Looking for a recommendation on which of my servers to put a secondary DC in case PDC is down.

Physical Servers:

1 x Windows Server 2008 R2 running AD, DHCP, DNS, WSUS.
2 x Windows Server 2008 R2 in a FailoverCluster as Hyper-V hosts.

Virtual Servers (3 on each host, host has capacity to take all 6 on a failover so not looking to add any more servers)

  1. Server 2003 running legacy SQL 2000 and IIS
  2. Server 2008 R2 running SQL 2008
  3. XP running a legacy app / sandbox machine
  4. Server 2008 running Exchange 2007
  5. Server 2008 R2 running IIS 7 for .net web apps
  6. Server 2008 print server and AV administrative console.
  • 3
    How about adding AD to virtual server 6 (print server and AV admin)? That seems to be the best choice from the details you give, unless there are some other factors not listed...
    – charnley
    Mar 24 '11 at 15:23
  • That was my feeling too but I was cautious about using Server 2008 over 2008 R2. Any good guides advice for adding this DC? Also, pop your comment in a question and I'll mark it as an answer.
    – PMC
    Mar 24 '11 at 15:28
  • Well you could upgrade that server to R2. But I don't know if that virtual server instance is running x64, which is required for R2.
    – charnley
    Mar 24 '11 at 15:35
  • I think it isn't R2 due to print driver issue. I'm going to follow technet.microsoft.com/en-us/library/cc753720(WS.10).aspx and give it a go.
    – PMC
    Mar 24 '11 at 15:40

Yes, that is the way I would go. Just DCPROMO that sucker and who cares if its R2. You just want another copy of the AD schema in case your main DC tanks. Your virtual server 6 looks like the perfect place to do this.

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