2010-05-03 07:43 AM
What's the correct disk alignment setting for a guest machine running Windows 2003. TR-3749 version 2 page 95 states "create partition primary align=32, but MS states that it should be 64 unless otherwise. So can someone confirm the correct alignment settings for a partition that's used in Windows 2003 (200GB+ partition). Should it be 32 or 64?
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2010-05-03 07:57 AM
did a little more digging around the net and found a post on OS disk alignment on Netapp here. per some of the comments it appears that it's up to you if you wanted to use either 32 or 64 alignments. If this is the case then what is mbralign configured to use when you run it against a vmdk file?
2010-05-03 08:02 AM
I would say that either would work just fine however lets consider the standardization of alignment for the cloud. Some vendors recommend different sizes based on their own filesystem and what is best for them. It is the opinion of many that making the starting offset 1mb as that is compatible with all storage vendors and allows for maximum portability should a migration be required from one vendor to another. MS has elected to use the 1mb offset for Window 2k8 and Windows 7 and this is a move in the right direction.
Please have a look at Vaughn Stewarts blogs which he details alignement and provides links to others documentation.
2010-11-18 02:17 PM
OK some background first.
NetApp: The logical block size of NetApp storage is: 4KB
EMC: Logical block size is 64KB
So.....In my experience,
Refer to the below document for a good understanding.