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Windows Server 2008 R2 Thread, AD replication shafted! in Technical; Originally Posted by sparkeh Can you clarify this? Are you saying you were told never to virtualise a DC? Thats ...
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    Quote Originally Posted by sparkeh View Post
    Can you clarify this? Are you saying you were told never to virtualise a DC?
    Thats right.

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    Quote Originally Posted by sparkeh View Post
    Can you clarify this? Are you saying you were told never to virtualise a DC?
    You can virtualise a DC 100% though always have a physical DC, dpm 2012 will actually allow you to snapshot a DC though not sure how this will work

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    Quote Originally Posted by irsprint84 View Post
    You can virtualise a DC 100% though always have a physical DC, dpm 2012 will actually allow you to snapshot a DC though not sure how this will work
    at a guess it will replace the domain info from the snapshot with current info from a n other dc before it finishes restoring the snapshot

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    Quote Originally Posted by HallX View Post
    Thats right.
    Ok well that's not MS advice at all. MS actively promoted the benefits of virtualising, the advice is to retain one hardware DC.

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    Quote Originally Posted by HallX View Post
    Thats right.
    Are you sure they didn't mean perform a P2V conversion an existing DC?

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    Quote Originally Posted by m25man View Post
    Does this not underpin the argument about maintaining a dedicated hardware server for the sole purpose of maintaining the AD?
    No, it underpins the argument that you should RTFM before messing with live systems.

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    Quote Originally Posted by K.C.Leblanc View Post
    Are you sure they didn't mean perform a P2V conversion an existing DC?
    Nothing wrong with that either, in fact there are MS tools to do this.

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    Quote Originally Posted by sparkeh View Post
    Nothing wrong with that either, in fact there are MS tools to do this.
    Its redundant anyway might as well bring upa new DC and move roles over I wouldnt try and P2V a DC

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    Quote Originally Posted by irsprint84 View Post
    Its redundant anyway might as well bring upa new DC and move roles over I wouldnt try and P2V a DC
    Depends, when my single DC site server was failing and couldn't be fixed, P2Ving it onto a new VM host was a Godsend.

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    Quote Originally Posted by sparkeh View Post
    Depends, when my single DC site server was failing and couldn't be fixed, P2Ving it onto a new VM host was a Godsend.
    ok I ll let you off

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    Quote Originally Posted by irsprint84 View Post
    ok I ll let you off
    Hehe, but yes in principle I agree that usually I would build a new DC and transfer roles

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    Quote Originally Posted by sparkeh View Post
    Ok well that's not MS advice at all. MS actively promoted the benefits of virtualising, the advice is to retain one hardware DC.
    OK. I'll not waste money on any more courses :-)

    Quote Originally Posted by K.C.Leblanc View Post
    Are you sure they didn't mean perform a P2V conversion an existing DC?
    No, I meant what I wrote.

    Don't shoot the messenger.

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    Hi all,

    OK I can't do that as it won't let me demote DC2 because it can't see another DC to disconnect through.

    Will Plan B work as follows?:

    Create a DC3 and synch it with DC2 (this is the older AD, but it is only a couple of weeks out), then demote DC1 after moving it's roles over to DC3 (whilst DC1 is the latest version, I can live with 2 weeks worth of losses from AD).

    Can anybody think of a reason this wouldn't work?

    Thanks

    Manick

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    The only reason to keep a physical DC is to avoid the single point of failure of a software bug in the virtualisation software. You could just as easily maintain a DC VM using different virtualisation software as an emergency, there is no benefit in it being a physical rather than virtual server. There used to be timing problems and all sorts in earlier versions of virtualisation software, which is why they recommended keeping a physical DC and definitely not do a P2V of a DC as the software wasn't designed for it. Nowdays that isn't the case.

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    Quote Originally Posted by manick View Post
    Hi all,

    OK I can't do that as it won't let me demote DC2 because it can't see another DC to disconnect through.

    Will Plan B work as follows?:

    Create a DC3 and synch it with DC2 (this is the older AD, but it is only a couple of weeks out), then demote DC1 after moving it's roles over to DC3 (whilst DC1 is the latest version, I can live with 2 weeks worth of losses from AD).

    Can anybody think of a reason this wouldn't work?

    Thanks

    Manick
    things I m thinking of but might nto be correct as never done before:

    *DNS issues, computers etc.. you conneted in period
    *Exchange Server/ Sharepoint issues?
    *Where are you FMSO roles?
    *You wont need to remove old DC with NTUTILS (I know spelt wrong) - Delete Failed DCs from Active Directory

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