Upgrade 2003 to 2008 – not complete – is this OK?

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    Hi all,
    I tried to upgrade from 2003 to 2008 and ran into an issue. What I did:

    • setup two 2008 servers (dc3 & dc4) – ran updates, stressed tested them etc. Have had them up and running for about 6 weeks without issue.
    • ran adrep successfully
    • added dc3 to the domain
    • promoted dc3 – dcpromo = all is well
    • at this point I now have two older 2003 DCs and the new 2008 DC3.

    At this point I restarted dc4 after running updates and got a “memory parity error.” Basically I am now troubleshooting DC3 for a bad DIMM (or DIMMs).

    So here’s my question – is there any harm in leaving the domain in this “half state.” I have NOT demoted the 2003 DCs yet – and I do not run a domain unless I have at least two fully functioning DCs…

    Tonight I am going to run a full memtest on DC3 and when completed successfully will promote it – then demote the old 2003 DCs.

    Any help on this is greatly appreciated,

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