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Date: Fri, 12 Jul 2002 21:06:12 +0200 (MET DST)
From: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
To: "H. Peter Anvin" <hpa@zytor.com>
cc: Linus Torvalds <torvalds@transmeta.com>,
       Martin Dalecki <dalecki@evision-ventures.com>,
       <linux-kernel@vger.kernel.org>
Subject: Re: IDE/ATAPI in 2.5
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On Fri, 12 Jul 2002, H. Peter Anvin wrote:

> Linus Torvalds wrote:
> >
> > On Fri, 12 Jul 2002, Martin Dalecki wrote:
> >
> >>So Linus what's your opinnion please?
> >
> >
> > I will violently oppose anything that implies that the IDE layer uses the
> > SCSI layer normally.  No way, Jose. I'm all for scrapping, but the thing
> > that should be scrapped is ide-scsi.
> >
> > The higher layers already have much of what the SCSI layer does, and the
> > SCSI layer itself is slowly moving in that direction.
>
> Then *please* make a *compatible* interface available to user space.
> This certainly can be done; the parallel port IDE interface stuff had
> exactly such an interface (/dev/pg*) -- we could have a /dev/hg*
> interface presumably.  That is an acceptable solution.
>
> Note again that this discussion (and it's a discussion, not a voting
> session -- technical pros and cons is what applies) apply to ATAPI (SCSI
> over IDE) only.  Alan has already brought up the fact of non-hard disk

Please stop calling ATAPI as SCSI over IDE, it is not. It is Packet
Interface over ATA (IDE). Some ATAPI/SCSI devices are functionally
equivalent because they support the same command set (i.e. MMC).

> non-ATAPI devices, and IMO those devices are explicitly out of scope.
> Maturity of drivers is another, but right now we're suffering through
> having to deal with multiple drivers for the same hardware, or with user

Where multiple means two? ;-)

> space having to choose different interfaces depending on connection
> interface, and either which way that's pretty pathetic.

It is in fact. Generic higher level interface is a solution.

Greets
--
Bartlomiej

>
> 	-hpa


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