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Domain Controller Upgrade

Harware Specs (Current Primary Domain Controller)
-Dual Intel Xeon 2.33 processors
-4 GB of RAM
-300 GB of hard drive space
-Running Windows 2003 R2 (x86)
*Holds all FMSO roles

Hardware Specs (Backup Domain Controller)
-Dual Intel E5420 2.50 processors
-4 GB of RAM
-250 GB of hard drive space
-Running Windows 2008 R1 SP2 (x64)

Utimately, I want to get our domain onto Windows 2008 R2.
Would you suggest that I upgrade our current servers or purchase a new server to acomplish this.
Also, any pros/cons for having 1 physical domain controler and 1 virutal domain controler?

Please share your thoughts.
Thanks,
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tgarrity
Asked:
tgarrity
3 Solutions
 
uescompCommented:
As far as virtual domain controllers, make sure you sync the virtual DC's clock to a time server or the host server's clock or the time will be off and you will run into kerberos authentication issues.  Other than that, I haven't run into any problems.  There is often a VM tools program you install on the VM guest computer to accomplish this.
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Krzysztof PytkoActive Directory EngineerCommented:
I would stay with current hardware. And 1 phycical and 1 virtual DC is good idea but:

You have to remember that the ONLY one supported method of DC backups is System State Backup. You cannot use VHD backup files or snapshots to prevent USN rollback. Then eberything would be fine.

Regards,
Krzysztof
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Darius GhassemCommented:
I would go with one virtual DC and one physical as well. If you want to upgrade to R2 you need to make sure your current hardware supports 64-bit since R2 is only a 64-bit version of Windows server.
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tgarrityAuthor Commented:
Thanks!
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pcnetwiseCommented:
From what I can see, the question was not answered.
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