Date: Wed, 25 Jan 2006 19:17:36 +0100
From: Jens Axboe <axboe@suse.de>
To: Joerg Schilling <schilling@fokus.fraunhofer.de>
Cc: mrmacman_g4@mac.com, matthias.andree@gmx.de, rlrevell@joe-job.com,
       linux-kernel@vger.kernel.org, acahalan@gmail.com
Subject: Re: CD writing in future Linux (stirring up a hornets' nest)
Message-ID: <20060125181736.GX4212@suse.de>
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On Wed, Jan 25 2006, Joerg Schilling wrote:
> > So I'll repeat my question: is there anything that SG_IO to /dev/hd* (via
> > ide-cd) cannot do that it can do via /dev/sg*? Device enumeration doesn't count.
> 
> But device enumeration is the central point when implementing
> -scanbus.

And that's why I state it's useless on Linux.

> Note that all OS that I am aware of internally use a device
> enumeration scheme that is close to what libscg uses. This ie even
> true for Linux. If Linux did not hide this information for /dev/hd*
> based fd's, I could implement an abstraction layer.....

Not true, Linux has nothing of the sort internally for eg ATAPI devices.
I don't know why you think that, but it's simply not true at all.

-- 
Jens Axboe

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