Re: ATA 4 KiB sector issues.

[H. Peter Anvin]

On 03/16/2010 06:24 AM, James Bottomley wrote:
> Because the msdos label can only partition in units of cylinders.  If
> you're using an msdos label, picking the right H/S gets you alignment.

This is doubly false.

An MS-DOS partition table can partition at any boundary.  Some OSes 
(like some versions of MS-DOS) needed track alignment because their boot 
loaders did not support crossing track boundaries.

Second, the primary field in the (modern) MS-DOS partition table is an 
LBA field.  The CHS fields are largely historic and useless because of 
the 1024-cylinder limitation, and by only being 24 bits total.

	-hpa
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