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ragedemon
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Regarding disk alignment of SOFTWARE raid arrays...

Hi Fellas, I wonder if someone would be kind enough to help me,

I was assured that windows 7 x64 wouldn't suffer from this issue, but it does.

When using SOFTWARE RAID, the offset is still set to  32256. Single disks and hardware raid arrays (which are presented to windows as single disks) are fine at offsets set to 1048576.

I have 8 SCSI drives in RAID0 which I use as scratch space. 32256 shows up on every one of these drives.

Is there a way to force windows disk manager to use an offset of 1048576 when making striped arrays using dynamic disks?

Does it even matter? If single disks don't degrade in performance with a 32256 offset, then a software array might work differently and might not be affected either?

I would very much appreciate any insight into this issue.

Warm Regards,
-- Zash
Cambridge
England.



Edited By:  ragedemon
Nov-20-09 06:40:27

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thirt
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Re: Regarding disk alignment of SOFTWARE raid arrays...

Hi Zash,

Check out: http://www.tcpdump.com/kb/os/windows/di … /into.html  It probably doesn't address all your questions, but might at least be a start.  The article is on Server 2003, but diskpart is still available in Windows 7 which should allow you to create your aligned drive. 

I'm really surprised to hear the Disk Manager in 7 still messes this up. 

*Disappointed*
-Tom


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