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VMware VM Guest OS type displayed is wrong

Posted on 2009-12-27
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Why does vCenter Server say the "Guest OS" type for a VM is "Microsoft Windows Vista" when I have the OS type set to "Microsoft Windows Server 2008"?
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Question by:joelmerry
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by:nordtorp
ID: 26127530
This is because there were some issues installing Windows Server 2008 with those settings. Someone then changed it to Microsoft Vista as those settings work for a Windows Server 2008.

I will come up with more details when I get to my sources.
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by:joelmerry
ID: 26127539
Right, but the odd part is if I go in to "Edit Settings" for the VM, go to the Options tab, under "Guest Operating System" it says "Microsoft Windows Server 2008 (32-bit)"; however, when I look at the Summary page for the VM, under General, it says, "Guest OS: Microsoft Windows Vista (32-bit)".

Is this by design or is there something quirky going on?
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by:nordtorp
ID: 26127545
I cannot find my sources right now, but when I tried to install Windows Server 2008 I got an error on boot saying something like "unable to find C:\Windows\System32\winload.exe"

When I changed Guest OS to Windows Vista and tried to install Server 2008 it worked.
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by:nordtorp
ID: 26127564
It might be something fishy about that. You might have a look at this:

Impact of mismatch Guest OS type
http://frankdenneman.wordpress.com/2009/12/15/impact-of-mismatch-guest-os-type/

Have you installed the latest VMware tools to the server?
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by:joelmerry
ID: 26127582
I believe that was an issue with 3.x when Server 2008 first came out since Vista was out before it and full support wasn't there yet. That's not the issue in my case.
I'm wondering why, in vCenter, it's saying the OS type is Vista, when Server 2008 is what's installed and the VM options are configured as Server 2008. I manually checked the VMX file and it says Server 2008 as well.
Will create a new VM using the existing VMDKs and see if that works.
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by:ryder0707
ID: 26128138
I encountered similar problem in the past if the VM was created/imported from vmware worstation/server
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by:wrdana
ID: 26159601
What is your ESX Version, and the exact version of Win2008(SP?, R2?)?

2008 SP1 and above  is supported for esx3.5.2 and above, while the R2 Version is supported only for ESX 3.5.5 and above. that's why you might see it as Vista - the VM Doesn't Recognize the OS.
Happened to me too..
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joelmerry earned 0 total points
ID: 26165764
Not running R2 ... re-created VM's using the existing VMDK's and the display issue went away. Had tried that once before and it didn't work, but that was before vCenter U1, so maybe that was it? Crazy!!
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