they will replace it. Somehow, updating was not the problem?! Thank you HP for having an awesome QC fail checking procedure (/sarcasm).
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Carlisle_AgentAuthor Commented:
After a week, I have accepted my own solution. I didn't expect anyone to answer my question as promptly as they did, THANK YOU. Hardware is unlikely the solution to most IT problems, so I deemed it irrelevant in troubleshooting this brain-buster. In close, I thank those of you who responded to my question.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Windows Server 2008

From novice to tech pro — start learning today.