Adprep error - Server 2000 to Server 2008r2

I am planning on adding a new server 08r2 DC into the forest soon to an existing Server 2000 SP4 environment which has 2 DC's. So i ran the adprep /forestprep utility on the main DC that has all the fsmo roles, and i got this error:
Entry DN: CN=uid,CN=Schema,CN=Configuration,DC=xxxx,DC=com
Add error on line 2: Busy
The server side error is "A database error has occurred."
An error has occurred in the program
ERROR:Import from file C:\WINNT\system\sch22.ldf failed. Error file is saved in ldif.err.22

How can i resolve this?
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Cobra25Asked:
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Cobra25Connect With a Mentor Author Commented:
No problem..
Yes you can add Server 2008 r2 into the environment, its not support as a direct upgrade so waht you have to do is extend your 2000 schema for support for the new attribues from 08 r2. This is done by running adprep on the schema master.

Btw, i fixed the issue adjusting the temp path locations.
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Mike KlineCommented:
Run adprep32 /forestprep.  adprep is for 64 bit boxes.   Since your 2000  box is x32 use that

See my screenshot from a 2008 R2 disk.  You should see both versions.

Thanks

Mike
adprep32.png
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Cobra25Author Commented:
i ran adprep32...
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PACSAdminCommented:
A direct upgrade from Windows 2000 to Windows Server 2008 R2 is not supported see below

http://www.microsoft.com/windowsserver2008/en/us/why-upgrade-2000.aspx

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Cobra25Author Commented:
this is not a direct upgrade.......
i am running adprep on my existing Server 2000 DC to prepare for an 08 r2 server i plan on adding next week.
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PACSAdminCommented:
what i mean is the domain functional level needs to be windows 2003 at a minimum
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Cobra25Author Commented:
How can it be at 2003 when i only have 2 Windows 2000 DCs???
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PACSAdminCommented:
Exactly... That is why you cant add a 2008 R2 server to a 2000 domain
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Cobra25Author Commented:
lol, thanks for the help but you are incorrect.
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PACSAdminCommented:
i was under the impression that you can with Windows 2008 but not with R2. I do stand to be corrected though and if i am wrong my apologies
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Mike KlineCommented:
Try running dcdiag and seeing if there are any errors on the DC.    So you ran it on the schema master with an account that is in the schema admins group with adprep32 that part is ok then.
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Mike KlineCommented:
Did you use the method mentioned at the end of this blog

http://msexchangeteam.com/archive/2004/02/11/71405.aspx

...just making sure
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