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  • Removing HT/CAS server from cluster

    I have a crippled HT/CAS server in my Exchange 2007 cluster that needs removed. I'm in the process of migrating to Exchange 2010 and don't see the need to build another server. Our Exchange cluster is very fragile from several power outages and I want to make sure I'm dotting my I and crossing my T.

    The question I have is it better to remove the server by running Exchange setup and completely removing/uninstalling Exchange from the server and then physically powering down the server or should I remove the roles in EMC? There is an ISA 2006 box on the perimeter as well.

  • #2
    Re: Removing HT/CAS server from cluster

    What's crippled on it? Are there any other HT and/or CAS servers in the envrionment? Need more info for this really.

    It is always best to gracefully remove software whenever possible but asking the question makes me think you don't believe it would work?
    cheers
    Andy

    Please read this before you post:


    Quis custodiet ipsos custodes?

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    • #3
      Re: Removing HT/CAS server from cluster

      The only supported method to remove a server is to use Add/Remove programs. Therefore you will have to remove the server from the cluster and then do that.

      You cannot remove the roles from EMC, and there is no other supported method to remove the server.

      If the server has failed, then a DR install is going to be your best option. Reset the computer account (DO NOT DELETE), then install Windows with the same name, add to the domain, install Exchange - the same service pack version as was installed before, from the command line using the /recoverserver switch. Once the install has completed, remove it using add/remove programs.

      You will find instructions on the Internet on manual removal, but those are not supported by Microsoft and may not be complete.

      Simon.
      --
      Simon Butler
      Exchange MVP

      Blog: http://blog.sembee.co.uk/
      More Exchange Content: http://exchange.sembee.info/
      Exchange Resources List: http://exbpa.com/
      In the UK? Hire me: http://www.sembee.co.uk/

      Sembee is a registered trademark, used here with permission.

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      • #4
        Re: Removing HT/CAS server from cluster

        yes, our Exchange environment is a CCR cluster with two HT/CAS servers. Living in Tornado Alley and having an inadequate UPS isn't a good mix. Over time our data center has been shut down hard several times. There other servers that are also showing signs of being dinged. But, at this point it's easier to remove it rather than try to repair it. I've been running on one box for months now anyway.

        As to the box itself, it is running and functional. Exchange is just dinged beyond hope. For example, I can't open EMC or EMS. As for uninstalling Exchange, I would say yes it could be done that way and since that would also remove any reference to the box in AD I would prefer that. But, since the server is so unstable I've got to prepare for it to puke all over the place.

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        • #5
          Re: Removing HT/CAS server from cluster

          Thanks, Sembee. As I mentioned in my first reply, our UPS is woefully inadequate and our servers have been shut down hard too many times. Since we're a non-profit private school money is tighter than bark on a tree so not much hope there.

          But, I hadn't thought of doing a DR install. That wouldn't be all that time consuming and would actually put the server back online. HHmm...now you have me thinking.

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          • #6
            Re: Removing HT/CAS server from cluster

            I would suggest trying to remove Exchange from the existing installation first. Only look at the DR method if that fails. Of course DR means the original server has to be removed completely and wiped, so not really an option if you have anything else on it.

            Simon.
            --
            Simon Butler
            Exchange MVP

            Blog: http://blog.sembee.co.uk/
            More Exchange Content: http://exchange.sembee.info/
            Exchange Resources List: http://exbpa.com/
            In the UK? Hire me: http://www.sembee.co.uk/

            Sembee is a registered trademark, used here with permission.

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            • #7
              Re: Removing HT/CAS server from cluster

              Wiping wouldn't hurt, there's nothing else on the box. All in all, it makes more sense to remove the server from the cluster than try to bring it back. Thanks for the insight.

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              • #8
                Re: Removing HT/CAS server from cluster

                Please read Sembee's posts above -- do NOT wipe the computer
                You MUST uninstall Exchange gracefully or it will leave AD in a mess
                Tom Jones
                MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
                PhD, MSc, FIAP, MIITT
                IT Trainer / Consultant
                Ossian Ltd
                Scotland

                ** Remember to give credit where credit is due and leave reputation points where appropriate **

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                • #9
                  Re: Removing HT/CAS server from cluster

                  You can wipe the computer BUT you have to leave the computer account alone, build a replacement server with the same name and add it to the domain (After resetting the Computer account) and then do a DR installation of Exchange so that you can remove it gracefully.

                  However I would only go down that path if the regular add/remove process doesn't work.

                  Simon.
                  --
                  Simon Butler
                  Exchange MVP

                  Blog: http://blog.sembee.co.uk/
                  More Exchange Content: http://exchange.sembee.info/
                  Exchange Resources List: http://exbpa.com/
                  In the UK? Hire me: http://www.sembee.co.uk/

                  Sembee is a registered trademark, used here with permission.

                  Comment

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