Do we still need ATA disk CHS addressing?

Ed Schouten ed at
Sun Aug 9 13:47:26 UTC 2009

* Takahashi Yoshihiro <nyan at> wrote:
> In article <4A7DF076.4070203 at>
> Alexander Motin <mav at> writes:
> > While preparing wrapping ATA(4) low-level drivers code into CAM SIM, I
> > would like to remove CHS addressing support to make code cleaner. CHS
> > addressing is officially declared obsoleted and replaced by LBA. Since
> > ATA/ATAPI-6 specification (October 2001) it is even no longer
> > documented.
> > 
> > Have anybody seen ATA drive without LBA support in last years?
> > Any other objections against removing it?
> PC98 uses CHS addressing because the internal interface works for very
> old HDD only, so I hope it remains if possible.  But if you need a lot
> of works for CHS support, I agree to remove it.

Wouldn't it be possible to keep the old ATA code in the tree for users
who want to use stuff like this?

 Ed Schouten <ed at>
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