Re: IDE/ATAPI in 2.5

Eric W. Biederman (ebiederm@xmission.com)
15 Jul 2002 04:24:54 -0600


"H. Peter Anvin" <hpa@zytor.com> writes:

> Andre Hedrick wrote:
> > Nice, so you still have to strip and export to the transport layer.
> > Please expand on what you are going to talk to packetized and the associated
> > transport protocol restricted to the scope of storage.
> > Next count all the different personalitys associated with the discrete
> > transport layer.
> > If you are referring to Jens' pktcdvd interface out of block, it is no
> > more than a bypass of dealing with scsi. It would allow direct access to
> > the physical transport without portions of OS mucking up things as it does
> > now.
> >
>
> I'm talking specifically about ATAPI devices here. As we have already covered,
> not all ATA devices are ATAPI, but unless I'm completely off the wall, ATAPI is
> SCSI over IDE, and should be able to be driven as such. The lack of access to
> that interface using the established interface mechanisms just bites.

ATAPI is SCSI like C is C++. There are strong similarities but they
are regulated by different groups, and have slightly different semantics.
Last I checked cdrecord already compensates for those differences but they
are there.

Eric

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