Re: ATA 4 KiB sector issues.

[H. Peter Anvin]

On 03/10/2010 01:14 AM, Denys Vlasenko wrote:
> 63s/255h is more or less "standard" now.
>
> Alignment issues can be solved by picking a good multiple of
> _heads_ or _cylinders_:
>
> For first partition, pick the start at 8th head:
>
> cyl 0 head 1 sector 1: LBA sector 63) - bad
> cyl 0 head 8 sector 1: LBA sector 8*63) - good (4k aligned)
>
> For any other partition, pick start cylinder which is a multiple of 8:
>
> cyl 8*x head 0 sector 1: LBA sector 8*x*255*63 - good (4k aligned)
>
> This will actually work well for *any* geometry, not only for 63s/255h.

Yes, but it does squat for a flash disk that wants, say, 256K alignment.

	-hpa
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