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windows server 2008 64bit sp1 can upgrade to R2

Oh man. I just built 9 64 bit 2008 servers with SP1 including IP address details to do a train signal course and now i see that i need R2 version.

I haven't installed AD on them yet, anyone know if there is a quick update i can do rather than rebuild?
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Jason Thomas
Asked:
Jason Thomas
4 Solutions
 
tjc123IT DirectorCommented:
I believe you simply need to use the 2008 R2 x64 media and select Upgrade. There isn't a "patch"  as these are essentially two different operating system builds.
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albeloCommented:
There isn't an "Update" you can perform.  You can however Upgrade the Server OS using the Windows 2008 R2 media.

Here's more information on Upgrading to 2008 R2.

http://technet.microsoft.com/en-us/library/ff968983(v=ws.10).aspx
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David Johnson, CD, MVPOwnerCommented:
FYI Server 2008 is built on the Vista Core, 2008R2 is built on the Windows 7 core.
If you are using virtual machines the easiest way is to use differencing disks
create one machine as per normal, sysprep it, now take note of where the virtual hard drive is.
(do not use this machine)
create the additional machines using a differencing disk, using the original as a base, you're up and running in no time and have the advantage of using minimal disk space.
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Jason ThomasAuthor Commented:
hi, makes sense but what it a differencing disk?
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David Johnson, CD, MVPOwnerCommented:
A differencing disk is a virtual hard disk you use to isolate changes to a virtual hard disk or the guest operating system by storing them in a separate file

More detailed information @ http://technet.microsoft.com/en-us/library/cc720381%28v=ws.10%29.aspx
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Jason ThomasAuthor Commented:
Sorry for the delay in responding dudes. Help much appreciated.
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