RE: Disk Alignment
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RE: Disk Alignment         

Group: microsoft.public.sqlserver.setup · Group Profile
Author: John Barr
Date: Sep 10, 2008 05:41

1024? I don't understand what 1024 is. And where in SQL Server BPA does it
tell you if your disks are aligned?

"Platypus" wrote:
> Why not just do what (apparently Vista / Longhorn do) and use an offest of
> 1024.
>
> Otherwise I think the latest version of the SQL 2005 BPA actually tells you
> if your partitions aren't aligned.
>
> Surely, this is better than all this math...
>
> HTH
>
> "John Barr" wrote:
>
>> I recently read some information regarding aligning the Disk for use with SQL
>> Server. Meaning, since SQL Server handles data in chunks of 64KB that the
>> disk drive SQL Server writes to should be configured to work in 64KB chunks.
>> The articles I am referring to are listed below, and I am wondering what
>> other peoples thoughts are. I am also interested in understanding how to
>> determine whether my disks are aligned and/or how to align them. Based on the
>> articles, I see my Offset is 32KB on my drives, but I am also trying to work
>> with the formula in the Microsoft KB article to determine how/where exactly I
>> become aligned. The formula is:
>>
>> ((Partition offset) * (Disk sector size)) / (Stripe unit size)
>>
>> How do I determine these values???
>>
>> Here is the Microsoft article.
>>
>> http://support.microsoft.com/kb/929491
>>
>> Here is the other article.
>>
>> http://itknowledgeexchange.techtarget.com/sql-server/how-much-performance-are-you.../#comments
>>
>> Thanks in advance for your help.
>>
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