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4KB Sector Imaging

Updated: 22 Jun 2010 | 4 comments
Paul Hirose's picture
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I realize this is still new, but I recently stumbled across http://anandtech.com/storage/showdoc.aspx?i=3691 and there was passing mention of having trouble with imaging software.  Obviously, I don't have any of this hardware yet, and I'm still using XP anyway and am happy w/what I have.  But eventually, will be making the switch to Win7 (probably bypassing Vista) and eventually will end up buying replacement drives (or entire systems) that might have this 4KB sector hard drive thing.

I doubt there will be any immediate need for Ghost to be able to handle this, but I hope it will be in the works for 3.x (perhaps a wishlist item addon to that thread.)  In addition, to assist those of us who might still be on XP still when these drives become commonplace, it'd be great to see some built-in Ghost module/assistance for this too.

PH

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EdT's picture
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Dec
2009
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Repost this in the Ideas forum

This suggestion should be reposted in the Ideas forum - that way other users can also vote on it.

If your issue has been solved, please use the "Mark as Solution" link on the most relevant thread.

Eugene Manko's picture
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Dec
2009
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It may also be true that

It may also be true that since solid state drivers are taking over and there might not be a need for any of this logic at all and by the time you start upgrading to Windows 7 in a year or two you'll have solid state drive that couldnt care less about sector size at all (other than to be compatible with all controllers out there). Which is an interesting issue in itself.

EdT's picture
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Dec
2009
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Not so fast

I don't see SSD taking over from magnetic storage for a while yet. Price per Gb for SSD is hugely more expensive than magnetic storage and I'm not convinced that gap will close in as little as a year or two. No doubt the likes of Intel and other major chipset manufacturers are working on designs for hard disk controllers that offer 4K sector sizes. This is really nothing new - SCSI hard disk controllers back in the early 1980's offered various sector size options which could be selected via the SCSI common command set, and sector sizes of 1K were quite typical in minicomputers of that era, despite hard disk capacities typically being in the range 40Mb to 100Mb.

If your issue has been solved, please use the "Mark as Solution" link on the most relevant thread.

Robert Chester's picture
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Dec
2009
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From the article, the drives

From the article, the drives are backwards compatible for 512 bytes per sector however they are sensitive to alignment.  You can use ghost with the switch '-align=1MB' to force the partition alignment to 1 megabyte (an even multiple of 4kB) when restoring an image.  

The align switch will ensure that the partitions are aligned at 4kb sector boundaries and hence keep the emulated sectors performing well.  Similar performance issues exist for disk stripes in RAID scenarios.

Note that Vista and Windows 7 default to 1 megabyte alignment and ghost recognizes this and uses the same alignment when restoring an image of either operating system.