Re: Sector sizes in the kernel

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On Monday 26 March 2007 18:04, Erik Mouw wrote:
> On Mon, Mar 26, 2007 at 05:23:50PM +0200, Tzahi Fadida wrote:
> > On Monday 26 March 2007 16:27, burns.ethan@xxxxxxxxx wrote:
> > > On Mon, Mar 26, 2007 at 03:43:56PM +0200, Tzahi Fadida wrote:
> > > > See here for a description of a sector:
> > > > http://en.wikipedia.org/wiki/Cylinder-head-sector
> > >
> > > This article is sort of misleading.
> > >
> > > I didn't do more than skim the beginning of the first paragraph, but
> > > you may find that this is a better explanation:
> > >
> > > http://www.dewassoc.com/kbase/hard_drives/hard_disk_sector_structures.h
> > >tm
> >
> > I c. 10x!
> > However, in LDD3 they did not explain how to define a geometry with zone
> > bit recording. I.e. a geometry with different zone track groups.
>
> That's why CHS addressing has been obsoleted by LBA addressing: you
> just tell the drive "I want sector 1234567" and it will figure out by
> itself which sector on which track in which zone it is.

That is not what i meant. Without specifying the geometry of the drive, how 
the schedulers would know accurately which sector is near which and will know 
how to order them correctly. Especially same sector position on different 
platters and sides.

-- 
Regards,
        Tzahi.
--
Tzahi Fadida
Blog: http://tzahi.blogsite.org | Home Site: http://tzahi.webhop.info
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