When setting up a "new" Exchange Server 2003, what's the best NTFS Allocation size?

Posted on 2008-06-17
Medium Priority
Last Modified: 2008-06-18
When setting up a "new" Exchange Server 2003, what's the best NTFS Allocation size?  Large for the one big blob for the Exchange DB or small for the individual messages of e-mail?
Question by:JBSinternational
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Accepted Solution

mass2612 earned 150 total points
ID: 21808209

This is usually something that kicks off a bit of a debate. Personally I just use the default. The bigger the allocation unit size the more disk space is wasted however the performance is better with a larger allocation unit size.

I have read that OLAP SQL databases should use a 64KB allocation but we are talking about Exchange.

Exchange access the edb files in 4KB read/write operations. 4KB is the default allocation size. This is the recommended best practice for Exchange as far as I know. Therefore I would use the default 4KB allocation size for the volumes containing the edb and transaction log files.


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