Can you corrupt backups and DBs using HDD file defrag on a server that is a Domain Controller?

I have a colleague who asserts "You can corrupt backups and databases (exchange mail and active directory) by using the Windows defrag program on a server that is a domain controller".  Is this true?
tjankeAsked:
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Again, Defrag will not defrag files in use and files it recognizes as system files.

Databases are in use.  
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Lee W, MVPTechnology and Business Process AdvisorCommented:
No.  I've done it frequently.  Defrag will not defrag files in use and files it recognizes as system files.
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Actually, the opposite is probably true... Defrag helps to keep a disk healthy and files in order... regarding databases, defraging a SQL or Exchange database is not only healthy it's necessary in order to keep them running properly.

Here's the technical reference:  http://www.microsoft.com/technet/prodtechnol/windowsserver2003/library/TechRef/2873a449-e185-42cc-b34a-91eacac3fe36.mspx


Jeff
TechSoEasy
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tjankeAuthor Commented:
I'm not talking about using the database-defrag tools, like eseutil, but the file-system defrag found in Administrative Tools/Computer Management.  Thanx!
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Lee W, MVPTechnology and Business Process AdvisorCommented:
I'm not either.  I'm talking about a regular defrag - as I said:
Defrag will not defrag files in use and files it recognizes as system files.
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tjankeAuthor Commented:
Also, my colleague's concern revolves around the server also being a Domain Controller.  The main thrust of his concern is: Domain Controller + DBs + file-system defrag = corruption.
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sirbountyCommented:
Strength in numbers I suppose.  I agree with leew.
I've been a server admin for many years - and have never had a problem with the native defrag - DC or not...
The only 'down-side' would be if run too frequently (daily, for example).  Excessive wear and tear on the drive(s)...
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tjankeAuthor Commented:
Excellent - I suspected as much, but wanted others' opinions before I 'discuss' this with my colleague.  Points to all, esp. leew.  Thanks, guys!
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Although you've already closed this... just want to reitterate that I wasn't primarily referring to database defrag tools (although I was inferring that those are a good thing as well).  I would ask your colleague where he got his info... and ask HIM to give an example... cuz I've never seen it and would be very interested if that were the case (not really).

:-)

Jeff
TechSoEasy
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